单项选择题
A.Pump only if the discharge is led to a shore tank or barge
B.Pump only during the hours of darkness
C.Pump only on the outgoing tide
D.Pump only as much as is necessary
单项选择题 You are about to enter a compartment to investigate a suspected smoldering fireIf youre not wearing a self-contained breathing apparatus, you should test the compartments atmosphere to determine if there is/are （）.
单项选择题 Fire prevention during welding or burning aboard any vessel should include （）.
单项选择题 The vapors given off by heated fuel oil are flammable, explosive, and （）