单项选择题
The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.
A.principle
B.principal
C.cause
D.case
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相关考题
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单项选择题
The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the （） cycle.
A.two-stroke
B.four-stoke
C.long-stroke
D.short-stroke -
单项选择题
The main moving parts of a diesel engine consist of the （） and the pistons.
A.bedplate, connecting rods
B.crankshaft, the connecting rods
C.frames, crossheads
D.crankshaft, the cylinder -
单项选择题
The main function of the lubrication system in to enable （） of a film of oil between the moving parts.
A.the information
B.the formation
C.the scatter
D.the friction
