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單項選擇題

Which letter means that oil-spilling has happened?（）

A.P
B.O
C.S
D.G

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單項選擇題

（）is best for electrical fire.

A. Dry extinguisher
B. Power extinguisher
C.A+B
D. CO₂ extinguisher

單項選擇題

Which of the following is not the emergency equipment?（）

A. Emergency power supply.
B. Quick-close device.
C. Emergency squad.
D. derricks.

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