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问题

One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and


One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the ________.

A.crankcase

B.cylinder head

C.valve cover

D.engine frame.

请帮忙给出正确答案和分析,谢谢!

参考答案
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