新目标初二英语上册58页2作文
题目
新目标初二英语上册58页2作文
答案
Deng Yaping was born on February 6th.1973.She started to play table tennis in 1978.In 1983,s-he joined the Henan table tennis team.She joined the national table tennis team.In 1988,she went to Tsinghu...
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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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