单选题During the watch keeping at sea, at appropriate intervals inspection should be made of （）, auxiliary machinery and steering gear spaces by the duty engineer.Athe main propulsion plantBlifesaving jacketsClifeboat engineDstate of emergency generator
单选题
During the watch keeping at sea, at appropriate intervals inspection should be made of （）, auxiliary machinery and steering gear spaces by the duty engineer.
A
the main propulsion plant
B
lifesaving jackets
C
lifeboat engine
D
state of emergency generator
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