單項選擇題

An aneroid barometer is an instrument（）.

A.used to measure the speed of wind
B.in which the pressure of air is measured
C.that tells which dirction a storm is coming from
D.used to measure the height of waves

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單項選擇題

An emergence sea anchor may be constructed by type of extinguisher?（）.

A.a boat bucket
B.an air tank filled with water
C.an oar and canvas weighted down
D.All of the above

單項選擇題

An engine compartment gasoline fire requires which type of extinguisher?（）.

A.Carbon dioxide
B.Dry chemical
C.Foam
D.All of the above