ssat 测试题
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ssat 测试题
谁有ssat模拟题,
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Many great inventions are greeted with ridicule and disbelief.The invention of the airplane was no exception.Although many people who heard about the first powered flight on December 17,1903,were exci...
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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