（） shall be continuously powered and shall have an automatic changeover to a stand by power supply in case of loss of normal power supply.<br>A:Cooling system<br>B:Alarm system<br>C:The air conditioning installation<br>D:The mooring equipment

（） 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

出自：海船船员证

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