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        <title><![CDATA[2009年安徽省中考数学试卷有答案及评分标准（清晰版）]]></title>
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		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%BD%CC%D1%A7">教学</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/07396d9b969119bcc9eaf4a5.html#comment">查看评论</a>]]></description>
        <pubDate>2009-07-07  19:46</pubDate>
        <category><![CDATA[教学]]></category>
        <author><![CDATA[电123456789]]></author>
		<guid>http://hi.baidu.com/%B5%E7123456789/blog/item/07396d9b969119bcc9eaf4a5.html</guid>
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<item>
        <title><![CDATA[数学考试应注意的问题]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/e4e22f09a35ca3a62eddd4e5.html]]></link>
        <description><![CDATA[
		
		<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 12pt; text-align: center; mso-line-height-rule: exactly" align="center"><strong style="mso-bidi-font-weight: normal"><em style="mso-bidi-font-style: normal"><span style="font-size: 12pt;  mso-ascii- mso-hansi-">数学考试应注意的问题</span></em></strong><strong style="mso-bidi-font-weight: normal"><em style="mso-bidi-font-style: normal"><span style="font-size: 12pt"></span></em></strong></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 15.75pt; line-height: 12pt; mso-line-height-rule: exactly; mso-char-indent-count: 1.5"><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">（</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">1</font></span><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">）把自己容易忽略和出错的事项在草稿纸上作好记号，如三角形的面积公式，四个象限点的符号，等，也可以写一两名提醒自己的话。</span><span style="mso-bidi-font-size: 10.5pt"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 15.75pt; line-height: 12pt; mso-line-height-rule: exactly; mso-char-indent-count: 1.5"><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">（</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">2</font></span><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">）仔细审题　考试时精力要集中，审题一定要细心。要放慢速度，逐字逐句搞清题意（似曾相识的题目更要注意异同），从多层面挖掘隐含条件及条件间内在联系，为快速解答提供可靠的信息和依据。否则，一味求快，丢三落四，不是思维受阻，就是前功尽弃。</span><span style="mso-bidi-font-size: 10.5pt"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 15.75pt; line-height: 12pt; mso-line-height-rule: exactly; mso-char-indent-count: 1.5"><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">（</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">3</font></span><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">）由易到难　就是先做容易题，后做难题。考试开始，顺利解答几个简单题目，可以产生&ldquo;旗开得胜&rdquo;的快感，促使大脑兴奋，有利于顺利进入最佳思维状态。考试中，要先做内容掌握比较到家、题型结构比较熟悉、解题思路比较清晰的题目。遇到难题，要敢于暂时&ldquo;放弃&rdquo;，不要浪费太多时间（一般地，选择或填空题每个不超过</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">2~3</font></span><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">分钟），等把会做的题目解答完后，再回头集中精力解决它。从近几年的中考中不难看出，选择、填空、解答三类题，比较难的都安排在比较靠后的位置，考场答题时由于数学的大题做起来时间较长，考生检查选择对错的几率比较小，而<strong style="mso-bidi-font-weight: normal"><em style="mso-bidi-font-style: normal">中考决定成败的关键也正是选择和填空题</em></strong>，三道选择填空的分数相当于一道大题，所以不要死抠难题，注意选择题的准确率，答这部分题时要求稳，争取一把成。在答</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">22</font></span><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">、</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">23</font></span><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">题时，第一问应放慢速度</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman"> </font></span><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">，力求做对。</span><span style="mso-bidi-font-size: 10.5pt"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 15.75pt; line-height: 12pt; mso-line-height-rule: exactly; mso-char-indent-count: 1.5"><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">（</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">4</font></span><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">）答题时应注意书写工整，字迹潦草很容易丢分。中考中的数学解答题都是按步给分的，如果过程比较简单，一旦出现错误往往会丢比较多的分，因此中间过程不要过于简单，这样即使错误也可以尽可能少扣分。又如一些探究性问题经常会这样说：请回答某某某命题是否成立，若成立，请加以证明。出现这种问法，一般那个命题大多是成立的，所以就算你不会证明，但是只要写上&ldquo;成立&rdquo;二字，就可以拿到</span><span style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">1</font></span><span style=" mso-ascii- mso-hansi- mso-bidi-font-size: 10.5pt">分的。对于一些题，无法解答，但可以根据题意写一些，经常会得到一些分。如果因为时间过紧或只知道结果而不能正确书写正确结果，就将正确答案写上</span><span style="mso-bidi-font-size: 10.5pt"></span></p> 
		
		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%C4%AC%C8%CF%B7%D6%C0%E0">默认分类</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/e4e22f09a35ca3a62eddd4e5.html#comment">查看评论</a>]]></description>
        <pubDate>2009-06-18  20:30</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
		<guid>http://hi.baidu.com/%B5%E7123456789/blog/item/e4e22f09a35ca3a62eddd4e5.html</guid>
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<item>
        <title><![CDATA[最后几天如何复习]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/98481aa9f07cc0f51e17a215.html]]></link>
        <description><![CDATA[
		
		<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  越临近中考，越应当注意降低复习难度，加强自我心理调节，设法增强<font color="#ff0000">自信</font>心，确保以最佳的精神状态迎接中考。</p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  在历年中考中，总有一些题是<font color="#ff0000">课本</font>上的习题、例题改编的。因此在这一阶段，考生要对课本中的重要例题、习题、课后阅读、课题学习进行认真复习研究，可使所学知识进一步提炼，增强备考信心。归纳总结所学知识。如初中所学的基本概念：实数、无理数、绝对值等；基本性质：图形性质、图形变换的规律等；基本计算：整式计算、方程、不等式的解法等；基本图形特征：中心对称和轴对称图形等。归纳总结所学知识，既可以统领全局，又可以细化知识网络，做到查漏补缺，心中有数。</p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   最后阶段的复习应着重知识的应用，<font color="#ff0000">看试卷和错题集</font>是一种有效的复习方法，把近期做过的大小试卷和练习题分门别类整理一下，定下心来仔细过一遍，把以前存在的问题弄清。必要时可对难点、重点和自己的弱点进行一些专项训练。做以前模拟卷上的错题是一个纠正错误的好方法，非常必要，同时在做错题的过程中要注意总结错题的类型，是粗心大意造成的还是知识点没有掌握好，及时加以纠正。考生可利用这一段时间再检查所学知识的漏洞，做到三看：一看复习资料中的总结和提示；二看试题的标准答案和评分标准，明确评分细则和答题技巧；三看复习资料、考试卷上的错题和易错题，尽可能地再做一遍，防止习惯性的重复出错。在近年的中考试题中，数学语言表达得不准确、逻辑关系不明是失分的一个重要原因。因此，在最后阶段，要加强证明题书写的规范练习，弄清逻辑推理的依据，考生可将模拟测试卷和标准答题卷进行对比，发现其中存在的问题，规范数学语言表达，依照得分点规范答题步骤。</p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  这一阶段初三生复习的关键就是提高答题准确率，把能拿的分都拿到，盲目做题不可取。要想提高答题准确率，考生要过的第一关就是<font color="#ff0000">审题</font>。往年中考时，不少考生因审题失误丢分，这是很可惜的。审题时，考生不妨花点儿时间，多读几遍题目，尤其是一些平时比较熟悉的题目更要注意。考生审题时不只要抓住题目中的关键字句，还要标记出重点，不能匆匆看一眼题目就开始做题。有的题目较长，一定要联系前后文关系仔细思考，了解题意。如果没有读清题意，就很可能出错。最后几天再去抠&ldquo;难题&rdquo;也来不及了，抓牢基础知识部分才是关键。中考试卷上基础部分权重较大，只有这部分少丢分，才能取得中考的好成绩。考生答题时要想好再作答，不要盲目追求答题速度，要保证质量。<font color="#ff0000">较高的答题准确率</font>是正确作答的关键，是得好成绩的关键。</p> 
		
