单项选择题
Fixed CO2 systems would not be used on crew’s quarters or（）.
A.the paint locker B.spaces open to the atmosphere C.cargo holds D.the engine room
单项选择题 Firefighting foam is only effective when the foam（）.
单项选择题 Fire may be spread by which means?（）.
单项选择题 Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.
