单项选择题
A.≥0.5MPa B.≥0.6MPa C.≥0.7MPa D.≥0.8MPa
A.2s B.3s C.4s D.5s
A.0+钩车总轴数×5% B.0+钩车总轴数×8% C.1+钩车总轴数×5% D.1+钩车总轴数×8%