Are you happpy with your English的英语作文怎么写?70词
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Are you happpy with your English的英语作文怎么写?70词
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Are you happy with your EnglishAs we know,English is an international language.So we are learning English now.If you ask me whether or not I am happy with my English,the answer to this question is yes...
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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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