通信英语 I单项选择 1.抽样频率 a. sampling rate b. repetition rate c. sampling frequency 答案:c 2.数字通信 a. digital communication b. digital transmission c. transmission th 答案 3.帧格式 a. synchronization word b. frame format c. reverse operation 答案:b 4.噪声功率 a. noisy environment b. signal levels c. noise power 答案:c 5.含噪声的环境 a. signal levels b. noisy environment c. noise power 答案:b 6.模拟信号 a. speech channel b. analog signal c. amplitude value 答案:b 7.脉冲流 a. stream of pulses b. receiving terminal c. terrestrial system 答案 8.传输路由 a. transmission path b. transmission quality c. binary transmission 答案 9.互联网 a. network resource Internet c. interconnected systems 答案:b 10.命令 a. copy b. host c. command 答案 11.拷贝 a. address b. mouse c. copy 答案:c 12.搜索工具 a. user interface b. searching tools c. electronic mail 答案:b 存取 a. access b. protocol c. copy
通信英语 I 单项选择 1．抽样频率 a. sampling rate b. repetition rate c. sampling frequency 答案：c 2．数字通信 a. digital communication b. digital transmission c. transmission path 答案：a 3．帧格式 a. synchronization word b. frame format c. reverse operation 答案：b 4．噪声功率 a. noisy environment b. signal levels c. noise power 答案：c 5．含噪声的环境 a. signal levels b. noisy environment c. noise power 答案：b 6．模拟信号 a. speech channel b. analog signal c. amplitude value 答案：b 7．脉冲流 a. stream of pulses b. receiving terminal c. terrestrial system 答案：a 8．传输路由 a. transmission path b. transmission quality c. binary transmission 答案：a 9．互联网 a. network resource b. Internet c. interconnected systems 答案：b 10． 命令 a. copy b. host c. command 答案：c 11． 拷贝 a. address b. mouse c. copy 答案：c 12． 搜索工具 a. user interface b. searching tools c. electronic mail 答案：b 13． 存取 a. access b. protocol c. copy
答案 14.网络资源 a. textual messages b. remote terminals c. network resources 答案 15.文本信息 a. information services hypertext protocol c. textual messages 答案:c 频谱 a. bandwidth b. spread spectrum c. frequency band 答案:b 17.移动手机 a. mobile subscriber b. mobile unit c. service performance 答案:b 18.频带 a. frequency spectrum b. frequency band c. spread spectrum 答案:b 蜂窝交换机 a. cellular switch b. cellular site c. mobile unit 答案 单边带 a. single-sideband b. bandwidth c. service area 答案:a 21.服务区 a. service area b. service performance c. service capabilit 答案:a 22.移动用户 a. mobile unit b. mobile subscriber c. mobile transceiver 答案:b 微处理器 a. subsystems b. utilization c. microprocessor 答案 24.无线机架 a. radio cabinet b. antenna c. mobile unit 答案 电路交换 a. packet switching b. circuit switching c. message switching 答案 分组交换 a. packet switching b. circuit switching C. message switching 答案 报文交换 a. packet switching b. circuit switchin message switchi 答案
答案：a 14． 网络资源 a. textual messages b. remote terminals c. network resources 答案：c 15． 文本信息 a. information services b. hypertext protocol c. textual messages 答案：c 16． 频谱 a. bandwidth b. spread spectrum c. frequency band 答案：b 17． 移动手机 a. mobile subscriber b. mobile unit c. service performance 答案：b 18． 频带 a. frequency spectrum b. frequency band c. spread spectrum 答案：b 19． 蜂窝交换机 a. cellular switch b. cellular site c. mobile unit 答案：a 20． 单边带 a. single-sideband b. bandwidth c. service area 答案：a 21． 服务区 a. service area b. service performance c. service capability 答案：a 22． 移动用户 a. mobile unit b. mobile subscriber c. mobile transceiver 答案：b 23． 微处理器 a. subsystems b. utilization c. microprocessor 答案：c 24． 无线机架 a. radio cabinet b. antenna c. mobile unit 答案：a 25． 电路交换 a. packet switching b. circuit switching c. message switching 答案：b 26． 分组交换 a. packet switching b. circuit switching c. message switching 答案：a 27． 报文交换 a. packet switching b. circuit switching c. message switching 答案：c
28.专用电路 a. dedicated circuit b. error control c. return signal 答案 突发性 a. bursty b. random c. header 答案:a 30.传输时延 a. destination address b. transmission delay c. return signal 答案:b 31.中间交换设备 a. given maximum b. intermediate switching equipment c. store-and-forward manner 答案:b 子网 答案 33.公众电信网 a. public telecommunication network b. intermediate switching node c. circuit- switched network 答案 4.半双工的 a. full-duplex b. half-duplex c. external call 答案:b 35.端局 a. toll center b. end office c. tandem switch 答案:b 36.外部呼叫 a. external call b. data traffic c. toll center 答案 37.链路 a. trunk b. link c. route 答案:b 38.交换节点 a. intermediate switching node b. voice-frequency circuit tching node 答案 39.音频电路 a. telephone subscriber b. voice-frequency circuit c. two wire connection 答案:b 40.拓扑 a. internodes b. topology c. route 答案:b
