校園警告牌示
Bluetooth - Wikipedia, the free encyclopedia這學校的學生是羊嗎....? Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz[3]) from fixed and mobile devices, and building personal area networks (PANs). Invented by t...
全文閱讀