单项选择题
The pollution prevention regulations state that slop oil and sludge that result as part of normal fueling operations should be disposed of by （）
A.discharging ashore into the sewer system B.sealing in disposable plastic barrels aboard ship C.discharging into a shore tank or stop barge D.dumping into the ship’s bunker tanks
单项选择题 Which fire fighting agent has the greatest capacity for absorbing heat?（）
单项选择题 Which types of portable extinguisher should you watch for the reflash of the fire?（）
单项选择题 A portable foam fire extinguisher is placed in operation by（）
