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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>
</item>
<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>初三化学</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50105.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>金可以与什么物质发生反应?</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50104.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>哪位高手能重新给化学术语“燃烧”准确定义？</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50103.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>化学高高手</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50102.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>氢氯酸就是氯化氢气体溶于水吗,那和盐酸有什么区别</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50101.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>化学电子转移问题</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50100.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>合金是金属晶体吗</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50099.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>Al2O3与NaOH反应可否产生沉淀</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50098.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>关于化学的2个问题</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50097.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>急！！！！！</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50096.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>融沸点的问题</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50095.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>高二化学平衡</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50094.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>化学实验中必须注意的问题</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50093.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>初二化学问题</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50092.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>在常温常压下，用铂作电极，电解CuSO4溶液，通电一段时间后，切断电源，一个电极的质量增加了0.12</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50091.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
</item>
<item>
    <title>用质量均为100克的铜做电极，电解AgNO3溶液，电解一段时间后，两极质量差为28克，此时阳极质量为</title>
    <link>http://kdata.cn/html/natural_science/chemistry/20071002/50090.html</link>
    <description></description>
    <pubDate>2007-10-02</pubDate>
    <category>化学</category>
    <author>秩名</author>
    <comments>科学知识网</comments>
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