关于一篇 A story的英语作文··
题目
关于一篇 A story的英语作文··
150字左右·
初中水平···
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Once in the ancient Kingdom of Zheng there was a man who wanted to buy himself a pair of shoes. He took the measurement of his own feet with a piece of string.Then he went to themarket. He was looking...
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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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