		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%C4%AC%C8%CF%B7%D6%C0%E0">默认分类</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/98481aa9f07cc0f51e17a215.html#comment">查看评论</a>]]></description>
        <pubDate>2009-06-18  20:06</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
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        <title><![CDATA[函数与几何图形一例]]></title>
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        <description><![CDATA[
		
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        <pubDate>2009-05-28  22:16</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
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<item>
        <title><![CDATA[合肥市2009年中考二模数学试卷]]></title>
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        <description><![CDATA[
		
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        <pubDate>2009-05-11  20:01</pubDate>
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        <author><![CDATA[电123456789]]></author>
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        <title><![CDATA[2009安徽中考数学考纲深度剖析]]></title>
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		<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 15pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong><font face="宋体">一、考试内容和要求</font></strong></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font face="宋体"><span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font size="4"><font color="#000000">2009安徽中考数学</font></font></span></span><span><font color="#000000" size="4">学业考试内容和要求的确定依据《标准》，不依据任何一种版本的教材．本纲要分别对&ldquo;知识与技能&rdquo;、&ldquo;数学思考&rdquo;、&ldquo;解决问题&rdquo;及&ldquo;情感与态度&rdquo;四个方面的考试内容和要求进行了阐述．</font></span></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="font-size: 12pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;  </span>(</span><span style="font-size: 12pt">一<span>)</span>知识与技能</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;  </span></span><span>知识与技能考查的主要内容是：了解数的意义，理解数和代数运算的意义、算理；能够正确地进行基本运算与估算；能够在实际情境中有效地使用代数运算、代数模型及相关概念解决问题；能够借助不同的方法探索几何对象的有关性质；能够使用不同的方式表达几何对象的大小、形状和相对位置关系；能够在头脑里构建几何对象，进行几何图形的分解与组合，能对某些图形进行简单的变换；能够借助数学证明的方法确认数学命题的正确性；正确理解数据的含义，能够结合实际需要有效地表达数据特征，会根据数据结果做合理的预测；了解概率的基本含义，能够借助概率模型或通过设计具体活动解释一些事件发生的概率．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span>知识与技能考查的目标要求分为四个层次，本纲要对它们进行了不同的描述，这些层次的含义是：</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;  </span>(1)</span><span>了解</span><span>(</span><span>认识</span><span>)(a<sub>1</sub>)</span><span>：能从具体事例中，知道或能举例说明对象的有关特征</span><span>(</span><span>或意义</span><span>)</span><span>；能根据对象的特征，从具体情境中辨认出这一对象．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span>(2)</span><span>理解</span><span>(a<sub>2</sub>)</span><span>：能描述对象的特征和由来；能明确地阐述此对象与有关对象之间的区别和联系．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span>(3)</span><span>掌握</span><span>(a<sub>3</sub>)</span><span>：能在理解的基础上，把对象运用到新的情境中．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21.75pt"><font size="4"><font color="#000000"><font face="宋体"><span>(4)</span><span>运用</span><span>(a<sub>4</sub>)</span><span>：能综合运用知识，合理地选择与运用有关的方法完成特定的数学任务．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="font-size: 12pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>(</span><span style="font-size: 12pt">二<span>)</span>数学思考</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">数学思考特指在面临各种问题情境时，能够从数学的角度去思考问题，能够发现其中所存在的数学现象并运用数学的知识与方法去解决问题．该领域应特别关注学生在数感、符号感、空问观念、统计观念、应用意识、推理能力等方面的发展情况，在考试中主要体现在以下几个方面：</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span>l.</span><span style="mso-bidi-font-size: 10.5pt">描述现实世界，具有初步的数感、符号感和抽象思维能力．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;  </span></span><span style="mso-bidi-font-size: 10.5pt">这一目标主要包括能够在较复杂的层面上用数字和图表刻画现实生活中的现象，对一些数字信息作出合理解释与推断，并运用代数中的方程、不等式、函数等去刻画具体问题，建立合适的数学模型．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span>2</span><span style="mso-bidi-font-size: 10.5pt">．对现实空间及图形有较丰富的认识，具有初步的空间观念和形象思维能力．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;  </span></span><span style="mso-bidi-font-size: 10.5pt">这一目标主要包括能够通过动手操作、图形变换等多种方式探索图形的形状、大小、位置关系、等量关系等，进行简单的图案设计、构建几何空间，并尝试用图形去从事推理活动．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;  </span>3.</span><span style="mso-bidi-font-size: 10.5pt">能运用数据描述信息，做出合理推断，具有统计的观念．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;  </span></span><span style="mso-bidi-font-size: 10.5pt">这一目标主要包括能够从事较为完整的统计活动，能针对现实情景中呈现的原始数据，并根据需要进行重新整理和分析，对数据作数学处理，按照处理的结果做出合理推断与决策．同时了解在现实情境中收集与表达数据的基本方法，能够运用计算器或计算机来处理较为复杂的数据．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt">&nbsp;&nbsp;&nbsp;  4</span><span style="mso-bidi-font-size: 10.5pt">．能够通过观察、实验、猜想、证明等数学活动过程，作出合情推理和演绎推理，能有条理地、清晰地阐述自己的观点．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font color="#000000"><font face="宋体">这一目标主要包括能够通过推理作出合理的判断与选择，尝试通过不同的方式去检验一个猜想的可信性，通过不同类型的推理活动形成一个合乎情理的猜想，并能够用比较规范的逻辑推理形式表达自己的演绎推理过程．<span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;  </span></span></font></font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="font-size: 12pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span>(</span><span style="font-size: 12pt">三<span>)</span>解决问题</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt; mso-char-indent-count: 2.0"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">问题解决方面考查的核心是通过&ldquo;观察、思考、猜测、推理&rdquo;等思维活动解决问题，主要体现在以下方面：</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt">1</span><span style="mso-bidi-font-size: 10.5pt">．能够从数学的角度提出问题、理解问题．