單項(xiàng)選擇題Which of the followings will affect the spray of fuel oil?（）
A.coke deposits
B.cylinder water temperature
C.asphalt in fuel oil
D.lub oil
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1.單項(xiàng)選擇題When the direction handle of telegraph is moved, the relative position of camshaft and crankshaft will be（）
A.changed accordingly
B.unchanged
C.positioned ahead
D.positioned astern
2.單項(xiàng)選擇題Which one of the followings may not be checked before engine starting?（）
A.tank level
B.Various filters
C.Drains
D.seawater temperature
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