帮忙写篇英语作文：Catch up every chance to show ourselves
题目
帮忙写篇英语作文：Catch up every chance to show ourselves
答案
There is no census of opinions among people as to the view of opporunity.Some people suggest that portunities are rare,and only the luckiest can get them,while some other people argue that in a sense ...
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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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