if you fall into the water and can swim ,they may come up to help you
题目
if you fall into the water and can swim ,they may come up to help you
答案
if you fall into the water and can't swim ,they may come up to help you
如果你掉入水中并且不会游泳,他们会上前去救你
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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