新概念青少版练习册2A答案,
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新概念青少版练习册2A答案,
答案
A1 applied 2 filled 3 paid 4 promised 5 have written 6 have visited 7 have waitedThe writer says"Just give me a ring,"but he hasn't got a telephone!B 1 received 2 lent 3 in my way 4 teacing 5 sold 6 b...
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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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