单选题The booster pump, which supplies diesel oil to（） , should have a possibility of being powered by compressed air or by emergency power.Athe main enginesBthe auxiliary enginesCthe emergency generator engineDthe auxiliary engines and the main engine(s)
单选题
The booster pump, which supplies diesel oil to（） , should have a possibility of being powered by compressed air or by emergency power.
A
the main engines
B
the auxiliary engines
C
the emergency generator engine
D
the auxiliary engines and the main engine(s)
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