,.Have you ever decided whether to go shopping or stay home watching TV on a weekend ?Now you can do
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,.Have you ever decided whether to go shopping or stay home watching TV on a weekend ?Now you can do both at the same time .急求以此为开头的短文
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Have you ever decided whether to go shopping or stay home watching TV on a weekend Now you can do both at the same time.As the development of Internate,more and more people like surffing on line.It is...
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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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