单项选择题
At the required fire drill conducted aboard a vessel，all persons must report to their stations and demonstrate their ability to perform the duties assigned to them（）.
A.by the toolpusher B.in the station bill C.by the person conducting the drill D.at the previous safety meeting
单项选择题 Carbon dioxide as a fire fighting agent has which advantage over other agents?（）.
单项选择题 A ROUND THROUGH THE VESSEL CARRIED OUT BY A CREW MEMBER OF THE WATCH AT CERTAIN INTERVALS SO THAT AN OUTBREAK OF FIRE MAY BE PROMPTLY DETECTED defines（）.
单项选择题 Ordnance exercise is（）.
