改为一般疑问句,并作肯定和否定回答
题目
改为一般疑问句,并作肯定和否定回答
I'm in Grade 1.
You are areworkers.
This is my book.
Tha is an English dictionary.
是You are workers.打错了
答案
What Grade are you in?
What are you?
Whose book is this?
What is this?
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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