What can we do to help reduce light pollution?Your school newspaper is asking students for their
题目
What can we do to help reduce light pollution?Your school newspaper is asking students for their
Ideas.写一篇五句的英语作文
火速!
答案
We can use CFL(Compact fluorescent lamps) lights.Turn off lights whenever you don't need it.
use as less light in your house as possible.
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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