铁路货车段检修技术知识竞赛单项选择题每日一练(2019.01.17)

A.65°～70°
B.60°～75°
C.65°～75°
D.60°～70°

A.G60
B.G70
C.G75K
D.GQ70

A.45%
B.50%
C.55%
D.60%

A.30
B.40
C.50
D.60

A.12mm
B.16mm
C.20mm
D.24mm