住在城市的好处 最好英文 多几个理由
题目
住在城市的好处 最好英文 多几个理由
答案
1.
It's convinient to buy something
2.there are some better educate-agent,better school in the city than that in the county
3.public establishment is more than in the county.
4.It is eazy to study more social experience.
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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