单项选择题
To prevent the spread of fire by conduction you should（）.
A.cool the bulkheads around the fire B.remove combustibles from direct exposure C.close all openings to the area D.shut off all electric power
单项选择题 To lubricate the swivel or remove corrosion from a fire hose coupling，you should use（）.
单项选择题 To determine if a CO2 fire extinguisher is fully charged，you would（）.
单项选择题 There is a fire in the crew’s quarters of your vessel. You should（）.
