我最喜欢的动物70字英语作文
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我最喜欢的动物70字英语作文
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If you ask me what my favourite animal.I can tell you pandas are my favourite.I like the pandas not only because they are one of the China's treasures,but also because they looks cute.Pandas are very ...
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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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