单项选择题

（） must know the location as well as the operation of the life-saving and fire-fighting appliances.

A. All officers
B. All engineers
C. All the crew
D. All sailors

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单项选择题
（）should be saved first in an accident.

A. The ship
B. The cargo on board
C. The persons on board
D. The bridge
单项选择题
The emergency alarm is sounded on （）according to master’s order.

A.VHF
B.broadcast
C.radio
D.sextant
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