写一篇 rules around us 的英语作文
题目
写一篇 rules around us 的英语作文
是在图书馆里(library)
答案
In the library,we should not talk very loudly.
And we could not eat or drink in the library,too.
We must give back the books you borrow on time.
If you do it,you will be a good student in the fueture.
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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