and did not know her.so he first asked same questions .and one of them was ."how old are you ?"
题目
and did not know her.so he first asked same questions .and one of them was ."how old are you ?"
答案
也不了解她. 所以首先就问一些问题. 他们当中的一个是 ."你多大了?"
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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