There was a story many years ago of a school teacher--- Mrs.Thompson.She told the children on the fi
题目
There was a story many years ago of a school teacher--- Mrs.Thompson.She told the children on the first day that she loved them all the same.But that was a lie.
答案
这个故事是关于许多年前的一个老师----辛普森夫人.她在第一天就告诉她班上的孩子们她爱每一个人,但是那是一个谎言.
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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