写大学友谊的英语作文,80个字
题目
写大学友谊的英语作文,80个字
RT
答案
Friendship during our colledge is much more important than any other period of our life.First,it’s a good time for us to make as many friends as we could to form a concrete contact net for our future...
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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