this is my eraser.(改为一般疑问句) Is it a pencil?(做肯定回答)
题目
this is my eraser.(改为一般疑问句) Is it a pencil?(做肯定回答)
this is my dictionary.(改为否定句形式)
It's a pencil.(对a pencil提问）
my teiephone number is 5554327.（对号码提问）
( )
It’s a sharpener.（根据回答写问题）
答案
Is this your eraser?
Yes,it is.
This is not my dictionary.
What is this?
What is your teleplone number?
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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