28． 专用电路 a. dedicated circuit b. error control c. return signal 答案：a 29． 突发性 a. bursty b. random c. header 答案：a 30． 传输时延 a. destination address b. transmission delay c. return signal 答案：b 31． 中间交换设备 a. given maximum b. intermediate switching equipment c. store-and-forward manner 答案：b 32． 子网 a. header b. subnet c. busty 答案：b 33. 公众电信网 a. public telecommunication network b. intermediate switching node c. circuit- switched network 答案：a 34.半双工的 a. full-duplex b. half-duplex c. external call 答案：b 35. 端局 a. toll center b. end office c. tandem switch 答案：b 36. 外部呼叫 a. external call b. data traffic c. toll center 答案：a 37.链路 a. trunk b. link c. route 答案：b 38.交换节点 a. intermediate switching node b. voice-frequency circuit c. switching node 答案：c 39.音频电路 a. telephone subscriber b. voice-frequency circuit c. two wire connection 答案：b 40.拓扑 a. internodes b. topology c. route 答案：b
41.二线连接 a. data traffic b. end office c. two wire connection 答案 42.数据流量 a. data traffic b. tandem switch center 答案 43.全球通信 a. interface equipment b. global communication c. communication carriers 答案:b 44.脉码调制 a. pulse code modulation b. voice encoding c. open network 答案: 接口设备 a. switching equipment transmission medium c. interface equipment 答案:c 46.综合业务数字网 0 end-to-end digital connectivity b. international organization for standardization c. integrated services digital network 答案 47.通信载体 a. communication carriers b. transmission medium c. interface equipment 答案 48.系统结构 L. infrastructure c. flexibility d. basic access 答案 a 49.蜂窝式移动电话 a. cellular switch b. cellular mobile telephone c. cellular site 答案:b 50.数据传输 a. data transmission b. transmission error c. error flag 答案 51.传号电平 a. space level b. logical level C. mark level 答案:c 52.接收机的定时 a. intersymbol space b. serial interface c. receiver timing 答案:c 53.明显的缺点 a. transmission error b. obvious disadvantage
41.二线连接 a. data traffic b. end office c. two wire connection 答案：c 42.数据流量 a. data traffic b. tandem switch c. toll center 答案：a 43.全球通信 a. interface equipment b. global communication c. communication carriers 答案：b 44.脉码调制 a. pulse code modulation b. voice encoding c. open network 答案：a 45.接口设备 a. switching equipment b. transmission medium c. interface equipment 答案：c 46.综合业务数字网 a) end-to-end digital connectivity b. international organization for standardization c. integrated services digital network 答案：c 47.通信载体 a. communication carriers b. transmission medium c. interface equipment 答案：a 48.系统结构 a. infrastructure c. flexibility d. basic access 答案：a 49.蜂窝式移动电话 a. cellular switch b. cellular mobile telephone c. cellular site 答案：b 50.数据传输 a. data transmission b. transmission error c. error flag 答案：a 51.传号电平 a. space level b. logical level c. mark level 答案： c 52.接收机的定时 a. intersymbol space b. serial interface c. receiver timing 答案：c 53.明显的缺点 a. transmission error b. obvious disadvantage
C. error flag 答案:b 54.起始位 a. start bit b. stop bit c. parity bit 答案 空号电平 a. mark level b. space level c. the idle state 答案 56.控制比特 binary data b. local clock c. control bit 答案 57.串行接口 a. data stream b. Crt terminal c. serial interface 答案 58.发送器和接收器 a. transmitter and receiver b. receiver timing c. duration of t seconds 答案:a 59.二进制数据 答案: y data b. data stream c. data transmission a. bina 60.高速电子开关 a. the voice channel b. the repetition rate high-speed switch 答案:c II.根据所给英文选择合适的答案 1. digital communication a.全球通信b.公共通信载体c.数字通信 答案 2. voice encoding techniques a.语音编码技术b.脉冲c.脉冲编码调制 答案:a 3. basic access signaling rate a.大量的接口设备 b.基本接入信令速率 C.统一的接入 答案:b 4. the International Organization for Standardization a.综合业务数字网b.ISDN的标准和系统结构c.国际标准化组织 答案 5. end-to-end digital connectivity a.基本接入信令速率b.端对端的数字连接 C.语音编码技术 答案:b 6. progressive application of digital technology
c. error flag 答案：b 54. 起始位 a. start bit b. stop bit c. parity bit 答案：a 55.空号电平 a. mark level b. space level c. the idle state 答案：b 56.控制比特 a. binary data b. local clock c. control bit 答案：c 57.串行接口 a. data stream b. CRT terminal c. serial interface 答案：c 58.发送器和接收器 a. transmitter and receiver b. receiver timing c. duration of T seconds 答案：a 59.二进制数据 a. binary data b. data stream c. data transmission 答案：a 60.高速电子开关 a. the voice channel b. the repetition rate c. a high-speed switch 答案：c II.根据所给英文选择合适的答案 1． digital communication a.全球通信 b. 公共通信载体 c.数字通信 答案：c 2． voice encoding techniques a.语音编码技术 b. 脉冲 c. 脉冲编码调制 答案：a 3． basic access signaling rate a.大量的接口设备 b. 基本接入信令速率 c. 统一的接入 答案：b 4． the International Organization for Standardization a.综合业务数字网 b. ISDN 的标准和系统结构 c. 国际标准化组织 答案：c 5． end-to-end digital connectivity a. 基本接入信令速率 b.端对端的数字连接 c. 语音编码技术 答案：b 6． progressive application of digital technology