单项选择题
A. Release a life-jacket and help him come on board. B. Releasing lifebuoy and help him come on board. C. Throw him a lifebuoy and help him come on board. D. Release a life-raft and help him come on board.
A. Close all fire doors and use the dry powder extinguisher. B. Close all fire doors and use the foam extinguisher. C. Close all fire doors and use the CO2 extinguisher. D. Close all fire rooms and use the dry powder extinguisher.
A. Sound the bell immediately. B. Sound the alarm immediately. C. Ring the alarm immediately. D. Ring the bell immediately.