单项选择题
A. great care B. some measures C. fresh water D. fresh air
During a fire drill on a vessel, what action is require...
单项选择题During a fire drill on a vessel, what action is required？（）
A. Start each fire pump B. Launch and run a lifeboat C. Inspect fire hoses D. Close each fire pump
（）are used for lifesaving .A. Life-jacket and lifebuoyB...
单项选择题（）are used for lifesaving .
A. Life-jacket and lifebuoy B. Freeboard C. Telemeter D. Draft
Oil fires are best extinguished by （）.A. cutting off th...
单项选择题Oil fires are best extinguished by （）.
A. cutting off the supply of oxygen B. removing the fuel C. spraying with water D. adding oxygen
