單項選擇題Governors are equipped with motors for synchronizing, load sharing and frequency control（）
A.speed setting
B.load setting
C.speed changing
D.load changing
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1.單項選擇題In engines with system, the lubricating oil can be added to the engine through the filling hole in the crankcase cover, by using a hand oil can, or through the separator pipe（）
A.lubricating oil
B.dry sump
C.circulated tank
D.wet sump
2.單項選擇題Main engines as well as auxiliary engines operating on heavy fuel should have continuous on the lubricating oil, either according to the bypass or batch principles（）
A.filtering
B.centrifuging
C.depositing
D.operating
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