I want to know how long _______? A. has he been back B he has been back
题目
I want to know how long _______? A. has he been back B he has been back
I want to know how long _______.
A. has he been back B he has been back
哪个啊 为什么
I didn't know how _____ to London?
A would they go C they would go
答案
分别是B C
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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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