单选题A “dead front” switchboard is one （）.Awithout switches on itBwith insulated switches and no exposed terminalsCwithout circuit breakersDwithout safety hand nails nor rubber mats
单选题
A “dead front” switchboard is one （）.
A
without switches on it
B
with insulated switches and no exposed terminals
C
without circuit breakers
D
without safety hand nails nor rubber mats
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