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?（）
单项选择题 Which of the following equipment is for body protection?（）
单项选择题 Which of the following equipment is for hand and foot protection?（）
