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题目
beautifully,who,think,the,do,most,you,singsdid,both,a,in,competition,we,good,the,job,dancing
答案
Who do you think sings the most beautifully?
We both did a good job in the dancing competition.
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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