單項(xiàng)選擇題Seawater may be used for drinking water ().

A.at a maximum rate of two ounces per day
B.after mixing with an equal quantity of fresh water
C.if gather during or immediately after a hard rain
D.under no circumstance


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1.單項(xiàng)選擇題A class "D" fire would be considered as burning ().

A.wood
B.oil
C.electrical equipment
D.magnesium

2.單項(xiàng)選擇題One of the methods NOT usually allowed in cleaning up oil spills in the United States is ().

A.skimmers
B.straw
C.dispersants
D.sawdust

3.單項(xiàng)選擇題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

4.單項(xiàng)選擇題If ignited, which of the listed materials would be a class "B" fire?()

A.Magnesium
B.Paper
C.Wood
D.Diesel Oil

5.單項(xiàng)選擇題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