通信英语复习资料(答案)

选择合适的答案填空B A B D D B 1. Furthermore, we shall prove that a minimum theoretical sampling frequency of order 6.8 kilohertz(khz) is required a voice channel the range 300 HZ to 3.4 Khz. Aconvey,occupy B. to convey, occupying C.conveying, occupied D. convey, to occupy 2. For example, the signal from a satellite, in far outer space, is very weak. A.received, located B. receive, locate C.receiving,location D. to receive, to locate 3. If we consider binary transmission, the complete information about a particular message will always by simply the presence or absence of the pulse. A. obtain, detectB. be obtained, detectingC. obtained, detectedD. obtaining, detected 4. there is an inherent advantage for noisy environments by digital transmission. A. overcoming, choose B. overcome, choosing C. overcome, choose D. overcoming, choosing 5. each voice channel has a separate coder, the unit converts sampled amplitude values to a set of pulses; and decoder, the unit performs the reverse operation. A.who,who B. when, when C.where,where D. that, that 6. The problem is easily overcome by a frame format, where at the start of each frame a unique sequence of pulses called the frame code, or synchronization word, is placed the start of the frame. a.specify,identify b.specifying,so as to identify c.specified,identified d. specify, identifying 1. an asynchronous serial data link is said ( )character oriented, as information is transmitted in the form of groups of bits ( )characters. a. be, calling b. to being, to call c. been, call d. to be, called 2. this interface is so called because the ( )data and the ( ) data are not synchronized over any extended period. a. transmit, receive b. to transmit , to receive c. transmitting, receiving d. to be , called 3. serial data transmission systems ( )in the telephone, Morse code, and even the smoke signal once ( ) by native Americans. a. are finding, using b. are found, used c. find, use d. be found, using 4. traditionally, the idle state ( )the mark level. By convention this corresponds ( ) a logical 1 level. a. is referred to, as b. is referred as, in c. is referred to as, to d. is referred, within 5. the transmitter then sends the character, 1 bit at a time, by ( )each successive bit on the line for a duration of T seconds, ( )all bits have been transmitted. a. place, still b. placed, since c. placing, until d. placing, because 6. when the data link connects a CRT terminal ( ) a computer, ( ) problems arise, as the terminal is itself character oriented. a. into, many b. on, a few c. in , a few d. to, few 7.( )the receiving end of a synchronous serial data link, the receiver continually monitors the line ( ) a start bit. a. on, looking b. within , look for c. in, look at d. at, looking for 1. as companies realized they could save money and gain productivity by ( ) networking technology, they added networks and expanded( ) networks almost as rapidly as new network technologies and products could by introduced. a. use, exist b. using, existing c. to use, to exist d. used, existed 2. the OSI reference model allows you ( ) the network functions that occur at each layer. More importantly, the OSI reference model is a framework you can use ( ) how information travels throughout a network. a. view, understand b. viewing, ( ) host ’s system and reassembles the data into a data stream on the ( ) host ’s system. a. sending, receiving b. to send, to receive c. sent, received d. send, receive 4. the data link layer provides the transit of data ( ) a physical link. In so doing, the data link layer is concerned ( ) physical addressing, network topology, network media access, and error detection. a. with, across b. at, in c. between, in d. across, with 1. the TCP/IP model has historical importance, just like the standards that allowed the telephone, electrical power, railroad, television, and videotape industries( ) a. to be created b. to flourish c. to be placed by internet d. to be in use 2. TCP/IP supports dialogues between source and destination while ( ) application layer information into units ( )segments. a. package, call b. to package, to call c. packaged, calling d. packaging, called 3. the purpose of the internet layer is ( ) source packets from any network on the internetwork and have them ( ) at the destination independent of the patch and networks they took to get there. a. to send, arrive b. sending, arriving c. sent, arrived d. to be sent, be arrived 4.IP serves as a universal protocol( ) allows any computer, anywhere,（ ）at any time. a. it , be communicated b. where, connecting c. who, connected d. that, to communicat e 1. bus topology uses a single backbone segment (length of cable)( )all the hosts directly connect. a. to which b. which c. at that d. in which 2. hierarchical topology is similar to an extended star topology, but instead of ( ) the hubs/switches t to gether, each secondary system is linked to a primary computer that controls the traffic on the topology. a. link b. linking c. linkage d. linked 3. host devices perform the entire process of the encapsulation and de-encapsulation ( ) their job of ( ) e-mails, printing reports, scanning pictures, or accessing databases. a. did, sent b. doing, send c. in doing , to send d. to do, sending 4. the NIC is the basic hardware component of network communications. It translates the parallel signal ( )by the computer into the serial format that is ( ) over the network cable. a. produce, send b. produced, sent c. to produce, to send d. producing, sending 1. Two reasons to use hubs are to create a central connection point for the wiring media, and to increase the reliability of the network. The reliability of the network is increased by ( )any single cable to fail without ( ) the entire network. a. allowing, disrupting b. allow, disrupt c. to allow, to disrupt d. allowed, disrupted 2. Active hubs also are called multiple port repeaters because they have multiple ports and they regenerate the signal ( ) into one port before ( ) it back out the other ports a. come, send b. came, sent c. coming, sending d. being come, being sending 3. A bridge is a layer 2 device ( ) two or more LAN segments, each of which is a separate collision domain. That is , they were designed to create more useable bandwidth. a. designed creating b. design o create c. designing to create d. designed to create 4. Because bridges look only at MAC addresses, they are not concerned ( )network layer protocols. Consequently, bridges are concerned only with passing or not passing frames,（ ）their destination MAC addresses. a. with based on b. in, to base c. at, basing d. to ,based 1. it was ( ) in 1969, when the U.S. Department of Defense established a nationwide network ( )a handful of universities and contractors. a. start, connect b. started, to connect c. to start, connected d. to start, to connect 2. if somebody else had something interesting ( ) on their computer, it was a simple matter ( ) a copy. a. stored , to obtain b. to store, obtained c. storing, obtaining d. store, obtain 3. the internet is a huge （ ） systems, but it uses just a handful of method ( )data around. a. interconnect, move b. interconnected, to move c. to interconnect, moved d. interconnecting, moving 4. the most commonly （ ）network service is electronic mail ( E-mail), or simply as mail. Mail permits network users ( ) textual messages to each other. a. use, send b. to use, sent c. used, to send d. using, sending 5. today thousands of networks and millions of computers ( )the internet. a. are connected to b. connected to c. to connect d. connecting to 6. the simplest way ( ) a file on another host is to copy it across the network to your local host. FTP can do this. a. access b. to access c. accessed d. success 1. One indication of the extent of this development is the total length of ( ) fiber, which was estimated ( )3.2 million kilometers in the U.S. a. install, b b. installing, being c. to install, was d. installed, to be 2. The researchers( ) produced the first clad glass optical fibers were not thinking of ( )them for communications. a. which, use b. that, used c. who, using d.. one, to use 3.The single-mode fiber ,( )in conjunction with a 1.3um laser, provides a bandwidth advantages which translates into ( ) repeater spacings for high-data rate systems. a. used, increased b. using, increase c. use, to increase d. to use, increasing 4. In the telephone system, the use of fiber optics for ( ) central offices within a metropolitan area and for lower levels in the switching hierarchy is still ( ) rapidly. a. interconnect, increase b. interconnecting, increasing c. to interconnect to increase d. interconnected, increased 5. The fibers were fragile, and a way ( ) would have ( ). a. protect, found b. protection, find c. to protect, to be found d. protecting finding 6. Many observers believe that national telephone system will eventually be upgraded( )video bandwidths by ( ) fiber optics. a. handle, use b. handled, used c. handling, usage d. to handle, using 1. One of many reasons for ( ) a cellular mobile telephone system and ( ) it in many cities is the operational limitations of conventional mobile telephone systems a. develop ,deploy b. to develop, to deploy c. developing, deploying d. developed, deployed 2. The ideal mobile telephone system would operate within a ( )assigned frequency band and would serve an almost( ) number of users in ( ) areas. a. limited, unlimited, unlimited b. limitation, limitation, limitation c. limit, limit, limit d. limiting, limiting, limiting 3. LSI technology and mass production contribute to reduced cost ( ) in the near future an average-income family should be able ( ) a mobile telephone unit. a. which, affording b. that, afforded c. when ,afford d. so that, to afford 4. Microprocessors and minicomputers are now ( ) for controlling many complicated features and functions with less power and size ( ) was previously possible. a. used, than b. use, this c. using, they d. usage, it 5. On Jan.4, 1979, the FCC ( ) Illinois Bell Telephone Co. ( ) a developmental cellular system in the Chicago area and make a limited commercial offering of its cellular service to the public.a. authorize, conduct b. authorizing, conducting c. authorized, to conduce d. to authorize, conducted 6. Why 800 MHZ? The FCC ’s decision ( ) 800 MHZ was ( ) because of severe spectrum limitations at lower frequency bands. a. to choose, made b. choose, to make c. choice, make d. choice, making 1. For mobile the problem is far more complex, with the need to roam ( ) a need for complex networks and systems. Thus in mobile the question of standards is far more crucial to success ( ) fixed systems. a. to create, in b. creating, than c. creation, that d. created, with 2. The broadcast mobile networks, ( ) in densely populated areas, could be ( ) by a very small number of simultaneous calls. a. operation, jam b. operate, jam c. operating, jammed d. to operate, to jam 3. The use of digital radio transmission and the advanced handover algorithms between radio cells in GSM network allows for significantly better frequency usage ( ) in analogue cellular systems, thus( ) the number of subscribers that can be served. a. that, creation b. which, create c. the , to create d. than, creating 4. The third generation mobile communication system currently （ ） in Europe is intended （ ） all the different services of second generation systems a. in developed, integrate b. be developed, integrated c. to develop, integrating d. being developed, to integrate 1. The switches, ( ) circuit switches, have no capability of ( )user ’s data on their way to the destination. a. calling, stored b. called, storing c. to call, to store d. be called, be stored 2. The circuit is set up by a special signaling message ( ) finds its way through the network, ( ) channels in the path as it proceeds a. that, seizing b. where, seizing c. who, seized d. one, be seized 3. The switching element is a computer ( ) a message processor, with processing and storage capabilities. Messages travel independently and asynchronously, ( ) their own way from source to destination. a. to call, find b. calling, found c. referred to as, finding d. be called, sending 4. A variation of message switching is packet switching. Here the message is broken up into several pieces of a ( ) maximum length, （ ）packets. a. given, called b. give, call c. giving, calling d. to give, to call 1. ATM transfers information ( ) short packets call “cell s” ( )a fixed length of 48 bytes plus five header bytes. a. of, in b. in, with c. to ,for d. for, without 2.ATM retains all the flexibility of packet mode, ( )only required information ( ). a. enable, convey b. enabling, to be conveyed c. enabled, to convey d. to enable, be conveyed 3. ATM, ( )than any other telecommunications technique, is able ( ) the current and future requirements of both operators and users. a. greater, meeting b. many, to meet c. much, meet d. much more, to meet 4. ATM was initially intended( )high bit rates, but it has in fact proved to be a universal technique for ( )any type of digitized information at a wide variety of bit rates. a. handle, switch b. handling, to switch c. handled, switched d. to handle, switching 5. On the other hand, ATM retains all the flexibility of packet mode, ( )only required information( ). a. enabling, to be conveyed b. enable , be conveyed c. to enable, to convey d. enabled, conveyed 6. ATM dated from the beginning of the 1980s: at the time, people ( ) to find the most suitable technique for ( ) high bit rate channel at more than 100 Mbit/s. a. is trying, switch b. were trying, switching c. are trying, to switch d. want to try, to switch 1. the telephone contains a transmitter an receiver for ( ) back an forth ( )analog voice and analog electrical signals. a. cover, in b. converting, between c. conversion, to d. converted, into 2. each subscriber connects ( )local loop to a switching center, ( ) as a end office. a. to ,calling b. with, known c. the, know d. via, known 3. the trunks are designed ( ) multiple voice-frequency circuits ( ) either FDM or synchronous TDM. a. carry, use b. carried, used c. to carry, to use d. to carry, using 4. Although originally designed and ( ) to service analog telephone subscribers, it handles substantial data traffic( ) modem, and is gradually being converted to a digital network. a. implemented, via b. implementing, in c. to implement, within d. design, on 5. designers have found it convenient ( ) these nodes into a hierarchy or tree topology, ( ) five chasses of switching centers or nodes. a. organization, consist b. organize, consisting c. to organize, consisting of d. organizing, to consist 1. ISDN ’s enormous importance only gradually being ( ). Years of work have been ( ) the CCITT and the ISO. a. understand, carry b. understanded, carried c. to be understood, to carry d. understood, carried out 2. the term ISDN was first defined within the CCITT in 1972. it referred to a network ( ) end-to-end digital connectivity( ) a range of services. a. providing, for b. provision, to c. provided, with d. provide, into 3.similarly, the introduction of voice encoding techniques ( ) ulse code modulation contributed ( ) the ISDN ’s concept evolution. a. usage, on b. using, to c. use, with d. used , so as to 4. in fact, ISDN ( ) conceived a quarter of a century ago and is only now ( )to reach maturity. a. is, begin b. was beginning c. be, to begin d. will be, began 5. the enhanced quality is achieved when a signal is digitally encoded ( )degradation ( )the transmission medium. a. overcome, to b. overcame, with c. overcoming, over d. to overcome, due to 6. as regards economy, early studies suggested that digital services ( )significant advantages since a substantial quantity of interface equipment in the telephone exchange could( ). a. offered, be eliminated b. offer, eliminate c. offers, is eliminated d. to offer, to eliminate 1. computer data ( ) in the public domain by a packet switched data network ( ) x..25 protocols. a. are transported, based on b. transports, base on c. transported, based on d. to transport, base 2. when ( ) the future BISDN network, one must ( ) all possible existing and future services. a. design, take b. designing, take into account c. designed, account d. to design, taking 3. a telex network ( ) telex information, i.e. messages of characters, ( )at very low speed. a. transports, transported b. transported, transport c. to transport, to transport d. transporting 4. the N-ISDN cannot transport TV signals ( ) its limited bandwidth capabilities, so a special TV network is still( ). a. because, require b. with, to require c. due to , required d. within, requiring 5. each network is only capable ( )one specific service for ( ) it was intentionally designed. a. of transporting, which b. transporting, one c. transport, where d. to transport, when。

