初中英语比赛范文!
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初中英语比赛范文!
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Hello ,everybody.My name's ***,I'm from ***.It's really a fantacy place,people there are very friendly and helpful.There're also some places of interests in my hometown,I love it and hope that you can...
举一反三
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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