单项选择题
Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.
A.closing the compartment except for the ventilators B.completely closing the compartment C.leaving the compartment open to the air D.increasing the air flow to the compartment by blowers
单项选择题 Fire hose should be washed with（）.
单项选择题 Fire hose couplings（）.
单项选择题 Fire fighting equipment requirements for a particular vessel may be found on the（）.
