A.休息時(shí) B.值班時(shí) C.執(zhí)行職務(wù)時(shí) D.站臺(tái)上或列車上
A.18h B.20h C.12h D.15h
A.5∶00~8∶00 B.6∶00~8∶00 C.5∶00~9∶00 D.5∶00~11∶00