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 15.75pt; mso-char-indent-count: 1.5"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">这一目标主要包括能够从日常生活中&ldquo;看到&rdquo;一些数学现象，并从数学现象、其他学科中的问题中发现数学关系或数学问题，能够综合运用相关的数学知识、方法去解决一些问题．</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt">2</span><span style="mso-bidi-font-size: 10.5pt">．具备解决问题的基本策略和多样策略，具有实践能力和创新精神．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt; mso-char-indent-count: 2.0"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">这一目标主要包括让学生尝试寻找不同的解决问题方法，评价不同方法之间的差异，从不同的角度去认识同一个问题．</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt">3</span><span style="mso-bidi-font-size: 10.5pt">．具有初步评价与反思的意识．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">这一目标主要包括能够反思自己是怎样得到问题的答案的，在求解过程中不断反思所得到的结果的含义、所使用的方法的一般性等，会分析自己思维过程中的得与失，通过反思能够把握住使得结论成立的核心条件，并形成数学方法的有效迁移．能够综合空间与图形、代数和统计等方面的知识与方法，探索问题的解，在解决原有问题的基础上还能够提出新的问题．</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;  </span></span><span style="font-size: 12pt">(</span><span style="font-size: 12pt">四<span>)</span>情感与态度</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">对于学生在情感与态度方面的目标要求，本纲要不单独列出，学业考试中将结合知识技能、数学活动与思考和解决问题等目标进行渗透，主要体现在试题的教育价值上．</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="font-size: 12pt"><strong>二、考试的形式与试卷结构</strong></span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span>1．考试形式</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">考试采用闭卷笔试形式，考试时间<span>120</span>分钟．试卷卷面成绩满分<span>150</span>分．学业考试的最后成绩采用等级或等级附分数的形式呈现，其中合格标准应以《标准》的基本目标为依据，而其他等级标准由各地根据考试结果，参考当地教育资源情况具体决定．</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span>2．试卷结构</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt">(1)</span><span style="mso-bidi-font-size: 10.5pt">考试内容分布：</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 15.75pt; mso-char-indent-count: 1.5"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">&nbsp;&nbsp;  数与代数内容约占<span>50</span>％，</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">空间与图形内容约占<span>35</span>％，</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span><span style="mso-spacerun: yes"> </span></span><span style="mso-bidi-font-size: 10.5pt">统计与概率内容约占<span>15</span>％．</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt">(2)</span><span style="mso-bidi-font-size: 10.5pt">考试要求分布：</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">了解水平的试题占<span>30</span>％±<span>5</span>％，</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">理解水平的试题占<span>30</span>％±<span>5</span>％，</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">掌握水平的试题占<span>20</span>％±<span>5</span>％，</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">灵活运用水平的试题占<span>5</span>％±<span>5</span>％，</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">数学活动与思考及解决问题方面的试题共占<span>15</span>％<span>+5</span>％．</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 15.75pt; mso-char-indent-count: 1.5"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt">(3)</span><span style="mso-bidi-font-size: 10.5pt">试题类型分布：</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 15.75pt; mso-char-indent-count: 1.5"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">试题分选择题、填空题和解答题三种题型．</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">选择题是四选一型的单项选择题；填空题只要求直接填写结果，不必写出计算过程或推证过程；解答题包括计算题、证明题、应用题以及探索、开放性试题等．</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">三种题型的分布比例为：</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">选择题占<span>25</span>％±<span>5</span>％，</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">填空题占<span>15</span>％±<span>5</span>％，</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font face="宋体" color="#000000"><span style="mso-bidi-font-size: 10.5pt">解答题占<span>60</span>％±<span>5</span>％．</span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt">(4)</span><span style="mso-bidi-font-size: 10.5pt">试题的难度分布：</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="4"><font color="#000000"><font face="宋体"><span style="mso-bidi-font-size: 10.5pt">容易题<span>(</span>难度系数为<span>0.</span></span><span style="mso-bidi-font-size: 10.5pt">7</span><span style="mso-bidi-font-size: 10.5pt">以上<span>)</span>占6<span>0</span>％左右，</span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">较难题<span>(</span>难度系数为<span>0.4</span>～<span>O.7)</span>占3<span>0</span>％左右，</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">难题<span>(</span>难度系数为<span>0.4</span>以下<span>)</span>占<span>10</span>％左右</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000"><strong>三、复习策略</strong></font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><span style="mso-bidi-font-size: 10.5pt"><font size="4"><font face="宋体" color="#000000">分层次复习效果好<br>
&nbsp;&nbsp;&nbsp;  《纲要》数学部分在考试内容和要求上，与去年保持一致。考生在复习的时候要更加重视考纲，复习的总体思想要与考纲一致，在内容上要与考纲相对照。坚持基础知识不增不减，做到两个&ldquo;凡是&rdquo;：凡是考纲没有要求的，要毫不犹豫地舍弃；凡是考纲上有的知识点，一定不能放弃，不能存在侥幸心理。<br>
&nbsp;&nbsp;&nbsp;  在&ldquo;知识与技能&rdquo;这一方面，考生要按照考纲的要求，在老师的指导下，尽可能准确地把握好&ldquo;度&rdquo;，落实对知识的了解、理解、掌握、运用四个方面的要求。<br>
&nbsp;&nbsp;&nbsp;  考生应该根据自己的程度和升学目标，确定复习的侧重点：（1）对于基础较好，目标为省示范高中的考生，所有在考纲上要求理解、掌握、运用的知识点都不能马虎，要重视数学思想方法及其应用，加强能力训练；（2）对于中等程度、目标为市示范高中的同学，对考纲上要求目标为理解、掌握的知识点要多下功夫，至于运用层次的知识点，相应要求应适当放低。但是这两类考生在训练的时候，都不要钻偏题、怪题、繁题。历年来安徽省的中考题一向质量较高，多年不考偏、难、繁题。因此在训练难度上一定要注意把握。（3）对于基础一般，处在高中录取分数线上下的考生，更要重视基础题，适当放弃一些灵活性较强的难度题的训练。<br>
&nbsp;&nbsp;&nbsp;&nbsp;  考生应注意心理调节，做好考前准备。复习后期产生的厌战情绪、焦躁不安的心情都要努力克服。要主动调节自己的生活与学习安排，适度锻炼，另一方面也要注意科学安排复习计划，差漏补缺，努力克服浮躁心情。<br>
</font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"> </p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"> </p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"> </p> 
		
