单项选择题
A.a helment B.safety cap C.an ear plug D.face mask
Which of the following equipment is for protection agai...
单项选择题Which of the following equipment is for protection against hypothermia?（）
A.Safety helmets B.Buoyancy aids C.Breathing apparatus D.Immersion suits
单项选择题Which of the following equipment is for protection against drowing?（）
A.Safety helmets B.Buoyance aids C.Breathing apparatus D.Immersion suits
Which of the following equipment is for body protection...
单项选择题Which of the following equipment is for body protection?（）
A.Safety helmets B.Goggles and sepctacles C.Breathing aparatus D.Safety suits