一、英译汉P35 The reduction in power dissipation is particularly important where acomplex circuit is to be concentrated into a small space.The problem of extracting theheat generated in the circuit may then be a difficult one.减小功率损耗是非常重要的，其方法是将一个复杂的电子线路集成为一小块。

这使得释放电路工作时产生的热量变成一个难题。

P48 [4] A CD-ROM can store in excess of 500 megabytes (millions of bytes) of data-as compared with computer's hard disk,whose maximum storage capacity is about 200megbytes和计算机硬盘相比，一个只读存储器可以存储超过500 MB的数据，它的最大存储容量大约为200 MB。

P64 [2] The original source information can be in analog (continuous) form,such as thehuman voice or music,or in digital (discrete) form,such as binary-coded numbers or alphanumeric codes.原始的信息源既可以是模拟(连续)的，例如语音或音乐; 也可以是数字(离散)的，例如二进制编码数或字符码。

P100 [4] As data networks advanced from terminal-oriented systems to packet-switched, Computer-to-computer linkups,the protocols necessary to make networks function alsogrew more complex.由于数据网络从面向终端的系统向分组交换、计算机与计算机连接的方向发展，执行网络功能所必需的协议也变得愈来愈复杂。

一、汉译英1、抽样、量化与编码（sampling, quantizing and coding）2、地面系统(terrestrial system)3、数字传输( digital transmission)4、信号电平(signal levels)5、移动交换中心( mobile switching center)6、蜂窝通信原理( cellular communication principle)7、突发脉冲传输方式( burst transimission mode)8、切换算法( handover algorithms)9、网络资源( network resource)10、文本信息(hypertext protocol) textual messages二、英译汉1、the largest repository of information (最大的信息库)2、the networked hypertext protocol （网络文本信息）联网的超文本协议3、the network facilities resources（网络设备资源）4、to combine high speed mobile access with IP-based services （要结合IP为基础的服务的高速移动接入）基于IP的业务与高速移动接入结合在一起5、to standardize future digital wireless communication （以规范未来的数字无线通信）使未来的数字无线通信标准化6、the third-generation wireless technology and networks （第三代无线技术和网络）7、to integrate all kinds of services （整合各种服务）8、the need to increase network capacity （需要增加网络容量）9、the time division multiple access （在时分多址）时分多址10、the different schemes for performing these three functions （执行这三个功能不同的方案）对这三个环节的实现提出了不同的方案11、a speech channel of telephone quality （电话质量的语音信道）话路中的语音信号12、the thermal low-level noise within the communication equipment （该通信设备内的热低电平噪声）通信设备本身低电平的热噪声13、an inherent advantage for overcoming noisy enviroments （克服嘈杂环境的先天优势）14、the analog information signal of each channel （每个信道的模拟信息信号）15、to separate the 8-digit sequences into the appropriate channels（到8位的序列中分离到适当的信道）将8位码序列分配到相应的话路中16、so as to identify the start of the frame（以便识别所述帧的开始）三、选择题1、for example,the signal___A (received )______from a satellite,located in far outer space is very weak.a. receivedb.receivec.receivingd.to receive2、If we consider binary transmission,the complete information about a particular message will always be obtained by simply __B ( detecting) ______the presence or obsence of the pulse.a. detectb.detectingc.detectedd.detected3、There is an inherent advantage for overcoming noisy environments by__B( chooseing) _digital transmission.a.chooseb.choosingc.to choosed.to be chosen4、before you can use the Internet,you must choose a way__A( to move)_____________data between the Internet and your PC.a. to moveb. movingc.movedd.to be moved5、Althought all these services can well satisfy the needs of the users for information exchange,a definite requirement is___ B.(needed )______for the users.a.needb.neededc.needingd.to be needed6、People who have to use a mobile phone on business soon begin_ C .(to realize )_____that the ability to phone any time,any place in one's personal life rapidly becomes a necessity,not a convenience.a.to realizeb.to be realizedc.to realized.realized7、For mobile the problem is far more complex，with the need to roam___ C(.creating _)_________a need for complex networks and systems.a.to createb.to be createdc.creatingd.create8、Frequency resue comes into play by____ D ( using ) _______radio channels on the same frequency in coverage areas that are for enough apart not to cause co-channel interference.eb.to usec.to be useding9、The GSM system requires a number of fuctions___ A.(to be created )__________for a fully operational mobile system.a.to be createdb.creatingc.createdd.to create１0、A jump to other Internet service can be___C(.triggered )_______by a mouse click on a "hot-linked" word,image,or icon on the Web pages.a.triggerb.to triggerc.triggeredd.to be triggeredUNIT 1 PCM1.In these descriptions we shall see how a speech channel of telephone quality may be conveyed as a series ofamplitude values, each value being represented, that is, coded, as a sequence of 8 binary digits. ( 在这些讨论中，我们会看到话路中的语声信号时如何转换成幅值序列的，而每个幅值又被编码，即以8位二进制数的序列表示。

通信专业英语复习要点一、翻译下列短语：1.汉译英：公众电信网 public telecommunication network 数据流量 data traffic音频电路交换接点电话用户 telephone subscriber 全球通信 global communications传输媒体 transmission medium 接口设备开放网络Open network语音编码 voice encoding光源 light source 宽带用户 wideband subscriber单模光纤波分复用通信卫星 communication satellite 信息安全 information security定时信号地下电缆数据终端 data terminals电子邮件 electric mail 远程终端 remote terminal网络资源 network resource 用户界面无线信道点播业务on-demand services数字信号视频压缩全活动图像 motion picture 存储电话交换台寻呼业务单向通信移动电话网 mobile telephone network 无线发射机模拟方式短消息服务 short message service 国际漫游 international roaming通信标准 communication standards 基站2. 英译汉：national networks 国家网络local loop本地环路full-duplex connection 全双工的连接transmission facilities传输设备high-usage trunks 高效中继线pulse code modulation 脉码调制digital communication 数字通信bandwidth limitations 带宽限制the integrated digital networkexperimental technologySome type of data conversion equipment 某些类型的数据转换设备？Coding process in the data transmitterTransmission impairmentsMagnetic core memories 磁心存储器Long distance transmission 长途传输Commercial technology 商用技术Optical fibre communicationMultifibre connectorsInformation capacity 信息容量Broadband service 广播业务Digital signal processorhigh definition television 高清晰电视Colour monitor 彩色显示器hard disk storage 硬盘存储Interactive environment 交互环境network facilities resourcesElectronic conferencesworld wide webSearching tool 搜索工具live conversation 实时对话means to communicatethe called personthe paging systems using wireless transmissionglobal coverageuser terminaltime division multiple accessmarket growth 市场的发展the cost and quality of the linksubscriber register 用户寄存器digital signal processor 数字信号处理器hard disk storage 硬盘存储二、将下列短文译成中文：The fixed telephone service is global and the interconnection varies from coaxial cable to optical fibre and satellite. The national standards are different, but with common interfaces and interface conversion, interconnection can take place. For mobile the problem is far more complex, with the need to roam creating a need for complex networks and systems.国家电话业务是全球性的，系统的相互连接采用同轴电缆、光纤甚至卫星，虽然全国标准不同，但却采用共同的接口装置，使得相互连接可以进行，对移动通信来说，问题更加复杂，这是由于需要漫游业务就要有更复杂网络系统。

