How to search for information?
题目
How to search for information?
答案
It depengds.In facct,there are so many access to information that you can hardly figure out how many ways are there.You can either get information online by searching for its key words,or you can exchange your points with others.Besides,information can be reached throw newspapers,news,as well as magzines.
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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