-
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
-
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
-
单项选择题
发警报（）
A. sound alarm
B. make alarm
C. send alarm
D. receive alarm
