单项选择题

Which one might be used most likely in case of a fire?（）

A.lifejacket
B.SCBA
C.lifeboat
D.torch

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单项选择题

Which one is not the personal safety equipment?（）

A.Life jackets
B.Survival at Sea manual
C.lifeboat
D.torch

单项选择题

Water is a very effective fire extinguishing agent because it（）

A.will remove all the toxic fumes from the air
B.has the greatest cooling ability
C.will leave no harmful residue
D.completely removes combustible vapors from the air

单项选择题

A large oil fire is best extinguished with（）

A.soda acid
B.foam
C.CO₂
D.sand