单选题Main diesel engine control can be obtained by the bridge （）Aat any timeBonly after the engine room control station is switched to ‘bridge control’Cwhenever the secondary station is switched to ‘bridge control’Dwhenever the engine side control station is switched to ‘bridge control’
单选题
Main diesel engine control can be obtained by the bridge （）
A
at any time
B
only after the engine room control station is switched to ‘bridge control’
C
whenever the secondary station is switched to ‘bridge control’
D
whenever the engine side control station is switched to ‘bridge control’
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