A.cool B.heat C.hot D.warm
单项选择题The fire-fighting ()is ready.
A.party B.part C.crew D.members
单项选择题Cargo in hold No.2 is on() .
A.water B.oil C.fire D.A+B
单项选择题CO2 and Halon extinguishers are used for electrical fire, as well as ()fire.
A.common B.oil C.electrical D.chemical
单项选择题Lifeboat launching is operated at intervals of ()months.
A.one B.two C.three D.four
单项选择题Fire drill is carried out once a ().
A.year B.day C.week D.month