单项选择题
Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.
A.the CO2 being inhaled by personnel B.reflash of burning liquids C.vapor condensation on the extinguisher D.the discharge causing a static spark
单项选择题 Overhauling a fire in the living quarters on a vessel must include（）.
单项选择题 Operation of the valve control release on a fixed CO2 system must immediately（）.
单项选择题 One of the limitations of foam as an extinguishing agent is that foam（）.
