Everyone needs friends .We all like to feel close to someone .It is nice to have a friend to talk
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Everyone needs friends .We all like to feel close to someone .It is nice to have a friend to talk
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每个人需要朋友,我们都喜欢互相亲近,有一个朋友聊天是美妙的
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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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