		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%C4%AC%C8%CF%B7%D6%C0%E0">默认分类</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/19dc762eccea0b584fc2268c.html#comment">查看评论</a>]]></description>
        <pubDate>2009-04-29  20:32</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
		<guid>http://hi.baidu.com/%B5%E7123456789/blog/item/19dc762eccea0b584fc2268c.html</guid>
</item>

<item>
        <title><![CDATA[三角形最小的边长的取值范围]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/b1225e08beab1a38e92488cd.html]]></link>
        <description><![CDATA[
		
		<p><strong><font color="#0000ff" size="4">三角形ABC三边都不相等,它的周长为8,其中最大的边<span style="font-size: 10.5pt;  mso-bidi-font-size: 12.0pt; mso-fareast- mso-font-kerning: 1.0pt; mso-ansi- mso-fareast- mso-bidi-">a</span>为3,最小的边长<span style="font-size: 10.5pt;  mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi- mso-fareast- mso-bidi- mso-bidi-">c</span>,则<span style="font-size: 10.5pt;  mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi- mso-fareast- mso-bidi- mso-bidi-">c</span>的取值范围是多少?</font></strong></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="5"><font color="#0000ff"><span style=" mso-bidi-">解：∵</span><font face="Times New Roman"><span>a+b+c=8,a=3,</span><span></span></font></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="5"><font color="#0000ff"><span style=" mso-ascii- mso-hansi-">&nbsp;&nbsp;&nbsp;  ∴</span><span><font face="Times New Roman">b+c=5,</font></span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style=" mso-bidi-"><font size="5"><font color="#0000ff">&nbsp;&nbsp;&nbsp;  ∵<span>b</span>＞<span>c,</span></font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><font size="5"><font color="#0000ff"><span style=" mso-ascii- mso-hansi-">&nbsp;&nbsp;&nbsp;  ∴</span><span><font face="Times New Roman">2b</font></span><span style=" mso-bidi-">＞<span>b+c,</span></span></font></font></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style=" mso-bidi-"><font size="5"><font color="#0000ff">&nbsp;&nbsp;&nbsp;  ∴<span>b</span>＞<span>2.5</span></font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style=" mso-bidi-"><font size="5"><font color="#0000ff">&nbsp;&nbsp;&nbsp;  ∵<span>a</span>＞<span>b</span></font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style=" mso-bidi-"><font size="5"><font color="#0000ff">&nbsp;&nbsp;&nbsp;  ∴<span>b</span>＜<span>3</span></font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style=" mso-bidi-"><font size="5"><font color="#0000ff">&nbsp;&nbsp;&nbsp;  ∴<span>2.5</span>＜<span>b</span>＜<span>3</span></font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style=" mso-bidi-"><font size="5"><font color="#0000ff">&nbsp;&nbsp;&nbsp;  ∵<span>c=5-b,</span></font></font></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style=" mso-bidi-"><font size="5"><font color="#0000ff">&nbsp;&nbsp;&nbsp;  ∴<span>2</span>＜<span>c</span>＜<span>2.5</span></font></font></span></p>
<p> </p> 
		
		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%BD%CC%D1%A7">教学</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/b1225e08beab1a38e92488cd.html#comment">查看评论</a>]]></description>
        <pubDate>2009-03-01  21:54</pubDate>
        <category><![CDATA[教学]]></category>
        <author><![CDATA[电123456789]]></author>
		<guid>http://hi.baidu.com/%B5%E7123456789/blog/item/b1225e08beab1a38e92488cd.html</guid>
</item>

<item>
        <title><![CDATA[圆中的动点与定值]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/1af7bfcd1a199b590fb345c1.html]]></link>
        <description><![CDATA[
		
		<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">〖题目〗：</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">在⊙</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">O</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">中，劣弧</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">为</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">120</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°，</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">C</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">是劣弧</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">的中点，</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">A</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">是优弧</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">上的一个动点，</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">求证：</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">(AB+AD):AC</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">是定值</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-"><img src="http://blog.teacher.com.cn/UploadFiles/2008-6/619224842.jpg"></span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></div>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">〖分析〗：</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%; ">1</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">、特殊位置找定值</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">当点</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">A</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">是优弧</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">的中点时，</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">AC</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">为⊙</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">O</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">的直径，</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">又∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BAC=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">DAC=30</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°，</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">AB:AC=AD:AC=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">√</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">3/2</span></p>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">(AB+AD):AC=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">√</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">3</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">（是定值）</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-"><img src="http://blog.teacher.com.cn/UploadFiles/2008-6/619930549.jpg"></span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"> </div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%; ">2</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">、一般情况证结论</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"> </div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-"><img src="http://blog.teacher.com.cn/UploadFiles/2008-6/619945490.jpg"></span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></div>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">过点</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">C</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">作</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CE</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">⊥</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">AB</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">，</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CF</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">⊥</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">AD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">，</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">E</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">、</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">F</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">为垂足，</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∵</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">C</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">是劣弧</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">的中点，劣弧</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">为</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">120</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BAC=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">DAC=30</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">AE:AC=AF:AC=cos30</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">√</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">3/2</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%; "><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴<strong>AE=AF</strong></span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">在<span style="font-size: 14pt; color: blue; line-height: 150%; ">Rt</span>△</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CEB</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">和<span style="font-size: 14pt; color: blue; line-height: 150%; ">Rt</span>△</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CFD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">中，</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%; ">CE=CF</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">（角平分线上任意一点到这个角的两边距离相等）</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CBE=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CDF</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">（圆内接四边形的外角等于它的内对角）</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">Rt</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">△</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CEB</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">≌</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">Rt</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">△</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CFD</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BE=DF</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">AB+AD=AE+BE+AD=AE+DF+AD=AE+AF=2AE</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">(AB+AD):AC=2AE:AC=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">√</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">3</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">（是定值）</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">〖说明〗：</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%; ">1</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">、当原题中&ldquo;劣弧</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">为</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">120</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°&rdquo;改为&ldquo;劣弧</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BD的度数</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">为α&rdquo;时，</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">(AB+AD):AC</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">仍是定值（</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">2 cos</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">α</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">/4</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">）。</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%"></span> </div>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%; ">2</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">、本题所涉及圆的知识属基本要求。（同弧所对的圆周角相等；直径所对的圆周角是直角）</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt; line-height: 150%; mso-char-indent-count: 1.5"> </p> 
		
		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%BD%CC%D1%A7">教学</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/1af7bfcd1a199b590fb345c1.html#comment">查看评论</a>]]></description>
        <pubDate>2009-03-01  21:49</pubDate>
        <category><![CDATA[教学]]></category>
        <author><![CDATA[电123456789]]></author>
		<guid>http://hi.baidu.com/%B5%E7123456789/blog/item/1af7bfcd1a199b590fb345c1.html</guid>
</item>

