如何用be scared to death of dogs 造对话?
题目
如何用be scared to death of dogs 造对话?
一定要对话,
答案
A:Hi, how are you doing these days?B:Not so good. I saw a car accident yesterday.A:Sorry to hear that, then are you all right?B:I am fine, it is just the dog, who was knocked down while running across...
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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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