单选题（） is (are) not power supplied by main switchboard directly.ASteering gear and windlassBNavigation light and radio power panelCNavigation device power boxDDaily fresh water pump
单选题
（） is (are) not power supplied by main switchboard directly.
A
Steering gear and windlass
B
Navigation light and radio power panel
C
Navigation device power box
D
Daily fresh water pump
参考解析
解析：
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