深南大道27年用英语来写一篇短作文
题目
深南大道27年用英语来写一篇短作文
答案
Long ago,ShenNan Road was a small road,there were only some bicycles、cars and some people.There were not some flowers and grass,it was ungry .But now,ShenNan Road become a big road,there are a lot of...
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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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