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單項(xiàng)選擇題

To determine that a compartment contains sufficient oxygen to sustain life, you should use a/an （）.

A.explosimeter
B.oxygen indicator
C.fresh air indicator
D.all of the above

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單項(xiàng)選擇題

An oxygen indicator will detect （）.

A.concentrations of explosive gas
B.an oxygen deficiency in a space
C.the presence of harmful amounts of carbon monoxide
D.All of the above

單項(xiàng)選擇題

The term "oily mixture", as defined in the Pollution Prevention Regulations includes （）.

A.sludge
B.oily ballast water
C.bilge slops
D.All of the above

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