Unit 1四、根据课文内容选择正确答案(正确答案已在题中以"√"表示) -1. If the signal is very large compared to the noise level, then .B. a perfect message can take place (√〉2. If we consider binary transmission, the complete information about a particular message will always be obtained .D. by detecting the presence or absence of the pulse (√〉3. At the receive terminal to separate the 8-digit sequences into the appropriate channels.B. a demultiplexer is needed(√)4. it is which id of the most interest to the communication engineer.B. the relationship of the true signal to the noise signal(√)5.The codec is arranged ,and code this value into the 8-digit sequence.D. o sample the amplitude value 〈√〉6. Digital transmission for overcoming noisy environments.B. provides a powerful method (√)7. The signal is very weak.C. received from a satellite 〈√〉8. The shape of the transmitted signal are most easily affected by the noise and attenuationA. introduced by the transmission path〈√〉9. The demultiplexer knows which group of 8-digits relates to channel 1B. by identifying the synchronization word (√〉Unit 2四、根据课文内容选择正确答案(正确答案已在题中以"J"表示)1. An asynchronous serial data link is said to be character oriented, .C. as information is transmitted in the form of groups of bits called characters (√)2.When the transmitter wishes to send data, it first .A .places the line in a space level (√)3. Then a single parity bit is calculated by the transmitter and |C. sent after the data bits (√)4. The falling edge of the start bit triggers the receiver’s local clock, whichA. samples each incoming bit at its nominal center (√)5. The most obvious disadvantage of asynchronous data transmission isc. the need for a start, parity, and stop bit for each transmitted character (√)6. In fact ,the asynchronous serial data link isB. a very old form of data transmission system (√)7. At the receiving end of an asynchronous serial data link, the receiver continually monitors the lineC. looking for a start bit (√)Unit 3四、根据课文内容选择正确答案(正确答案已在题中以"√"表示):E1. As companies realized they could save money and gain productivity by using networking technology, they .C. added networks and expanded existing networks (√)2. Dividing the network into these seven layers provides a lot of advantages , for example, it facilitates standardization of network components .D. to allow multiple-vendor development and support (√)3. The process of moving information between computers is divided into smaller and more manageable steps in the OSI reference model.A. seven (√〉4. If you want to remember Layer 4,the transport layer, in as few words as possible, think ofA. the flow control and reliability (√)5. The network layer is a complex layer that provides between two host systems that might be located on geographically separated networks.B. connectivity and path selection (√)Unit4四、根据课文内容选择正确答案(正确答案已在题中用"√"表示):..1.TheTCP/IP model has four layers : the application layer,the transport layer,B. the internet layer and the network access layer (√)....2.The purpose of the internet layer is to send source packets from any network on the internetwork and have them arrive at the destination the path and networks they took to get there.D. independent of (√)3.In TCP/IP model, the transport layer supports two protocols:A. Transmission Control Protocol and Use Datagram Protocol (√)4. If you compare the OSI model and the TCP/IP model, you can notice that they have some differences. For example, TCP/IP combinesB. the OSI data link and physical layers into one layer (√)Unit 5四、根据课文内容选择正确答案(正确答案已在题中用"J"表示):|1. Host devices are not part Many layer .They have a physical connection to the network media by having and the functions of the other OSI layers are performed in software inside the host.B. a network interface card (√)2. NICs are considered Layer 2devices because each individual NIC throughout the world carriesa unique code ,calledD. Media Access Control address (√)3. One of the disadvantages of the type of cable that we primarily use, CAT 5 UTP, isC. cable length (√)4.When signals first leave a transmitting station, they are clean and easily recognizable. However, the longer the cable length ,the the signals become as they pass along the networking media.B. the weaker (√)Unit 6四、根据课文内容选择正确答案(正确答案己在题中用"、/"表示):1. Where a repeater typically has only two ports ,a i111b generally has from four to twenty or more ports .Whereas a repeater receives on one port and repeats on the other,C. a hub receives on one port and transmits on all other ports (√)2.Consequently,bridges are concerned only with passing or not passing frames, based onC .their destination MAC address (√)3. The purpose of a router is to examine incoming packets (Layer 3data),choose the best path for them through the network ,and thenC. then switch them to the proper outgoing ports (√)4.Physical,or MAC addresses usually are assigned by the NIC manufacturer and are hard-coded into the NIC-Network-layer addresses, or IP address, or IP addresses ,on the other hand, usually are assignedD. by the network administratorUnit 7四、根据课文内容选择正确答案(正确答案已在题中以"√"表示):|1. People on the ARPNET quickly discovered that they could .B. exchange messages and conduct electronic "conferences "with distant colleagues (√)2. Today thousands of networks and millions of computers are connected to the Internet. It is growing so quickly how many users "On the Net".D. that nobody can say exactly (√)3. The Internet is an international collection of computer networks that ,connected together through backbone systems.A .all understand a standard system of addresses and commands (√)4.The Internet is the largest repository of information which can provide very very large network resources. The network resources can be divided Into .C. facilities resources and information resources (√〉5.As more and more systems join the Internet ,and as more and more forms of information can be converted to digital form,A. the amount of stuff available to Internet users continues to grow (√)6.Before you can use the Internet ,you mustB. choose a way to move data between the Internet and your PC(√)7. is a networked hypertext protocol and user interface.D. World wide web (√)Unit 8四、根据课文内容选择正确答案(正确答案已在题申以"J"表示):1. The first low-loss silica fiber was described in a publication which appeared in October of 1970.The date of this publication is sometimes cited asA. the beginning of the era of fiber communication (√)2. Data rates for installed fiber optic systems have recently moved intoA. the gigabit per second range (√)3. The use of wavelength multiplexing is becoming more wide-spread.A. to increase the fiber information capacity (√)4. Fiber links to the home have been usedB. in demonstration projects (√)5. The wideband subscriber loop systems would provide access to servicesC. such as picturephone(√)6. One of the most important technological developments during the 1980s has been the emergence of as a major international industry.D. optical fibre communication (√)Unit 9四、根据课文内容选择正确答案(正确答案已在题中以"√"表示1. A major problem facing the radio communication industry is the limitation ofC. the available radio frequency spectrum (√)·2. Large-Scale Integrated circuit technology reduced so that they easily fit into the standard automobile.B .the size of mobile transceivers(√〉3. A basic cellular system consists of three parts : a mobile unit, .A. a ceil site, and a mobile telephone switching office(√〉4.Each mobil unit can only use one channel at a time for its communication linkB. but the channel is not fixed (√)5.The cellular switch, which can be either analog or digital, switches callsA. to connect mobile subscribers to the nationwide telephone network (√)Unit 10四、根据课文内容选择正确答案(正确答案己在题中以"飞JJ"表示)h:..l .the speed and rapidity with which the personal communication revolution takes place ,unlike fixed transmission system, highly dependent onC. technology and communication standards (√)!....2.The GSM system is based on which was first proposed as a concept in the 1940s by Bell system engineers in US.B. cellular communication principle(√)3.The cellular concept is defined by two features,A. frequency reuse and cell splitting (√)4.For mobile the three key elements to achieving service take--up are .B. the cost, the size and the weight of the phone ,and the cost and quality of the link(√)5. The interconnection in the fixed telephone service is far more than that in the mobile.A. simple (√)6. The power of the cellular system was that it allowed .C. frequency reuse(√)7.These two forms of information ,tile speech and the data information ,are the usef111part of the transmission ,but have to be supported .A. by overhead information (√)。

