My tao,l love you,miss you every day,though we can not meet,but love each other,however,we will be
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My tao,l love you,miss you every day,though we can not meet,but love each other,however,we will be
My tao,l love you,miss you every day,though we can not meet,but love each other,however,we will be together,love you all long
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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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