The Sports Activities I Like Best的书面表达（不少80字）
题目
The Sports Activities I Like Best的书面表达（不少80字）
答案
Of all the sports,I like table-tennis best.I think it is not only a sport but also an art,because it is a game that needs strength and skill.Some people think that playing table-tennis needs little st...
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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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