正确答案: D
12/无限航区
题目:根据我国《海船船员发证规则》规定,持有沿海航区轮机部船员适任证书并实际担任其职务满______个月者,可跨航区申请______相同船舶等级和职务的适任证书。
解析:D
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举一反三的答案和解析:
[单选题]系统进行了一个过程后,如能使( )沿着与原过程相反的方向恢复初态,则这样的过程为可逆过程。
系统和外界
[单选题]Pitted reduction gear teeth having a deep blue color with evidence of overheating have been operated with _______.
inadequate lubrication
[单选题]Each cylinder liner on the marine medium speed engines _____.
can be replaced when worn out
[单选题]The objectives of the ISM Code are to ensure ①safety at sea②prevention of human injury or loss of life③avoidance of damage to the marine environment and to property
①②③
[单选题]心绞痛病人舌下含服硝酸甘油______可以止痛。
1—2分钟内