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问题详情

The reason why more and more of the large merchant vessels are being powered by medium-speed diesel engines is （）.

A、they operate between 150 and 450 rpm

B、they are connected to the propeller by gearing

C、their smaller size and weight

D、they can be connected directly to the propeller without gearing

时间：2022-01-06 05:23 关键词：船舶电气与船舶安全

答案解析

C

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