英语话题作文：你到过什么地方?你对他有什么深刻的印象?
题目
英语话题作文：你到过什么地方?你对他有什么深刻的印象?
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I have been to Kunming.It was three years ago.I went to Kunming with my parents by plane.Kunming is a beautiful city with lots of trees and flowers.We went to climb the West Mountain,visited the Stone Forest and the Flower Market.We also tasted the famous Crossing Bridge Noodles.People there were friendly and kind to us.We really enjoyed ourselves.
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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