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<description>自然科学 /  / 数学</description>
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<item>
    <title>笨人俱乐部 </title>
    <link>http://kdata.cn/html/natural_science/maths/20071013/50301.html</link>
    <description>一九二九年，美国堪萨斯州成立了一个笨人俱乐部。读者切莫以为这个俱乐部的成员真的是什么天生的白痴、笨蛋。不是的！他们都是社会上的绅士。他们搞出笨人俱乐部这个新花样，只不过说明他们精神空虚而无所寄托罢了。 这个俱乐部的会章规定：只有称得上最没有用的人，才</description>
    <pubDate>2007-10-13</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>三个A</title>
    <link>http://kdata.cn/html/natural_science/maths/20071013/50300.html</link>
    <description>在下列乘法算式中，每个字母代表0-9的一个数字，而且不同的字母代表不同的数字： ASA MAN A代表0～9中的哪一个数字？ 三个A（答案） A不能是0，否则M和N也都等于0。 A不能是1，因为乘积与AS不同。 A不能是2，因为这样乘积就不会是三位数。 A不能是3，</description>
    <pubDate>2007-10-13</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
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<item>
    <title>这是不可避免的错误吗？</title>
    <link>http://kdata.cn/html/natural_science/maths/20071013/50299.html</link>
    <description>有一个采购员，利用工作方便，以试用样品为名，收取了别单位大量新产品。后来，发展到受贿。组织上发觉以后，要他检查交代。他却说；同志们不是常说，工作中的错误、缺点是不可避免的吗？我的这些错误恰好都是在工作中犯的，我是为了搞好工作，搞好关系，才犯这些</description>
    <pubDate>2007-10-13</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>内涵和外延</title>
    <link>http://kdata.cn/html/natural_science/maths/20071013/50298.html</link>
    <description>connotation and denotation；intension and extension 逻辑学术语。 传统逻辑认为，词项的内涵是它的含义即概念，是事物的特有属性的反映。词项的外延是词项所指的事物所组成的那个类。近代作为逻辑教本之一的《波尔-罗亚尔逻辑》，第一次提出了内涵和外延的区别。后</description>
    <pubDate>2007-10-13</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>小学五年级数学</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50246.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>小学奥数（要写过程）</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50245.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>小学五年级数学应用题</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50244.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>数学题？</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50243.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>初中几何</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50249.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>小学奥数题</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50248.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>(1+3+5+...+99)-(2+4+6+...+998)</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50247.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>一直长方体的长宽高之和为1，全面积为16/27，设长方体的高为x,邱长方体的体积V,V(x)的解析式</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50254.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>数学，不用方程，详细解答，谢谢。</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50253.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>数学几何题</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50252.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>3.{y=x+m,y=√(4-x^2)有2个不等实根，求m;</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50251.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>请教一个不等式</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50250.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>我有道数学题不会做,请大家帮帮我.</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50258.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>一道几何题,求教高手</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50257.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>请教一道微分计算?</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50256.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>因式分解3题求解</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50264.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>一道数学题</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50263.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>6年级数学题</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50262.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>……因式分解</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50261.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>309 随机变量分布的证明题~</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50260.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>求和</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50271.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>三角函数问题三</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50270.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>三角函数问题二</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50269.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>三角函数问题一</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50268.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>三角函数</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50267.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>双曲线</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50266.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>三年级数学</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50272.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>307 随机变量函数的分布2~</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50255.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>求解8年级数学题</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50259.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>初中数论证明</title>
    <link>http://kdata.cn/html/natural_science/maths/20071010/50265.html</link>
    <description></description>
    <pubDate>2007-10-10</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>例2没看懂</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49494.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>初一的数学题(关于绝对值的)急!</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49493.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>证明正弦定理</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49492.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>关于概率的问题</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49491.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>二次函数</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49490.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>还是关于概率论与数理统计的问题</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49489.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>三角函数计算题</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49488.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>求函数的最小值</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49487.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>求函数的值域2</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49486.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>求函数的值域1</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49485.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>数学统计的问题</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49484.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>小学三年数学</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49483.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>线性无关解的问题~</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49482.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>四个指数分别说明什么？</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49481.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>函数问题</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49480.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>数学是自然科学吗？</title>
    <link>http://kdata.cn/html/natural_science/maths/20070721/49479.html</link>
    <description></description>
    <pubDate>2007-07-21</pubDate>
    <category>数学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
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