<item>
        <title><![CDATA[寒假应怎么做]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/ecf0a5031995128fd43f7c81.html]]></link>
        <description><![CDATA[
		
		<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  <strong><font size="3">合理安排好时间，过好寒假生活。</font></strong></p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  中考看的是考试总分，考生各科成绩均衡很重要。初三学生可以利用这个寒假纠正自己的偏科习惯。纠正偏科首先要解决心态问题。很多考生数学不好，主要是害怕数学，认为自己没有数学天赋，学不好。其实只要努力，大部分学生的偏科现象都可以纠正过来。</p>
<p>　　根据期末考试结果，初三学生要抽出时间认真总结教训，找出自己的强弱项，并强化强项，弥补弱项。弱项提高分数的空间很大，要认真分析自己弱项的问题所在，找到弥补的办法。除了在弱项上多花时间外，强项也不能放松。有的学生觉得自己平时数学不错，就很少花时间在数学上，结果到了中考时，数学成绩反而下降了。数学不用做很多的题，但所作的每道题都要弄懂，就是举一反三的意思。</p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  预习下一学期的学习内容,一遍过后找出哪些地方是难点,再次学习,解决难点.使你在下学期的学习中不费力气就能遥遥领先!</p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;   有自己解决不了的问题，千万不要死抠或置之不理，打电话请教一下老师或同学吧！</p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  寒假生活要劳逸结合，可多和父母、老师或同学沟通交流，减轻压力，保持良好心态。</p> 
		
		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%C4%AC%C8%CF%B7%D6%C0%E0">默认分类</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/ecf0a5031995128fd43f7c81.html#comment">查看评论</a>]]></description>
        <pubDate>2009-02-01  20:23</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
		<guid>http://hi.baidu.com/%B5%E7123456789/blog/item/ecf0a5031995128fd43f7c81.html</guid>
</item>

<item>
        <title><![CDATA[利用旋转，构造全等三角形]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/82468813a6db19055aaf5324.html]]></link>
        <description><![CDATA[
		
		<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">如图，正方形</span><span style="font-size: 14pt; color: blue; ">ABCD</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">中，∠</span><span style="font-size: 14pt; color: blue; ">EBF=45<sup>0</sup></span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue; ">MB</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">⊥</span><span style="font-size: 14pt; color: blue; ">EF</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">于</span><span style="font-size: 14pt; color: blue; ">M</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，</span><span style="font-size: 14pt; color: blue; ">BA</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">与</span><span style="font-size: 14pt; color: blue; ">BM</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">相等吗？说说你的理由。</span><span style="font-size: 14pt; color: blue"></span></div>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue"></span></p>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-"><img src="http://blog.teacher.com.cn/UploadFiles/2007-7/75100024.jpg"></span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">〖分析〗：利用旋转，构造全等三角形。</span><span style="font-size: 14pt; color: blue"></span></div>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">〖答〗</span><span style="font-size: 14pt; color: blue; ">BA</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">与</span><span style="font-size: 14pt; color: blue; ">BM</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">相等。</span><span style="font-size: 14pt; color: blue"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">【证明】：</span><span style="font-size: 14pt; color: blue"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue"></span></p>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">将△</span><span style="font-size: 14pt; color: blue; ">BCF</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">以</span><span style="font-size: 14pt; color: blue; ">B</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">为旋转中心，逆时针方向旋转</span><span style="font-size: 14pt; color: blue; ">90<sup>0</sup></span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">则△</span><span style="font-size: 14pt; color: blue; ">BCF</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">≌△</span><span style="font-size: 14pt; color: blue; ">BAG</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">在△</span><span style="font-size: 14pt; color: blue; ">BFE</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">和△</span><span style="font-size: 14pt; color: blue; ">BGE</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">中，</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue; ">BF=BG</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，∠</span><span style="font-size: 14pt; color: blue; ">FBE=</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; ">GBE<span style="font-size: 14pt; color: blue;  mso-fareast- mso-font-kerning: 1.0pt; mso-ansi- mso-fareast- mso-bidi-">=45<sup>0</sup></span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi- mso-font-kerning: 1.0pt; mso-ansi- mso-fareast- mso-bidi- mso-bidi-">，</span></span><span style="font-size: 14pt; color: blue; ">BE=BE </span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">∴△</span><span style="font-size: 14pt; color: blue; ">BFE</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">≌△</span><span style="font-size: 14pt; color: blue; ">BGE</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">又∠</span><span style="font-size: 14pt; color: blue; ">BMF=</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; ">BAG=90<sup>0</sup></span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; ">BS=BM</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">（全等三角形对应边上的高相等）。</span><span style="font-size: 14pt; color: blue"></span></div>
<br>
<img src="http://blog.teacher.com.cn/UploadFiles/2007-7/75674883.jpg"><br> 
		
		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%C4%AC%C8%CF%B7%D6%C0%E0">默认分类</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/82468813a6db19055aaf5324.html#comment">查看评论</a>]]></description>
        <pubDate>2009-01-10  22:01</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
		<guid>http://hi.baidu.com/%B5%E7123456789/blog/item/82468813a6db19055aaf5324.html</guid>
</item>

<item>
        <title><![CDATA[田忌赛马与概率]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/af0740d828142a3233fa1c5b.html]]></link>
        <description><![CDATA[
		
