Re:you
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Re:you
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that is sth for sure definately that's the case!确切的说你对某件事情确信无疑!absolutely you can bet for it exactly quite right you are finally right.你刚开始打赌的就是最后绝对正确的!...
举一反三
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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