That‘s a ruler.(改为一般疑问句) Is this your book?(作回答) It is my ID card(改为否定句)
题目
That‘s a ruler.(改为一般疑问句) Is this your book?(作回答) It is my ID card(改为否定句)
答案
Is that a ruler?
Yes,it is.
No,it isn't.
It isn't my ID card.
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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