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（） .
单项选择题 CO2 and Halon extinguishers are used for electrical fire, as well as （）fire.
单项选择题 Lifeboat launching is operated at intervals of （）months.
