David was in the police station yesterday morning.(划线提问)
题目
David was in the police station yesterday morning.(划线提问)
答案
划线是那部分呢?
如果是David那就是 who was in the police station yesterday morning?
如果是in the police station 那就是 where was David yesterday morning?
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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