填空题

Bluetooth networking transmits data via low-power radio waves between 2. 402 GHz and 2. 480 GHz.

【参考答案】

Y

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填空题

Bluetooth is changing small-area networking into a wireless and automatic connection with no need for user intervention and low need of transmission power.

问答题

凡事均应有信心；2. 没有信心的原因；3. 建立信心是可能的。