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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

（） shall be continuously powered and shall have an automatic changeover to a stand by power supply in case of loss of normal power supply.

A.Cooling system
B.Alarm system
C.The air conditioning installation
D.The mooring equipment

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