用新概念二前六课的其中十个单词写一篇六十字的英语作文.
题目
用新概念二前六课的其中十个单词写一篇六十字的英语作文.
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答案
My aunt is a friendly person.she is very different from others because she never talk loudly in the public.she is a waiter and she would like to offer people service.Many years ago,her husband died an...
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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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