so books are the friends of mankind ,is the proqressive step of the human being

分类: 作业答案 • 2021-12-20 09:06:09

问题描述：

so books are the friends of mankind ,is the proqressive step of the human being
什么意思

答

原句有错误
So books are the friends of mankind ,they are the progressive step of the human being.
所以说书是人类的朋友,是人类进步的阶梯.