改英语句子 我觉得难
题目
改英语句子 我觉得难
1、It's behind a door.
2、Lets look at the book on my table.
3、Li Jun,Li Ping and Jack all are in the classroom
答案
it's behind the door
let's look at the book on my table
li jun,li ping and jack are all in the classroom
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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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