GMDSS通信英语包过500题带答案翻译（不全）GMDSS通信英语500题(带答案)第一部分单项选择题第一章GMDSS通信基础知识001. Which of the following is a required GMDSS function?A. Bridge-to-bridge communications.B. Reception of weather map facsimile broadcasts.C. Both of these.D. None of these.下述哪一项是GNDSS功能所要求的？驾驶台对驾驶台通信A002. Which of the following is a required GMDSS function?A. Transmit and receive location signals.B. Transmit and receive general communications.C. Both of these.D. None of these.下述哪一项是GNDSS功能所要求的？(A发送和接收寻位信号；B 常规通信);两者都是C003. GMDSS is required for which of the followings?A. All vessels capable of international voyages.B. SOLAS Convention ships of 300 gross tonnage or more.C. Vessels operating outside of the range of VHF coastal radio stations.D. Coastal vessels of less than 300 gross tons.GMDSS适用于下面哪一项？300总吨及以上的SOLAS船舶 B004. What is the fundamental concept of the GMDSS?A. It is intended to automate and improve existing digital selective calling procedures and techniques.B. It is intended to automate and improve emergency communications in the maritime industry.C. It is intended to provide more effective but lower cost commercial communications.D. It is intended to provide compulsory vessels with a collision avoidance system when they are operating in waters that are also occupied by non-compulsory vessels.GMDSS的基本概念是什么？在航运业，它用来使紧急通信自动化并提高通信B005. What equipment can be used to receive Maritime Safety Information?A. HF NBDP.B. NA VTESC. EGC receiver.D. All of these.什么设备可以用来接收海上安全信息？(HF NBDP，NA VTEX，EGC receiver )，以上都是D006. Which statement is false regarding the radio operator requirements for a GMDSS-equipment ship station?A. One of the qualified GMDSS operators must be designated to have primary responsibility for radio communications during distress incidents.B. A qualified GMDSS operator, and a qualified backup, must be designated to perform distress, urgency and safety communications.C. Maintaining a record of all incidents connected with the radio communication service which appear to be of importance to safety of life at sea is not required.D. While at sea, all adjustments or radio installations, servicing or maintenance of such installations which may affect the proper operation of the GMDSS station must be performed by, or under the supervision of, a qualified GMDSS operator.关于配备有GMDSS的船台对无线电操作员的要求的描述，下列哪个是错误的？不要求记录对海上人命安全重要的无线电通信业务的有关事件C007. Which statement is false regarding the maintenance of GMDSS equipment at sea?A. The GMDSS operator may not be the person designated to have primary responsibility for radio communications during distress incidents.B. Ships must carry at least one person who qualifies as a GMDSS maintainer for the maintenance and repair of equipment if the at sea maintenance option is selected.C. All at sea maintenance and repairs must be performed by, or under the supervision of a person holding aGMDSS First/Second Class Radio Electronic Certificate.D. The GMDSS maintainer may be the person responsible for ensuring that the watches are properly maintained and that the proper guard channels and the vessel’s position are entered in the DSC equipment.关于海上GMDSS的维修哪一项是错误的？GDMSS操作员不能是遇险事件时的专门通信操作员A 008. What is defined as an area outside sea areas A1, A2 and A3?A. AOR-E.B. AOR-W.C. Coastal and inland waters.D. A4.什么被定义为除A1，A2，A3海区以外的区域？A4 D009. Which radio equipment is not necessary for the ships sailing in the sea area A1?A. NA VTES receiver.B. VHF EPIRB.C. 406MHz EPIRBD. VHF DSC.在A1海区航行的船舶不必配备哪种无线电设备？C010. Which of the following is a functional or carriage requirement for compulsory vessels?A. A compulsory vessel must satisfy certain equipment carriage requirements that are determined by where the vessel sails.B. A compulsory vessel must carry licensed GMDSS operators, the number should be determined by the associated administration.C. A compulsory vessel must be bale to transmit and respond to distress alerts.D. All of these.对强制船舶来讲，下面哪一项是功能或是必要配备？A.强制船舶无论航行在哪里都必须配备某种安全运输设备；B.强制船舶必须配备GMDSS操作员，人数应由主管机关来决定的；C.强制船舶必须发送和回应遇险报警。

通信工程专业英语习题答案练习参考答案第1单元信号与系统1. 完形填空(1) band-limited, cutoff frequencies, to, between, the information rate is proportional to the bandwidth of the channel, on, to, by, by simply increasing the number of levels, noise will cause the receiver to mistake one level for another, no matter how elaborately the data is coded, between, theoretical maxima.(2) from, a loss of information , the twisted pair, addition of noise to the signal, depends on the signal frequency, the high-frequency components of the signal, over, between, through, of, with, including.(3) for, to, In some cases, over, (microwave relay, coaxial cable, or fiber), ADC, to, thereby achieving a reduction in required channel bandwidth, of, signal recovery, (Techniques such as filtering, auto-correlation and convolution).2. 英汉互译(1) “电信”（telecommunication）一词来源于希腊语tele（含义为“遥远的”）和拉丁语communicatio（涵义为“连接”）。

Unitl【中译英】⑴信号:signal (2)波特率:the baud rate (3)单I:simplex (4)同步:synchronous (5)信道:communications channel(6)模拟:analog (7)数字:digital (8)电磁的:electromagnetic (9)串行口:serial port (10)带宽:bandwidth【英译中】(1)baud:波特(2) asynchronous:异步的(3) full duplex:全双工(4) parallel:并行(5) electromagnetic:电磁的(6) discrete:离散的(7) simultaneously:同时发生地(8) parity：奇偶校验【句子翻译(英译中)】1.Since transmitted data can be assigned to different frequencies,the wider the bandwidth,the more the frequencies,and the more data can be transmitted at the same time.因为传输的数据能被分配到不同频率，所以带宽越宽频率越多，同一时间能被传输的数据就越多。

2.To distinguish where one character stops and another starts,the asynchronous communication mode uses a start and a stop bit. 为了辨别一个字符在什么地方结束而另一个字符在什么地方开始，异步通信模式使用一个起始位和一个结束位。

3.More technical manes for the serial port are RS-232C connector and asynchronous communication port.串行端口技术上又叫做RS-232C连接器和异步通信接口。

六．汉译英（每题5分，共25分）【4】最常用的网络服务是电子邮件。

The most commonly used (network) service is electronic mail.【1】从技术上讲，一台计算机是任何一种计算设备。

Technically speaking,the computer is any counting device.【2】一台计算机，也成为处理器，是一个计算机系统的“智能”部分。

The computer, also called a processor, is the “intelligence” of a computer system.【3】计算机系统可大致分为4个组成部分：硬件、操作系统、应用程序和用户。

An operating system is an important part of almost every computer system.A computer system can be roughly divided into 4 components:the hardware,the operating system.The applications programs and The users.【1】一个键盘，视频监视器和存储器被固定在微处理器上。

A keyboard,video monitor,and memory were attached to the microprocessor.【5】4G被定义为频谱高效使用，能提供通过空中的高速服务且能提供无缝的互操作性、漫游及真实内容的一种网络。

4G is defined as a network that is spectrum efficient and that can provide high speed services over the air and offer seamless interoperability,roaming,and really content.【2】一个模拟信号能在一固定范围内取得无穷多个可能的幅度。

