My neighbourhood 英语作文,不少于50字
题目
My neighbourhood 英语作文,不少于50字
答案
My neighbourhoodMy neighbourhood is very kind.He is friendly to me.He often come to my house and play with me.One day I have some problem and I don't know how to do.At the moment,my neighbourhood help...
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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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