You must think it over before you decide to his offer.
题目
You must think it over before you decide to his offer.
It is known to us that the blue sky
equally us all.
Attempts are being made to of pollution.
It is clear that emotions our physical health.
从as a resultof come from solve the problem turn down get used to belong to all over the world be closely related to 选择并用适当形式填入空白处
答案
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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