城市的好处（英文）
题目
城市的好处（英文）
答案
New city, new life.
There are more than thousands of advantage of the city, like it created a huge number of opportunity for work, it made the envoirment became more clear and clean. People in the city are enjoying its convernient transportation, fast communication system. Moreove, people in the city can purchase all kinds of stuffs easily. The city itself brings more chance for commercial development, and boosts the high speed development in economy, finance, logistics, and so on. All in all, the city makes our life better and better.
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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