通信英语第六版课后题答案1、19．Students will have computers on their desks ________ . [单选题] *A．in the future(正确答案)B．on the futureC．at the momentD．in the past2、He can’t meet his friends tonight because he _______ do homework. [单选题] *A. has to(正确答案)B. needC. have toD. don’t have to3、（）of the twins was arrested because I saw them both at a party last night. [单选题] *A. NoneB. BothC. Neither(正确答案)D. All4、While I _____ the morning paper, a headline caught my eye.. [单选题] *A. have readB. was reading(正确答案)C. had readD. am reading5、We have ______ homework today. （）[单选题] *A. too manyB. too much(正确答案)C. much tooD. very much6、There are many_____desks in the room. [单选题] *rge old brown(正确答案)B.old large brownrge brown oldD.brown old large7、You wouldn' t have caught such ____ bad cold if you hadn' t been caught in ____?rain. [单选题] *A. a, /B. a, aC. a,the(正确答案)D. /, /8、He often comes to work early and he is _______ late for work. [单选题] *A. usuallyB. never(正确答案)C. oftenD. sometimes9、—______ do you play basketball?—Twice a week.（）[单选题] *A. How often(正确答案)B. How muchC. How manyD. How long10、You can buy some pieces of bread from "_______". [单选题] *A. Bakery(正确答案)B. Travel AgencyC. LaundryD. Ticket Office11、If by any chance someone comes to see me, ask him to leave a _____. [单选题] *A. message(正确答案)B. letterC. sentenceD. notice12、Mary is interested ______ hiking. [单选题] *A. onB. byC. in(正确答案)D. at13、The organization came into being in 1 [单选题] *A. 开始策划B. 进行改组C. 解散D. 成立于(正确答案)14、41．—________ do you take?—Small, please. [单选题] *A．What size(正确答案)B．What colourC．How manyD．How much15、72．—? ? ? ? ? ? ? ? ? ? ? ??—Yes, please. I want a sweater. [单选题] *A．How muchB．Can I help you(正确答案)C．Excuse meD．What will you take16、—Who came to your office today, Ms. Brown?—Sally came in. She hurt ______ in P. E. class. （）[单选题] *A. sheB. herC. hersD. herself(正确答案)17、If it _______ tomorrow, I won’t go there. [单选题] *A. rains(正确答案)B. is rainingC. will rainD. would rain18、83．The school is? ? ? ? ? ? ?the hospital. [单选题] *A．withB．intoC．ontoD．opposite(正确答案)19、( ) What she is worried __ is ____ her daughter is always addicted to chatting online./; that [单选题] *A /; thatB of thatC about that(正确答案)D about what20、I have to _______ my glasses, without which I can’t read the book. [单选题] *A. put upB. put awayC. put downD. put on(正确答案)21、_______ your parents at home last week? [单选题] *A. IsB. WasC. AreD. Were(正确答案)22、It is my _______ to meet you here. [单选题] *A. pleasure(正确答案)B. pleaseC. pleasedD. pleasant23、10．Mum, let me help you with your housework, so you ________ do it yourself. [单选题] * A．don’t need to(正确答案)B．need toC．don’t needD．need24、_________ we don't stop climate change, many animals and plants in the world will be gone.[单选题] *A.AlthoughB.WhileC.If(正确答案)D.Until25、By the end of this month, all this _____. [单选题] *A. is changedB．will changeC. will have changed(正确答案)D. has changed26、1．________my father ________ my mother is able to drive a car. So they are going to buy one. [单选题] *A．Neither; norB．Both; andC．Either; orD．Not only; but also(正确答案)27、--Do you often go to the cinema _______ Sunday?--No, we _______. [单选题] *A. on; don’t(正确答案)B. on; aren’tC. in; doD. in; don’t28、—I can’t always get good grades. What should I do?—The more ______ you are under, the worse grades you may get. So take it easy!（）[单选题] *A. wasteB. interestC. stress(正确答案)D. fairness29、His father always _______ by subway. [单选题] *A. go to workB. go to schoolC. goes to bedD. goes to work(正确答案)30、Taking the subway is quite fast and cheap. It can _______ both time and money. [单选题] *A. savesB. save(正确答案)C. earnD. use。

通信英语第六版课后答案1、Tom sits _______ Mary and Jane. [单选题] *A. amongB. between(正确答案)C. onD. next2、2．The villagers want to have a bridge. Can this dream ________? [单选题] * A．come outB．get awayC．come true(正确答案)D．get out3、The people’s Republic of China _______ on October 1, 1 [单选题] *A. foundB. was founded(正确答案)C. is foundedD. was found4、--What’s the _______ like today?--Cloudy. [单选题] *A. skyB. airC. landD. weather(正确答案)5、Is there ____ for one more in the car? [单选题] *A. seatB. situationC. positionD. room(正确答案)6、All he _______ was a coat. [单选题] *A. had on(正确答案)B. had toC. had a restD. had a good time7、My dog is very _______. It is safe to touch it if you want to. [单选题] *A. luckyB. deliciousC. friendly(正确答案)D. helpful8、He usually ________ at 6:30 a.m. [单选题] *A. gets toB. gets up(正确答案)C. gets overD. gets in9、( ) Some students preferred to stay in the toilet ______ do morning exercises. [单选题] *A in order to notB in not order toC in order not to(正确答案)D not in order to10、I usually do some ____ on Sundays. [单选题] *A. cleaningsB. cleaning(正确答案)C. cleansD. clean11、98．There is a post office ______ the fruit shop and the hospital. [单选题] * A．atB．withC．between(正确答案)D．among12、Mr. Bliss became the first person to die in a car accident. [单选题] *A. 事故(正确答案)B. 竞赛C. 检阅D. 交易13、Don’t swim in the river. It’s too _______. [单选题] *A. interestingB. easyC. difficultD. dangerous(正确答案)14、They all choose me ______ our class monitor.（）[单选题] *A. as(正确答案)B. inC. withD. on15、So many people will _______ to their work after the Spring Festival. [单选题] *A. get inB. get onC. get offD. get back(正确答案)16、Sometimes only（）10 out of 500 or more candidates succeed in passing all the tests. [单选题] *A. as many asB. as few as(正确答案)C. as much asD. as little as17、—Why do you look so ______?—Our team won the basketball match!（）[单选题] *A. angryB. excited(正确答案)C. nervousD. unfair18、32．There are about __________ women doctors in this hospital. [单选题] *A．two hundred ofB．two hundreds ofC．two hundredsD．two hundred (正确答案)19、The man lost his camera and he ______ it now.（）[单选题] *A. foundB. is findingC. is looking forD. looks for(正确答案)20、We got up early this morning and took a long walk after breakfast. We walked _____ the business section of the city. [单选题] *A. amongB. betweenC. through(正确答案)D. upon21、( ) Do you have any difficulty _____ these flowers？I’d like to help you if you need.[单选题] *A in planting(正确答案)B for plantingC with plantingD to plant22、What surprised me ______ was that he succeeded. [单选题] *A. most(正确答案)B. mostlyC. almostD. at most23、He _______ getting up early. [单选题] *A. used toB. is used to(正确答案)C. is usedD. is used for24、75．Why not________ for a walk? [单选题] *A．go out(正确答案)B．to go outC．going outD．goes out25、In 2019 we moved to Boston,（）my grandparents are living. [单选题] *A. whoB. whenC. where(正确答案)D. for which26、He gathered his courage and went on writing music. [单选题] *A. 从事B. 靠······谋生C. 继续(正确答案)D. 致力于27、( )He killed the enemy guard and made away _________the villagers. [单选题] *A. with the helpB. with helpC. with help ofD. with the help of(正确答案)28、Don’t _______. He is OK. [单选题] *A. worry(正确答案)B. worried aboutC. worry aboutD. worried29、If we want to keep fit, we should try to _______ bad habits. [单选题] *A. keepB. haveC. getD. get rid of(正确答案)30、Last week they _______ in climbing the Yuelu Mountain. [单选题] *A. succeeded(正确答案)B. succeedC. successD. successful。

