Ｂluetooth is a universal radio interface in the __(1)__frequency band that enables portable electronic devices __(2)__ connect and communicate __(3)__via short range,ad hoc net Works .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 th support of Nokia,IBM,Toshiba,Intel and many other manufactures,eliminates ths need for wires,cables and connectors for and between cordless or mobile phones,modems,headsets,PDAs,Computers,printers.projectors,local area networks,and so on ,and paves the way for new and completely different devices and applications。
; ]' T6 D3 k, r& Y5 q2 k (1) A.2.45GHZ B. 4.45GHZ C. 2.95GHZ D. 1.45GHZ
( V# J' L1 g7 ?% w (2) A.in B.on C.to D. with
; Y, A# L' J$ p% O V; a8 V' b (3) A.narrowly B.wirelessly C.freely D.widely
: C/ [( m1 J w7 j4 g) y2 H (4) A.use B.sever C.host D. base
0 i. V# V$ w0 M (5) A.relate B.add C.close D. belong
+ v, w' g* @# v( X! x9 Q! W# T 答案:1:A,2:C,3:B,4:B,5:D |
发表于 2012-8-2 09:11:00
