根据答句,用合适的疑问句或词组补全对话.
题目
根据答句,用合适的疑问句或词组补全对话.
1.（） is the poster abut?
About our Earth.
2.( ) modules are there in the book?
There are five.
3.( ) can you stop the sandstorm?
We can plant trees to stop the sandsorm.
4.( ) can I find these photos?
In this book.
5.( )are trees important to us?
Because they provide us with a lot of things.
答案
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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