They should be allowed to practice their hobbies as much as they want.
题目
They should be allowed to practice their hobbies as much as they want.
答案
应该允许他们对业余爱好想练多长时间就练多长时间.
他们应该被允许尽可能多的锻炼自己的爱好
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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