单项选择题
（）are used for lifesaving .
A. Life-jacket and lifebuoy
B. Freeboard
C. Telemeter
D. Draft
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Oil fires are best extinguished by （）.
A. cutting off the supply of oxygen
B. removing the fuel
C. spraying with water
D. adding oxygen -
单项选择题
You will extinguish a fire when you remove （）.
A.oxygen
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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
