on making friends例文
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on making friends例文
答案
Everyone needs friends,and if you fail to make friends,you should examine yourself and see if there is something wrong with your personality.May be you have social faults such as snobbishness,talkativ...
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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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