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單項(xiàng)選擇題

Close all fire doors and use the （）（干粉滅火器）.

A. dry powder extinguisher
B. foam extinguisher
C. CO₂ extinguisher
D. portable extinguisher

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單項(xiàng)選擇題

The signals that will be used for emergency should be clearly （）（列出）.

A. put out
B. set out
C. set on
D. put on

單項(xiàng)選擇題

It may be （）（補(bǔ)充）by individual cards issued to each member of the crew.

A.supply
B.supplemented
C.supplied
D.supplies