it is generally-accepted that many English-speaking cultures are among the richest and most dynamic
题目
it is generally-accepted that many English-speaking cultures are among the richest and most dynamic cultures in the world. 什么意思
答案
人们普遍认为,以英语为母语的文化通常位列世界上最丰富也最有活力的文化之一.
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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