新概念英语第二册第四十一课全文
题目
新概念英语第二册第四十一课全文
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Do you call that a hat ' I said to my wife.'You needn't be so rude about it,' my wife answered as she looked at herself in the mirror.I sat down on one of those modern chairs with holes in it and wait...
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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