		<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt; mso-char-indent-count: 1.5"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">田忌赛马是一个为人熟知的故事．传说战国时期，齐王与田忌各有上、中、下三匹马，同等级的马中，齐王的马比田忌的马强．有一天，齐王要与田忌赛马，双方约定：比赛三局，每局各出一匹，每匹马赛一次，赢得两局者为胜．看样子田忌似乎没有什么胜的希望，但是田忌的谋士了解到主人的上、中等马分别比齐王的中、下等马要强</span><span style="font-size: 14pt; color: blue; "> </span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">。</span><span style="font-size: 14pt; color: blue"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt 15.75pt; mso-para-margin-left: 1.5gd"><span style="font-size: 14pt; color: blue; ">( 1 )</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">、如果齐王将马按上中下的顺序出阵比赛，那么田忌的马如何出阵，田忌才能取胜？</span><span style="font-size: 14pt; color: blue; "> <span></span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt 15.75pt; mso-para-margin-left: 1.5gd"><span style="font-size: 14pt; color: blue; ">( 2 )</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">、如果齐王将马按上中下的顺序出阵，而田忌的马随机出阵比赛，田忌获胜的概率是多少？（要求写出双方对阵的所有情况）</span><span style="font-size: 14pt; color: blue"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: red;  mso-ascii- mso-hansi-">〖解〗：</span><span style="font-size: 14pt; color: red"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">（</span><span style="font-size: 14pt; color: blue; ">1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">）由于田忌的上、中等马分别比齐王的中、下等马强，当齐王的马按上、中、下顺序出阵时，田忌的马按下、上、中的顺序出阵，田忌才能取胜。</span><span style="font-size: 14pt; color: blue; "> </span></p>
<p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; mso-para-margin-top: .5gd"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">（</span><span style="font-size: 14pt; color: blue; ">2</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">）当田忌的马随机出阵时，双方马的对阵情况如下表</span><span style="font-size: 14pt; color: blue"></span></p>
<table class="MsoNormalTable" style="border-right: medium none; border-top: medium none; border-left: medium none; border-bottom: medium none; border-collapse: collapse; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext" cellspacing="0" cellpadding="0" border="1">
    <tbody>
        <tr style="height: 22.2pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes">
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: windowtext 1pt solid; width: 55.7pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt" width="74">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">齐王的马</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.85pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">上中下</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.85pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">上中下</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.9pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">上中下</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.85pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">上中下</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.85pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">上中下</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.9pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">上中下</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
        </tr>
        <tr style="height: 22.2pt; mso-yfti-irow: 1; mso-yfti-lastrow: yes">
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: windowtext 1pt solid; width: 55.7pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="74">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">田忌的马</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.85pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">上中下</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.85pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">上下中</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.9pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">中上下</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.85pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">中下上</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.85pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">下<span style="font-size: 10pt; color: #ff0000">上中</span></span><span style="font-size: 10pt; color: #ff0000"></span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 48.9pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; height: 22.2pt; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="65">
            <p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; text-align: center; mso-para-margin-top: .5gd" align="center"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">下中上</span><span style="font-size: 10pt; color: blue"></span></p>
            </td>
        </tr>
    </tbody>
</table>
<p class="MsoNormal" style="margin: 7.8pt 0cm 0pt; mso-para-margin-top: .5gd"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">双方马的对阵中，只有一种对抗情况田忌能赢，</span><span style="font-size: 14pt; color: blue"></span></p>
<div class="MsoNormal" style="margin: 7.8pt 0cm 0pt; mso-para-margin-top: .5gd"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">所以田忌获胜的概率</span><span style="font-size: 14pt; color: blue; ">P=1/6</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">。</span></div> 
		
		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%C4%AC%C8%CF%B7%D6%C0%E0">默认分类</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/af0740d828142a3233fa1c5b.html#comment">查看评论</a>]]></description>
        <pubDate>2009-01-10  21:59</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
		<guid>http://hi.baidu.com/%B5%E7123456789/blog/item/af0740d828142a3233fa1c5b.html</guid>
</item>

<item>
        <title><![CDATA[用图像法求一元二次方程的近似解]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/fe0de3a16138e98c4710645a.html]]></link>
        <description><![CDATA[
		
