单项选择题
The heart of the diesel engine is the （） where the fuel is burnt and the power developed.
A.crankcase
B.cylinder
C.scavenge box
D.piston
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The hand steering is a method by which the motion of the rudder is controlled with （）.
A.a motor-driven steering wheel
B.a pneumatic steering wheel
C.a hand-driven steering wheel
D.an electric steering wheel -
单项选择题
The gudgeon pin is carried in （） in the piston skirt.
A.the bearing
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The governor of a generator engine is to （）.
A.make the engine stop
B.regulate the timing of camshafts
C.make the rpm stabilize at any required value
D.make the engine run at nearly constant speed
