Tom bought a book for Tim.同义句
题目
Tom bought a book for Tim.同义句
Tom bought a book for Tim.
A thief stole a wallet from a lady.
答案
Tom bought a book for Tim.= Tom bought Tim a book.(buy sth for sb= buy sb sth)A thief stole a wallet from a lady.=A thief stole a lady a wallet.(steal sth from sb= steal sb sth)
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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