单项选择题X 纠错
A.MULTIMETER B.REMOTE C.EMERGENCY D.PHASE
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单项选择题
A.RELAY B.REMOTE C.RESISTANCE D.CURRENT
A.CABLE B.BATTERY C.GENERATOR D.LOCAL
A.CURRENT B.INSULATION C.REMOTE D.OUTPUT
A.AUTOMATIC B.CONST C.RESISTANCE D.MANUAL
A.FREQUENCY B.CURRENT C.VOLTAGE D.CABLE
A.MANUAL B.AUTOMATIC C.CATHODE D.AUDIO
A.CONTACTOR B.TRANSFORMER C.RELAY D.SWITCH
A.RESISTANCE B.CONTACT C.MOTOR D.ALARM
A.CONTACTOR B.INSULATION C.RELAY D.TRANSFORMER
A.ALARM B.CABLE C.BATTERY D.CURRENT
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