单选题 1分

Power is supplied through ___to larger auxiliaries at the __voltage

  • A.circuit breakers , low
  • B.circuit breakers, high
  • C.Exciters , low
  • D.Exciters ,high

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  • B.10 volts, the output changes 5 volts
  • C.2 volts, the output changes 10 volts
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  • A.circuit breakers , low
  • B.circuit breakers, high
  • C.Exciters , low
  • D.Exciters ,high