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

分类: 作业答案 • 2022-01-09 18:03:09

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.