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1 his mother was (s ) ill last night 2 xie kai has a very good relationship with his classmates ,because he is (e ) 3 she (w ) in a hospital.she is a doctor 4 do you kbow the woman (w ) long,blond ,curly hair?5 brown is a member of our basketball team.he is also the (c ) of our basketball team.6 i like traditional (p ) by qi baishi ,xu beihong and so on
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suddently easy-going works with chief painting
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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