1.PCM原理抽样量化与编码:sampling,quantizing and coding话路:speech channel幅值: amplitude value抽样频率: sampling frequency抽样速率: sampling rate脉冲流: stream of pulses重复率: repetition rate编码过程: coding process模拟信号: analog signal传输质量: transmission quality数字通信: digital communication数字传输: digital transmission含噪声的环境: noisy environment传输路由: transmission path信噪比 :signal-to-noise ratio信号电平 :signal levels噪声功率: noise power地面系统: terrestrial system二进制传输: binary transmission反向操作: reverse operation8-位码序列: 8-digit sequence接受端: receiving terminal帧格式 :frame format同步字 :synchronization word实现这三项功能的方案 :the schemes for performing these three functions一串幅值: a series of amplitude values电话质量的话路 a speech channel of telephone quality一个8位二进制码的序列: a sequence of 8-binary digits理论上的最小抽样频率 :a minimum theoretical sampling frequency占据着300Hz到3.4kHz频率范围的话路: a voice channel occupying the range 300Hz to 3.4kHz 每个样值8-位码: 8-digits per sample value汽车点火系统的打火: the sparking of a car ignition system重复率为64kHz的脉冲流: the stream of the pulses with a repetition rate of 64kHz真实信号与噪声信号的关系: relationship of the true signal to the noise signal由卫星上接受到的信号 :the signal received from a satellite一条特定消息中的全部信息 :the complete informatian about a particular message被传信号的波形 :the shape of the transmitted signal由传输路由引入的衰减: the attenuation introduced by transmission path将抽样的幅值转换成一串脉冲的单元 :the unit that converts sampled amplitude value to a set of pulses涉及到第一路，第二路及其他各路的序列: a sequence relating to channel 1,2 and so on被称为同步字的独特码序列: a unique sequence of pulses called synchronization word地面系统 :terrestrial system脉冲的“有”或“无” : the presence or absence of the pulses高速的电子开关: a high-speed electronic switch时分多路复用器 :the time division multiplexer时分多路复用 :Time Division Multiplexer2.异步串行数据传输串行接口 serial interface显示终端 CRT terminal发送器与接收器 transmitter and receiver数据传输 data transmission数据流 data stream闲置状态 the idle state传号电平 mark level空号电位 space level起始位 start bit停止位 stop bitT秒的持续时间 duration of T seconds奇偶校检位 parity bit错误标志 error flag传输错误 transmission error下降沿 fallinf edge符号间的空格 intersymbol space接收机的定时 receiver timing本地时钟 local clock磁带 magnetic tape控制比特 control bit逻辑1电平 logical 1 level二进制数据 binary data明显的缺点 obvious disadvantage异步串行数据传输 asynchronous serial data transmission最为流行的串行接口 the most popular serial interface所传送的数据 the transmitted data发送器与接收器的时钟 the clocks at the transmitter and receiver电传机的时代 the era of teleprinter一个字符的点和划 the dots and dashs of a character符号间空格持续时间的三倍 three times the duration of intersymbol space被称为字符的比特组 the group of bits called characters由7或8个比特的信息组成的固定单元 the invariable units comprising 7 or 8 bits of information 由接收机本地产生的时钟 a clock generated locally by the receiver在字符后所收到的奇偶校检位 the received parity bit following the character起始位的下降沿 the falling edge of the start bit数据链路面向字符的特性 the character-oriented nature of the data link3.数据通信地下电缆 underground cable通信卫星 communication satellite微波设备 microwave facilities调制器与解调器 modulator and demodulator缓冲器 buffer定时信号 timing signals同步脉冲 synchronization pulses时隙 time slot移位寄存器 shift register传输媒体 transmission medium线形衰弱 linear attenuation信息安全 information security键盘 keyboard数据终端 data terminals某种类型的数据转换设备 some type of data conversion equipment视频显示终端 visual display terminal称为数据调制解调器的双向数据发送接收机 two-way data transmistter-receiver called a data modem 全双工的数据传输系统 full-duplex data trandmission system由数据处理器的运算速率所决定的速率 the rate determined by the operating speed of the data processor由接口部件来的定时信号 timing signals from the interface assembly磁心存储器 magnetic core memories线性衰减和时延特性 linear attenuation and delay characteristics传输损伤 transmission impairments语音中的冗余特性 the redundant nature of speech在数据发送器中的编码过程 coding process in the data transmitter二进制的不归零信号 binary nonreturn-to-zero signal4.互联网网络资源：network resource信息服务：information services远程终端：remote terminals互联的系统：interconnected systems命令：command电子邮件：electronic mail主机：host无线信道：wireless channels搜索工具：searching tools用户界面：user interface存取：access文本信息：textual messages协议：protocol超文本协议：hypertext protocol分布在全世界的计算机的巨大网络：gaint network of computers located all over the world主干系统：backbone system全国范围的网络：nationwild network电子会议：electronic conferences实时对话：live conversation最大的信息库the largest repository of the computers on the net网络设备资源：network facilities resources在网上的绝大多数计算机：the vast majority of the computer on the netUNIX操作系统：the UNIX operating system在因特网和你的PC机之间传送数据的方法：a way to move data between the internet and your PC 方便的搜索工具：the convenient searching tools联网的超文本协议：the network hypertext protocol5.光纤通信介绍光纤通信:optical fiber communications光源：light source波长：wavelength激光器：laser色散：dispersion传输介质：transmission medium多模光纤：multi-mode fiber长途干线：long-houl trunks单模光纤：singer-mode fiber带宽：bandwidth带宽用户：wideband subscriber纤维光学：fiber-optics商用技术：commercial technologe门限电流：threshod current光检测器：photodetector波分复用：wavelength multiplexing纤维光网络：fiber-optic network视频带宽：video bandwidth长途传输：long distance transmission中继距离：repeater spacing已装光纤的总长度：the total length of installed fiber长途通信系统：long-haul telecommunication system低衰减的石英纤维：the low-loss silica fiber衰减接近瑞利极限的光纤：fibers with losses approaching the Rayleigh limit室温下的门限电流：room temperature threshold currents较长波长区：the longer wavelength region用户接入工程：subscriber access project部件性能和可靠性的改进：improvements in component performance and reliability已安装的光纤系统的数据速率：data rates for installed fibre optic system每秒吉比特：gigabit per second range波分复用：wavelength multiplexing带宽用户环路系统：widebend subscriber loop system多纤连接器：multifibre connectors设计寿命：projected lifetime光源：light source单模光纤：single-mode fibre分布反馈式激光器：distributed-feedback laser信息容量：information capacity交换体系：switching hierarchy带宽业务：broadband services9.蜂窝式移动电话系统蜂窝式移动电话：cellular mobile telephone服务性能：services performance频谱：frequency spectrum频带：frequency band微处理器：microprocessor移动手机：mobile unit广播业务：broadcast servise天线：antenna子系统：subsystems移动用户：mobile subscriber服务能力：service capability利用率：utilization带宽：bandwidth单边带：single-sideband扩频：spread spectrum大规模集成电路：large scale integrated circuits蜂窝点：cellular site蜂窝交换机：cellular switch无线机架：radio cabinet呼叫处理：call processing频谱利用率：frequency spectrum utilization有限的指定频带：the limited assigend ferquency band 服务区：servise area复杂的特性和功能：complicated features and functions大规模集成电路技术：large-scale integraesd circuit technology试验性的蜂窝系统：developmental cellular system中央协调单元：central coordinating element蜂窝管理：cellular administration传统移动电话的运行限制：operational limitiation of conventional mobile telephone system 有限的服务能力：limitied service capability无线通信行业：radio communcation industry可用的无线电频谱：available radio frequency spectrum所分配的频带：the allocated frequency band移动收发信机：mobile transceiver技术上的可行性：techological feasibility严格的频谱限制：severe spectrum limitations调频广播业务：FM broadcasting services传播路径衰耗：propagration path loss多径衰耗：multipath fading电话公司地方局:telephone company zone offices10.全球移动通信系统个人通信 personal communcation通信标准 communcation standrads固定电话业务 fixed telephone services网络容量 network capability移动交换中心 mobile switching center国际漫游 international roaming宽带业务 broadband services接口转换 interface conversion频谱分配 frequency allocation模拟方式 analogue mode蜂窝通信原理 cellular communcation principe拥塞 jamming蜂窝裂变 cellular splitting基站 base station寄存器 register收费功能 billing function接入方法 access method突发脉冲传输方式 brusty transimission mode开销信息 overhead information切换算法 handover algorithms短消息服务 short message services技术规范 technical specificationtotal access communcation system 全接入的通信系统global mobile communcation system 全球移动通信系统time division multiple access 时分多址facsimile and short message services 传真和短消息服务fixed communcation networks 固定通信网络a more personalized system 更加个性化的系统the cost and quality of the link 链路的价格和质量market growth 市场的发展fixed telephone service 固定电话服务coxial cable 同轴电缆interface convision 接口转换cellular communcation priciple 蜂窝通信原则frequency reuse and cell splitting 频率复用和蜂窝裂变cochannel interference 共信道干扰theoretical spectual capability 理论上的频谱容量micro-cellular system 微蜂窝系统base station transceiver 基站收发信机subscriber register 用户寄存器burst transmission mode 突发脉冲传输模式overhead information 开销信息advanced handover algorithms 先进的切换算法facsimile and short message services 传真和短消息服务the GSM technique specications GSM技术规范说明一1 . 研究二进制的传输可见, 只要简单地去判别脉冲的“有”和“无”, 我们就获得了一条消息的全部信息。

