The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by （）.

A、A.large conical springs

B、B.compressed air pressure

C、C.hydraulic pressure

D、D.exhaust gas pressure

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第1题

[单选题] Which ofem> theem> listed operations will cause an automatically controlled refrigeration compressor to restart?（）

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第2题

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A、shut B、closingem> C、opened D、closed

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第3题

[单选题] Which ofem> theem> following layers ofem> theem> TCP/IP model most closely corresponds to theem> network layer ofem> theem> OSI model?（）

A、Application B、Internet C、Transport D、Network E、Data Link

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第4题

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第5题

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第6题

[单选题] All theem> following is true except that（）.

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