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單項選擇題

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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單項選擇題

A class "D" fire would be considered as burning （）.

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

單項選擇題

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