1 通信英语知识VIP免费

通信英语I单项选择1．抽样频率a.samplingrateb.repetitionratec.samplingfrequency答案：c2．数字通信a.digitalcommunicationb.digitaltransmissionc.transmissionpath答案：a3．帧格式a.synchronizationwordb.frameformatc.reverseoperation答案：b4．噪声功率a.noisyenvironmentb.signallevelsc.noisepower答案：c5．含噪声的环境a.signallevelsb.noisyenvironmentc.noisepower答案：b6．模拟信号a.speechchannelb.analogsignalc.amplitudevalue答案：b7．脉冲流a.streamofpulsesb.receivingterminalc.terrestrialsystem答案：a8．传输路由a.transmissionpathb.transmissionqualityc.binarytransmission答案：a9．互联网a.networkresourceb.Internetc.interconnectedsystems答案：b10．命令a.copyb.hostc.command答案：c11．拷贝a.addressb.mousec.copy答案：c12．搜索工具a.userinterfaceb.searchingtoolsc.electronicmail答案：b13．存取a.accessb.protocolc.copy答案：a14．网络资源a.textualmessagesb.remoteterminalsc.networkresources答案：c15．文本信息a.informationservicesb.hypertextprotocolc.textualmessages答案：c16．频谱a.bandwidthb.spreadspectrumc.frequencyband答案：b17．移动手机a.mobilesubscriberb.mobileunitc.serviceperformance答案：b18．频带a.frequencyspectrumb.frequencybandc.spreadspectrum答案：b19．蜂窝交换机a.cellularswitchb.cellularsitec.mobileunit答案：a20．单边带a.single-sidebandb.bandwidthc.servicearea答案：a21．服务区a.serviceareab.serviceperformancec.servicecapability答案：a22．移动用户a.mobileunitb.mobilesubscriberc.mobiletransceiver答案：b23．微处理器a.subsystemsb.utilizationc.microprocessor答案：c24．无线机架a.radiocabinetb.antennac.mobileunit答案：a25．电路交换a.packetswitchingb.circuitswitchingc.messageswitching答案：b26．分组交换a.packetswitchingb.circuitswitchingc.messageswitching答案：a27．报文交换a.packetswitchingb.circuitswitchingc.messageswitching答案：c28．专用电路a.dedicatedcircuitb.errorcontrolc.returnsignal答案：a29．突发性a.burstyb.randomc.header答案：a30．传输时延a.destinationaddressb.transmissiondelayc.returnsignal答案：b31．中间交换设备a.givenmaximumb.intermediateswitchingequipmentc.store-and-forwardmanner答案：b32．子网a.headerb.subnetc.busty答案：b33.公众电信网a.publictelecommunicationnetworkb.intermediateswitchingnodec.circuit-switchednetwork答案：a34.半双工的a.full-duplexb.half-duplexc.externalcall答案：b35.端局a.tollcenterb.endofficec.tandemswitch答案：b36.外部呼叫a.externalcallb.datatrafficc.tollcenter答案：a37.链路a.trunkb.linkc.route答案：b38.交换节点a.intermediateswitchingnodeb.voice-frequencycircuitc.switchingnode答案：c39.音频电路a.telephonesubscriberb.voice-frequencycircuitc.twowireconnection答案：b40.拓扑a.internodesb.topologyc.route答案：b41.二线连接a.datatrafficb.endofficec.twowireconnection答案：c42.数据流量a.datatrafficb.tandemswitchc.tollcenter答案：a43.全球通信a.interfaceequipmentb.globalcommunicationc.communicationcarriers答案：b44.脉码调制a.pulsecodemodulationb.voiceencodingc.opennetwork答案：a45.接口设备a.switchingequipmentb.transmissionmediumc.interfaceequipment答案：c46.综合业务数字网a)end-to-enddigitalconnectivityb.internationalorganizationforstandardizationc.integratedservicesdigitalnetwork答案：c47.通信载体a.communicationcarriersb.transmissionmediumc.interfaceequipment答案：a48.系统结构a.infrastructurec.flexibilityd.basicaccess答案：a49.蜂窝式移动电话a.cellularswitchb.cellularmobiletelephonec.cellularsite答案：b50.数据传输a.datatransmissionb.transmissionerrorc.errorflag答案：a51....