把这些句子改成复数形式：1、where is the newspaper?2、is there a child in the room?
题目
把这些句子改成复数形式：1、where is the newspaper?2、is there a child in the room?
3、is that person your friend?
4、who is that woman?
答案
1、where are the newspaper?
2、Are there children in the room?
3、Are those person your friends?
4、who are those women?
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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