[单选题]在制造技术和维护管理技术落后于船舶的技术发展时,船舶磨合期甚至可能延长至()。
正确答案 :D
1—2年
[单选题]If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the ().
正确答案 :A
cylinder compression pressure may not be high enough
[单选题]What is the function of the thrust bearing?()
正确答案 :B
Transmits propeller thrust to the hull
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