第2套 Bluetooth is a universal radio interface in the (1) frequency band that enables portable celectronic devices (2) connect and communicate (3) via short range,ad hoc networks.Each unit can simultaneously communicate with up to (4) other units per piconet. Moreover,each unit can simultaneously (5) to several piconets,Bluetooth technology which apart from Ericsson,has gained the support of Nokia,IBM,Toshiba,Intel and many other manufactures,eliminates the need for wires,cables and connectors for and between cordless or mobile phones,modems,headsets,PDAs, Computes,printers,progjectors,local ares networks,and so on ,and paves the way for new and completely different devices and applications. (1). A.2.45GHz B. 4.45GHz C. 2.95GHz D. 3.45GHz (2). A.in B. on C. to D. with (3). A.narrowly B.wirelessly C.freely D.widely (4). A.use B.sever C.host D.base (5). A.relate B.add C.close D.belong 答案:1:A,2:C,3:B,4:B,5:D
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