长城的英文简介
题目
长城的英文简介
中英文都要,不太长也不太短.
答案
The Great Wall of China is a series of fortifications made of stone,brick,tamped earth,wood,and other materials,generally built along an east-to-west line across the historical northern borders of Chi...
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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