800m≤R

分类: 高速铁路考试题库1 发布时间: 2023-12-01 12:13 浏览量: 0

800m≤R

A.50m,30mm,20mm

B.50m,40mm,20mm

C.50m,40mm,30mm

D.50m,30mm,15mm

正确答案是B