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As an experienced technician, you are


As an experienced technician, you are responsible for Technical Support. A customer calls to ask the best signal level and noise level for cell phone. How to respond?()

  • A -40dBm signal and -90dBm noise
  • B -50dBm signal and -90dBm noise
  • C -30dBm signal and -90dBm noise
  • D -20dBm signal and -90dBm noise
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