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