单选题A ground in an electrical circuit outside the engine room （）.Acannot be detected tinder normal conditionsBis of no consequence to engineering personnelCis indicated at the branch circuit breaker panelDis indicated by the ground detecting lamps on the main switchboard
单选题
A ground in an electrical circuit outside the engine room （）.
A
cannot be detected tinder normal conditions
B
is of no consequence to engineering personnel
C
is indicated at the branch circuit breaker panel
D
is indicated by the ground detecting lamps on the main switchboard
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