英语作文 60词
题目
英语作文 60词
写一篇（我家乡20年以后的变化）至少60词 尽量少些
答案
My hometown is in a city which is not very large.There are not any high buildings,and the streets are not very wide.But it is really beautiful with lots of hills and lakes. The climate is very suitabl...
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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