第10套
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。 
(1) A.2.45GHZ B. 4.45GHZ C. 2.95GHZ D. 1.45GHZ 
(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