What is the matter with your friend?怎么改成同义句?
题目
What is the matter with your friend?怎么改成同义句?
答案
What's wrong with your friend?
What happened to your friend?
What's your friend's trouble?
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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