1：Scott grow a beard during the trip .对during the trip 画线提问
题目
1：Scott grow a beard during the trip .对during the trip 画线提问
2：Who‘s this?Can you guess?合并成一句
3：His friend can hear nothing 变反义疑问句
答案
When did Scott grow a beard?
Can you guess who this is
His friend can hear nothing,can't he?
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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