A、A.operational
B、B.open
C、C.closed securely
D、D.at middle position
更多“When stand-by engine instructions have been received, it’s necessary to make it sure that all valves in the various systems are（）”相关的问题
A、the main engine in the stand-by condition B、auxiliary machinery in the stand-by condition C、dynamical equipments in the stand-by condition and could be used immediately D、A and B
A、If the first stand-by set failed B、If the first stand-by set fails C、If the first stand-by set will fail D、If the first stand-by set doesn’t fail
A、engine room logbook B、voyage logbook C、engine room logbook or voyage logbook D、engine room logbook and voyage logbook
A、to get the engine ready B、to respond to the engine C、to maneuver the engine D、to change the engine
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