a plan a day out
题目
a plan a day out
答案
I am a boy from Henan Procince.This winter holiday I came to Hangzhou to play.When I see the city ,I was surprised by the beatiful view of Hangzhou.The city is very clean ,the people are very friendly.Especially the West Lake,it is my paradise in the world!The green water and the sweet flowers make me feel relax.I love Hangzhou so much.If I have one more chance,I will come here again.
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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