单项选择题
A.lifejacket B.SCBA C.lifeboat D.torch
Which one is not the personal safety equipment?（）A.Life...
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
Water is a very effective fire extinguishing agent beca...
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
A large oil fire is best extinguished with（）A.soda acid...
单项选择题A large oil fire is best extinguished with（）
A.soda acid B.foam C.CO2 D.sand
