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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:193

Bluetooth is a radio-technology allowing cell phones, wireless earphones, etc. to ______ radio signals, so that people can contact each other within 10 metres.

A.match B.share
C.protect D.exchange
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Bluetoothisaradiotechnologyall