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
单项选择题 Which one is not the personal safety equipment?（）
单项选择题 Water is a very effective fire extinguishing agent because it（）
单项选择题 A large oil fire is best extinguished with（）
