单选题In the emergency alarm signals, if the alarm or whistle two long sounds followed by one short sound for 1 minute, it is the （） emergency.Afire fightingBleakage blockingCabandon shipDintegration
单选题
In the emergency alarm signals, if the alarm or whistle two long sounds followed by one short sound for 1 minute, it is the （） emergency.
A
fire fighting
B
leakage blocking
C
abandon ship
D
integration
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