I enjoy helping others的英语作文快告诉我把,
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I enjoy helping others的英语作文快告诉我把,
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1.After class,the students to play on the ground,the playground is lively,skip,some classmates have play hide-and-seek,some.June day face - boy says to change,suddenly the size of the rain,the playgro...
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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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