		<p><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-"><span><span style="font-size: 14pt; color: #0000ff">用图像法求一元二次方程的近似解<span style="font-size: 14pt; color: blue"></span></span></span></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-"><span style="font-size: 14pt">〖题目〗：用图像法求方程</span><span style="font-size: 14pt; color: blue; "><span style="font-size: 14pt">x<sup>2</sup></span>-x-1=0</span>的近似解（精确到</span><span style="font-size: 14pt; color: blue; ">0.1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">）</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">&nbsp;&nbsp;&nbsp;  同学甲说：这还不好做吗？你看：抛物线</span><span style="font-size: 14pt; color: blue; ">y=ax<sup>2</sup>+bx+c(a</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">≠</span><span style="font-size: 14pt; color: blue; ">0)</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">与轴的交点就是方程</span><span style="font-size: 14pt; color: blue; ">ax<sup>2</sup>+bx+c=0(a</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">≠</span><span style="font-size: 14pt; color: blue; ">0)</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">的根，图像画准确点就行了。</span><span style="font-size: 14pt; color: blue"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">&nbsp;&nbsp;&nbsp;  同学乙说：这类题就是不好做嘛！你看：抛物线画的准确比较难，再说，就是画准确了，其交点在某两个数之间，那如何能准确说出它的近似值呢？</span><span style="font-size: 14pt; color: blue"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">&nbsp;&nbsp;&nbsp;  我说：这两位同学说的都有道理。从其思路、方法来看，同学甲说的有道理；从具体操作来看，同学乙说的也不是没有根据。关键是根据图像，如何能较准确说出它的近似值。</span><span style="font-size: 14pt; color: blue"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">〖解〗：设抛物线</span><span style="font-size: 14pt; color: blue; ">y= x<sup>2</sup>-x-1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，配方的</span><span style="font-size: 14pt; color: blue; ">y=(x-0.5)<sup>2</sup>-1.25,</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">∴抛物线</span><span style="font-size: 14pt; color: blue; ">y= x<sup>2</sup>-x-1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">的对称轴为直线</span><span style="font-size: 14pt; color: blue; ">x=0.5,</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">（</span><span style="font-size: 14pt; color: blue; ">1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">）、列表</span><span style="font-size: 14pt; color: blue"></span></p>
<p>
<table class="MsoTableGrid" style="border-right: medium none; border-top: medium none; border-left: medium none; border-bottom: medium none; border-collapse: collapse; mso-border-alt: solid windowtext .5pt; mso-yfti-tbllook: 480; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext" cellspacing="0" cellpadding="0" border="1">
    <tbody>
        <tr style="mso-yfti-irow: 0; mso-yfti-firstrow: yes">
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: windowtext 1pt solid; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">x</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">…</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">-1</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">-0.5</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">0</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">0.5</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">1</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">1.5</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.65pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">2</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.65pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">…</span></p>
            </td>
        </tr>
        <tr style="mso-yfti-irow: 1; mso-yfti-lastrow: yes">
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: windowtext 1pt solid; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">y</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">…</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">1</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">-0.25</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">-1</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">-1.25</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">-1</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.6pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">-0.25</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.65pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue; ">1</span></p>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: #ece9d8; padding-left: 5.4pt; padding-bottom: 0cm; border-left: #ece9d8; width: 42.65pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" valign="top" width="57">
            <p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 10pt; color: blue;  mso-ascii- mso-hansi-">…</span></p>
            </td>
        </tr>
    </tbody>
</table>
</p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">（</span><span style="font-size: 14pt; color: blue; ">2</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">）、在平面直角坐标系中，描点、连线，画图像</span><span style="font-size: 14pt; color: blue"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue"></span></p>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  background-color: #ffffff; mso-ascii- mso-hansi-"> <img src="http://blog.teacher.com.cn/UploadFiles/2007-9/921880410.jpg"></span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">（</span><span style="font-size: 14pt; color: blue; ">3</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">）、观察图像，方程</span><span style="font-size: 14pt; color: blue; ">x<sup>2</sup>-x-1=0</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">有两个根，一个在</span><span style="font-size: 14pt; color: blue; ">-1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">和</span><span style="font-size: 14pt; color: blue; ">-0.5</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">之间，另一个在</span><span style="font-size: 14pt; color: blue; ">1.5</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">和</span><span style="font-size: 14pt; color: blue; ">2</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">之间，</span><span style="font-size: 14pt; color: blue"></span></div>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt; mso-char-indent-count: 1.5"><span style="font-size: 14pt; color: fuchsia;  mso-ascii- mso-hansi-">在</span><span style="font-size: 14pt; color: fuchsia; ">1.5</span><span style="font-size: 14pt; color: fuchsia;  mso-ascii- mso-hansi-">和</span><span style="font-size: 14pt; color: fuchsia; ">2</span><span style="font-size: 14pt; color: fuchsia;  mso-ascii- mso-hansi-">之间</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，如果取</span><span style="font-size: 14pt; color: blue; ">x=1.6,</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">利用计算器，得此时</span><span style="font-size: 14pt; color: blue; ">y=-0.04, </span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">取</span><span style="font-size: 14pt; color: blue; ">x=1.7,</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">利用计算器，得此时</span><span style="font-size: 14pt; color: blue; ">y=0.19</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">（请注意</span><span style="font-size: 14pt; color: blue; ">y</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">值符号的变化），故一个根在</span><span style="font-size: 14pt; color: blue; ">1.6</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">与</span><span style="font-size: 14pt; color: blue; ">1.7</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">之间，而题目要求精确到</span><span style="font-size: 14pt; color: blue; ">0.1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，这时取</span><span style="font-size: 14pt; color: blue; ">x=1.6</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">或</span><span style="font-size: 14pt; color: blue; "> <span>x=1.7</span></span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">作为近似根都符合要求</span><span style="font-size: 14pt; color: blue; ">,</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">但</span><span style="font-size: 14pt; color: blue; ">x=1.6, y=-0.04</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">比</span><span style="font-size: 14pt; color: blue; ">y=0.19</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">更接近</span><span style="font-size: 14pt; color: blue; ">0</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，故宜选</span><span style="font-size: 14pt; color: blue; ">x=1.6</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 28pt; mso-char-indent-count: 2.0"><span style="font-size: 14pt; color: fuchsia;  mso-ascii- mso-hansi-">在</span><span style="font-size: 14pt; color: fuchsia; ">-1</span><span style="font-size: 14pt; color: fuchsia;  mso-ascii- mso-hansi-">和</span><span style="font-size: 14pt; color: fuchsia; ">-0.5</span><span style="font-size: 14pt; color: fuchsia;  mso-ascii- mso-hansi-">之间</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，如果取</span><span style="font-size: 14pt; color: blue; ">x=-0.6,</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">利用计算器，得此时</span><span style="font-size: 14pt; color: blue; ">y=-0.04, </span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">取</span><span style="font-size: 14pt; color: blue; ">x=-0.7,</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">利用计算器，得此时</span><span style="font-size: 14pt; color: blue; ">y=0.19</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">（请注意</span><span style="font-size: 14pt; color: blue; ">y</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">值符号的变化），故一个根在</span><span style="font-size: 14pt; color: blue; ">-0.6</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">与</span><span style="font-size: 14pt; color: blue; ">-0.7</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">之间，而题目要求精确到</span><span style="font-size: 14pt; color: blue; ">0.1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，这时取</span><span style="font-size: 14pt; color: blue; ">x=-0.6</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">或</span><span style="font-size: 14pt; color: blue; "> <span>x=-0.7</span></span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">作为近似根都符合要求</span><span style="font-size: 14pt; color: blue; ">,</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">但</span><span style="font-size: 14pt; color: blue; ">x=-0.6, y=-0.04</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">比</span><span style="font-size: 14pt; color: blue; ">y=0.19</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">更接近</span><span style="font-size: 14pt; color: blue; ">0</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，故宜选</span><span style="font-size: 14pt; color: blue; ">x=-0.6</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">所以，方程</span><span style="font-size: 14pt; color: blue; ">x<sup>2</sup>-x-1=0</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">的近似解（精确到</span><span style="font-size: 14pt; color: blue; ">0.1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">）为</span><span style="font-size: 14pt; color: blue; ">x<sub>1</sub>=-0.6</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">，</span><span style="font-size: 14pt; color: blue; ">x<sub>2</sub>=1.6</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">〖点评〗：</span><span style="font-size: 14pt; color: blue"></span></p>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue; ">1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">、如果图像画的不准确怎么办？</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">答：图像应该尽量画准确，如果实在不行，可参考列表中的数值，其交点一定在使函数值符号变化的区间内。</span><span style="font-size: 14pt; color: blue"></span></div>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt"><span style="font-size: 14pt; color: blue; ">2</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">、方程</span><span style="font-size: 14pt; color: blue; ">x<sup>2</sup>-x-1=0</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">有两个根，还可以分别画出</span><span style="font-size: 14pt; color: blue; ">y=x<sup>2</sup></span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">和</span><span style="font-size: 14pt; color: blue; ">y=x+1</span><span style="font-size: 14pt; color: blue;  mso-ascii- mso-hansi-">的图像，它们的交点的横坐标就是其近似解。</span></p> 
		
		<br/><b>类别：</b><a href="http://hi.baidu.com/%B5%E7123456789/blog/category/%C4%AC%C8%CF%B7%D6%C0%E0">默认分类</a>&nbsp;<a href="http://hi.baidu.com/%B5%E7123456789/blog/item/fe0de3a16138e98c4710645a.html#comment">查看评论</a>]]></description>
        <pubDate>2009-01-10  21:58</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
		<guid>http://hi.baidu.com/%B5%E7123456789/blog/item/fe0de3a16138e98c4710645a.html</guid>
</item>

<item>
        <title><![CDATA[等腰梯形]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/60cf8c62eb1d7edae7113a59.html]]></link>
        <description><![CDATA[
		
