Waste paper shouldn‘t everywhere.It‘s our duty to keep our city clean.
题目
Waste paper shouldn‘t everywhere.It‘s our duty to keep our city clean.
A be thrown B throw C is thrown D are thrown
Do you have any problems if you this job?--Well,I‘m thinking about the working day
A offer B will offered C are offered D will be offered
叫=教一下为什么这样做
答案
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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