驼缓信号工单项选择题每日一练(2019.04.25)

A.10
B.12
C.15
D.20

A.0.9
B.0.95
C.0.8
D.0.85

A.1
B.2
C.3
D.4

A.2~5
B.3~8
C.5~10
D.10~30

A.126±8
B.129+5
C.126±4
D.126+4