谁有英文小故事,星期天要急用,告一告吧
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谁有英文小故事,星期天要急用,告一告吧
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Not long after an old Chinese woman came back to China from her visit to her daughter in the States,she went to a city bank to deposit the US dollars her daughter gave her.At the bank counter,the cler...
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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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