编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第PAGE21页共NUMPAGES21页第PAGE\*MERGEFORMAT21页共NUMPAGES\*MERGEFORMAT21页通信英语I单项选择抽样频率a.samplingrateb.repetitionratec.samplingfrequency答案：c数字通信a.digitalcommunicationb.digitaltransmissionc.transmissionpath答案：a帧格式a.synchronizationwordb.frameformatc.reverseoperation答案：b噪声功率a.noisyenvironmentb.signallevelsc.noisepower答案：c含噪声的环境a.signallevelsb.noisyenvironmentc.noisepower答案：b模拟信号a.speechchannelb.analogsignalc.amplitudevalue答案：b脉冲流a.streamofpulsesb.receivingterminalc.terrestrialsystem答案：a传输路由a.transmissionpathb.transmissionqualityc.binarytransmission答案：a互联网a.networkresourceb.Internetc.interconnectedsystems答案：b命令a.copyb.hostc.command答案：c拷贝a.addressb.mousec.copy答案：c搜索工具a.userinterfaceb.searchingtoolsc.electronicmail答案：b存取a.accessb.protocolc.copy答案：a网络资源textualmessagesb.remoteterminalsc.networkresources答案：c文本信息a.informationservicesb.hypertextprotocolc.textualmessages答案：c频谱a.bandwidthb.spreadspectrumc.frequencyband答案：b移动手机a.mobilesubscriberb.mobileunitc.serviceperformance答案：b频带a.frequencyspectrumb.frequencybandc.spreadspectrum答案：b蜂窝交换机a.cellularswitchb.cellularsitec.mobileunit答案：a单边带a.single-sidebandb.bandwidthc.servicearea答案：a服务区a.serviceareab.serviceperformancec.servicecapability答案：a移动用户a.mobileunitb.mobilesubscriberc.mobiletransceiver答案：b微处理器a.subsystemsb.utilizationc.microprocessor答案：c无线机架a.radiocabinetb.antennac.mobileunit答案：a电路交换a.packetswitchingb.circuitswitchingc.messageswitching答案：b分组交换a.packetswitchingb.circuitswitchingc.messageswitching答案：a报文交换a.packetswitchingb.circuitswitchingc.messageswitching答案：c专用电路a.dedicatedcircuitb.errorcontrolc.returnsignal答案：a突发性a.burstyb.randomc.header答案：a传输时延a.destinationaddressb.transmissiondelayc.returnsignal答案：b中间交换设备a.givenmaximumb.intermediateswitchingequipmentc.store-and-forwardmanner答案：b子网a.headerb.subnetc.busty答案：b33.公众电信网publictelecommunicationnetworkb.intermediateswitchingnodec.circ