he gave us some newspapers.jenny always keep her bedroom tidy 被动语态
题目
he gave us some newspapers.jenny always keep her bedroom tidy 被动语态
答案
he gave us some newspapers.
Some newspapers were given to us by him.
jenny always keep her bedroom tidy
Jenny's bedroom is always kept tidy by her.
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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