单项选择题
A.mineral oil
B.machinery oil being transferred for shipboard use
C.crude oil unrefined
D.normal bilge oil and water
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 （）
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?（）