单项选择题

Oil fires are best extinguished by （）.

A. cutting off the supply of oxygen
B. removing the fuel
C. spraying with water
D. adding oxygen

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单项选择题
You will extinguish a fire when you remove （）.

A.oxygen
B.carbon dioxide
C.H2O
D.H2
单项选择题
I’m on fire and have dangerous cargo on board. The most urgent assistance (最紧急的援助)in this case would be（） .

A.lifeboat
B.medicine
C.firefighting
D.lifesaving
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