用my, your,his,her.写一段简单的对话
题目
用my, your,his,her.写一段简单的对话
...
答案
A:Hi,they are my friends.His name is B,and her name is C.
B:What's your name?
D:My name is D.Nice to meet you.
B&C:Nice to meet you too.
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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