单项选择题
A.cool B.heat C.hot D.warm
The fire-fighting （）is ready.A.partyB.partC.crewD.membe...
单项选择题The fire-fighting （）is ready.
A.party B.part C.crew D.members
Cargo in hold No.2 is on（） .A.waterB.oilC.fireD.A+B
单项选择题Cargo in hold No.2 is on（） .
A.water B.oil C.fire D.A+B
CO2 and Halon extinguishers are used for electrical fir...
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
