单项选择题
Which of the listed classes of fire would most likely occur in the engine room of a vessel?（）
A.Classes A and B
B.Classes B and C
C.Classes C and D
D.Classes A and D
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单项选择题
If ignited, which of the listed materials would be a class "B" fire?（）
A.Magnesium
B.Paper
C.Wood
D.Diesel Oil -
单项选择题
Which statement concerning the collection of fresh water is FALSE?（）
A.Fresh water may be obtained from fish
B.lifeboat covers or canopies should be washed with rain before drinking water is collected
C.Fresh water may be collected from condensation inside the life-raft
D.Freshwater cannot be produced from standing seawater -
单项选择题
The class of fire on which a blanketing effect is essential to extinguish the fire is （）.
A.class A
B.class B
C.class C
D.class D
