单项选择题
（）is best for electrical fire.
A. Dry extinguisher
B. Power extinguisher
C.A+B
D. CO2 extinguisher
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Which of the following is not the emergency equipment?（）
A. Emergency power supply.
B. Quick-close device.
C. Emergency squad.
D. derricks. -
单项选择题
Which of the following is not the life-saving equipment? （）
A. Lifeboat.
B. Life-raft .
C. Life rail.
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What would you do if hearing an abandon ship alarm? （）
A. Put on my life-jacket.
B. Go to muster station.
C. A+B
D. Rig the lifeboat and report.
