单项选择题
A.警报 B.演示 C.控制 D.信号
关闭防火门（）A. open fire doorsB. close fire doorsC. put on f...
单项选择题关闭防火门（）
A. open fire doors B. close fire doors C. put on fire doors D. put off fire doors
抛救生圈（）A. release a lifebuoyB. release a life-jacketC. r...
单项选择题抛救生圈（）
A. release a lifebuoy B. release a life-jacket C. release a lifeboat D. release a life-raft
发警报（）A. sound alarmB. make alarmC. send alarmD. receive...
单项选择题发警报（）
A. sound alarm B. make alarm C. send alarm D. receive alarm
