you should return all books to the information desk and wait until your books have been comoletely c
题目
you should return all books to the information desk and wait until your books have been comoletely checked in by the staff working at the counter.
答案
你必须把所有的书都还给信息台,等到台前的工作人员把所有的书都登记以后才能走
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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