		<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">题目：</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">在等腰梯形</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">ABCD</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">中，底角B为</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">60</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°，腰长为</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">4</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">，下底BC长为</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">7</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">，在BC边上有一动点</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">P,</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">连接</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">AP</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">，在腰CD上有一点</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">E</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">，</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">DE/CD=5/8,P</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">点在什么位置时∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">APE</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">为</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">60</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">度？</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%"></span> </div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">解：根据题意，画出图形如下：</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-"><img src="http://blog.teacher.com.cn/UploadFiles/2008-4/422781808.jpg"></span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></div>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∵</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">DE/CD=5/8,CD=AB=4,</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CE=1.5</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∵∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BAP+</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BPA=180</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°－</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">60</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">=120</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CPE+</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BPA=180</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°－</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">60</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">=120</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">BAP=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">CPE, </span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">又∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">B=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">C=60</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">°</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴△</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">APB</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∽△</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">PEC</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">，</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">∴</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">AB:PB=PC:EC</span></p>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">设</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">PB=x,</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">则</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">4</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">：</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">x=</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">（</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">7</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">－</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">x</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">）：</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">1.5</span></p>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">解这个方程，得</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">x=1</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">和</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">x=6</span></div>
<div class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%; "><img src="http://blog.teacher.com.cn/UploadFiles/2008-4/422218649.jpg"></span></div>
<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%"><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">即当</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">PB=1</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">或</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">PB=6</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">时，∠</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">APE</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">为</span><span style="font-size: 14pt; color: blue; line-height: 150%; ">60</span><span style="font-size: 14pt; color: blue; line-height: 150%;  mso-ascii- mso-hansi-">度。</span><span style="font-size: 14pt; color: blue; line-height: 150%"></span></p> 
		
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        <pubDate>2009-01-10  21:56</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
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<item>
        <title><![CDATA[2008中考各省市真题]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/fe4ef44b96935bf782025cf0.html]]></link>
        <description><![CDATA[
		
		<p><u><font color="#0000ff">2008中考各省市真题</font></u></p>
<p><a href="http://www.tl100.com/zhongkao/zt/08/08zkzt/index.html#anhui">http://www.tl100.com/zhongkao/zt/08/08zkzt/index.html#anhui</a></p> 
		
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        <pubDate>2008-11-16  22:50</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
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        <title><![CDATA[初三阶段学习]]></title>
        <link><![CDATA[http://hi.baidu.com/%B5%E7123456789/blog/item/e61a263e7072e13a70cf6ceb.html]]></link>
        <description><![CDATA[
		
		<strong><font size="4">学生：学会耐压抗挫 <br>
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在初三阶段，一个显著的变化就是&ldquo;三多一少&rdquo;，即课程多，作业多，考试多，休息时间少。除了质检考、模拟考、毕业考和升学考外，小考小测月月有，甚至周周有，天天有，这时同学们难免会有成绩不理想的情况出现，很容易情绪波动，对自己产生怀疑。面对更概括、更抽象、更难于理解的课程学习，面对更激烈、更紧张的竞争环境，要求新上初三的同学树立起一种吃苦意识、学习意识、中考意识，做好承受压力、经受挫折、忍耐寂寞的心理准备。其实，在大考前充分暴露自己的失误是件好事，问题暴露得越多越好，发现了漏洞就及时补上。考试之后，看一下哪些不该丢分的地方丢分了，可以将这些题抄到一个错题本上，将考查重点、易错点用不同颜色的笔勾画出来，反复思考、</font></strong><a style="text-decoration: underline" href="http://www.sogou.com/sogoupedia?query=%C1%B7%CF%B0" target="_blank"><strong><font size="4">练习</font></strong></a><strong><font size="4">。同学们要学会通过反复分析成绩，对自己的学习心中有数。时间要抓紧，心态要平静，不必太过于计较分数和名次。在时间的安排上，要特别讲究效率。千万不能为了复习而突击熬夜，影响第二天的听课质量。 <br>
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初三上学期，老师还会讲新课，听课时一定要紧跟着老师，认真听讲，仔细做笔记，然后及时复习；到了下学期会系统复习，到了这一阶段，由于时间关系，有的地方老师不会讲得非常仔细，同学们在课后还需要自己看书，因此学习的计划性、目的性一定要强，不要搞突击战，听课要讲究效率，在课堂上无论会与否，都要紧跟着老师的节奏，与老师多交流，尤其是有不懂的地方要及时问，不留问题过夜。 <br>
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初三阶段学习任务繁重了，初三一整年始终充满一种紧张的中考气氛，同学们面对较以前更复杂的学习环境往往目不暇接，疲以应付，同学间你追我赶的竞争态势必然会给学生带来压力，难免产生种种心理困惑和交际障碍。因此要对初三学生提前进行&ldquo;耐压&rdquo;和&ldquo;抗挫&rdquo;教育。面对新环境、新变化，同学们一定要有思想准备，并做好相应的心理调适；注意客观分析自己的长处和短处，给自己作出正确的评价，时时激励自己不断向目标努力。还要尽快了解新环境，主动接受新环境，使自己尽量融入集体，多交一些朋友。总之，同学们要以自信、宽容的心态，尽快适应学习上的种种竞争。 <br>
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家长：心态要放平 <br>
<br>
心理专家发现，现在，毕业恐惧症已经&ldquo;传染&rdquo;给了家长，孩子临近中考，一些家长开始失眠、焦虑，甚至全身不舒服。家长们的这种表现，主要还是来自对孩子的过度保护和对孩子学习成绩好坏的过分紧张。家长们的紧张心理对孩子初三的学习生活是十分不利的。要想让孩子远离心理压力，家长的心态首先要放平。 <br>
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家长应该主动把孩子升学的压力分担出去，该让孩子承担的就让孩子去做，不需要家长太过操心的，请别放在心上。相信自己的孩子。每一个孩子都是很有潜力的，家长包办一切的做法不仅家长受累，孩子也不快乐。家长们还应从心理上对升学有一个正确的认识，初三生活对孩子来说是一次全新的锻炼，会充满很多成长的快乐。家长要知道，自己调整好心态对孩子会有很大的积极影响。 <br>
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教师：要以人为本 <br>
<br>
教师要善于改革陈旧、呆板、单调的课堂教学模式，研究和设计科学、活泼、开发型的语文课堂教学模式，革新教法，重启发不包办，多讨论少讲授，多对话少问答，重过程重积累，努力激发学生的学习兴趣和问题意识。 <br>
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教学无定法，但教学必须得法。所谓&ldquo;得法&rdquo;，主要是指通过教师在一段时间的教学之后，学生能获得具体而实在的进步。这就需要教师具有一种反思的意识，要求每一个教师不断反思自己的日常教学行为，持续追问自己：&ldquo;什么样的教学才是有效的？&rdquo;、&ldquo;我的教学有效吗？&rdquo;、&ldquo;我的教学方法合适吗？&rdquo;、&ldquo;有没有比我现在更有效的、更适合学生的教学方法？&rdquo;一切都要以学生为本。<br>
</font></strong> 
		
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        <pubDate>2008-11-16  22:40</pubDate>
        <category><![CDATA[默认分类]]></category>
        <author><![CDATA[电123456789]]></author>
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