<img alt="" src="https://learnfile.20230611.cn/learnAppQuestion/

分类: 专业案例(暖通空调专业) 发布时间: 2023-11-03 01:21 浏览量: 0

A.18.25Pa

B.20.25Pa

C.21.25Pa

D.22.79Pa

正确答案是D