are your desks made of wood肯定句怎回答?否定句又是怎样回答?
题目
are your desks made of wood肯定句怎回答?否定句又是怎样回答?
答案
Yes,they are ( made of wood).
No,they are not ( made of wood).
括号里面的一般省略.
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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