He gave me a book which is interesting. He gave me the book which is interesting. 哪句对
题目
He gave me a book which is interesting. He gave me the book which is interesting. 哪句对
答案
两句都可以,他给了我一本有趣的书,前一句没有特指,用法肯定是对的,后一句的用法可能是他有好多本书,但是给了我有趣的那一本,所以我觉得两句都没有错
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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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