Put your book on your desk改为否定句
题目
Put your book on your desk改为否定句
Here's a recipe fpr sandwich 【改为复数形式】
3 I want【 two 】slices of break 【对括号部分提问
答案
Don't put your book on your desk.
Here are recipes for sandwiches.
How many slices of bread do you want?
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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