the advantages and disadvantages of hosting the Olympic Games 的作文
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the advantages and disadvantages of hosting the Olympic Games 的作文
答案
The 2008 Olympic Games has been held in Beijing,where many sportsmen and sportswomen from the countries all over the world assembled.As everyone knows,holding the Olympic Games is more than a great ho...
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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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