A.60s/30s B.60s/10s C.30s/10s D.30s/30s
A.1~3min B.3~5min C.5~10min D.10~15min
A.站臺(tái)客運(yùn)人員 B.列車乘務(wù)員 C.機(jī)械師 D.動(dòng)車組司機(jī)