You must take good care of yourself when you are out的同义句
题目
You must take good care of yourself when you are out的同义句
答案
You must look after yourself well when you aren't at home.
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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