单项选择题

A fixed CO₂ system on a ship with a capacity of over 300 lbs (136 kilograms) CO₂ which protects spaces other than tanks must have（）.

A.two or more releasing stations
B.automatic release in event of a fire
C.an audible alarm and time delay
D.an audible and visible alarm

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单项选择题

A.stop the ventilation
B.sound the general alarm
C.determine the source of the fire
D.attempt to extinguish the fire

单项选择题

A.low-velocity fog only
B.a solid stream only
C.a solid stream and foam
D.a solid stream and fog

单项选择题

A.reading the gage pressure
B.weighing the extinguisher
C.discharging a small amount of CO₂
D.seeing if the seal has been broken

A fixed CO2 system on a ship with a capacity of over 300 lbs (136 kilograms) CO2 which protects spaces other than tanks must have（）.