通信专业英语考试习题通信专业英语考试习题是许多学习通信的学生常常会遇到的挑战。

这些考试题旨在测试学生对通信学科的理解和运用能力。

下面将介绍一些常见的通信专业英语考试习题，希望能对大家备考有所帮助。

一、选择题1. 下面哪个选项是正确的数据通信的定义？A. 使用数字信号而非模拟信号进行信息传输。

B. 使用光纤而非电缆进行信息传输。

C. 使用卫星通信而非微波通信进行信息传输。

正确答案：A2. 通过无线电波进行通信的主要问题是什么？A. 信号的传输距离有限。

B. 频谱资源有限。

C. 安全性问题。

正确答案：B3. 下面哪个选项是正确的带宽定义？A. 数据的传输速率。

B. 可用频谱范围。

C. 数据的传输距离。

正确答案：B4. 频率调制（FM）是通过改变哪个参数来传输信息？A. 频率B. 幅度C. 相位正确答案：A5. 下面哪个选项是正确的对称数字用户线路（DSL）的定义？A. 一种提供高速互联网接入的传输技术。

B. 一种用于长距离电话通信的传输技术。

C. 一种用于数字音视频传输的传输技术。

正确答案：A二、填空题1. OSI模型中，物理层主要负责______________。

答案：将数据转换为适合在通信信道上传输的形式。

2. ___________________是一种广泛用于局域网连接的传输媒介。

答案：双绞线（Twisted Pair）。

三、简答题1. 请简要解释一下分组交换和电路交换的区别和优缺点。

答案：分组交换和电路交换是两种不同的数据传输方式。

电路交换在通信双方建立连接后，会一直占用通信资源直到通信结束；而分组交换将数据划分为小的数据包（分组）进行传输，传输过程中不需要提前建立连接。

电路交换的优点是传输稳定，可以保证实时性，适用于实时语音和视频通信；缺点是资源占用高且不灵活。

分组交换的优点是资源利用率高，适合不同时刻多个用户共享资源；缺点是传输延迟较大，对实时性要求较高的应用不太适用。

2. 请简要解释一下TCP/IP协议族中的IP协议和TCP协议的作用。

校园通信试题及答案英语一、选择题（每题2分，共20分）1. What does "communication" mean in English?A. 交流B. 通讯C. 交通D. 教育2. The most common way of communication in a campus is:A. EmailB. Phone callC. Face-to-faceD. Social media3. Which of the following is NOT a benefit of effective communication?A. Improved understandingB. Enhanced relationshipsC. Increased isolationD. Better collaboration4. What is the best way to handle a disagreement in a group discussion?A. Ignoring itB. Arguing loudlyC. Listening to others' opinionsD. Interrupting others5. The term "non-verbal communication" refers to:A. Communication without wordsB. Communication through writingC. Communication via technologyD. Communication in a foreign language6. What is the purpose of a campus newsletter?A. To inform students about campus eventsB. To provide entertainmentC. To advertise productsD. To promote academic research7. In a group project, which of the following is the most important?A. Individual performanceB. Group collaborationC. DeadlinesD. Personal interests8. What is the role of a campus radio station?A. To broadcast lecturesB. To play musicC. To provide campus news and updatesD. To offer job opportunities9. How can you improve your listening skills in a classroom setting?A. By talking moreB. By taking notesC. By daydreamingD. By avoiding eye contact10. Which of the following is a good practice for effective communication?A. Interrupting othersB. Being open-mindedC. Being judgmentalD. Ignoring feedback二、填空题（每题1分，共10分）11. Effective communication requires both the sender and the ________ to be clear and concise.12. Non-verbal cues, such as body language and tone of voice, can ________ the message being conveyed.13. In a campus setting, ________ is often used to share information quickly among a large group of people.14. Active listening involves giving the speaker your full attention, ________, and responding appropriately.15. Conflict resolution in a group can be facilitated by________ and finding common ground.16. The campus intranet is a valuable resource for students to access ________ and other educational materials.17. Public speaking is an important skill that can be improved through ________ and practice.18. A well-structured email should include a clear subject line, a greeting, the ________, and a closing.19. The use of social media for campus communication has increased due to its ________ and accessibility.20. Feedback is essential for continuous improvement and should be given in a ________ and constructive manner.三、简答题（每题5分，共20分）21. What are the key elements of effective communication?22. Describe the process of a successful group project from initiation to completion.23. Explain the importance of feedback in the learning process.24. Discuss the role of technology in facilitating campus communication.四、论述题（每题15分，共30分）25. Analyze the impact of social media on campus communication and its implications for students and faculty.26. Discuss the challenges and opportunities of cross-cultural communication in a diverse campus environment.五、案例分析题（每题20分）27. A student group is working on a project and has a disagreement on the direction of the project. One member insists on their idea, while others want to explore different options. How would you suggest they resolve this conflict and ensure the project's success?答案：一、选择题1-5: A B C C A6-10: A B C B B二、填空题11. receiver12. enhance or distort13. social media14. nodding15. communication16. course materials17. feedback18. body of the message19. interactivity20. timely三、简答题21. Key elements of effective communication include clarity, conciseness, active listening, non-verbal cues, and appropriate feedback.22. A successful group project involves clear goals, division of labor, open communication, regular meetings, conflict resolution, and timely completion of tasks.23. Feedback is important in the learning process as it helps students understand their strengths and weaknesses, encourages improvement, and fosters a growth mindset.24. Technology plays a significant role in campus communication by providing platforms for instant messaging, social。

通信专业英语复习题Part B一、基础词汇1.Inductor电感2.Alternative Curren t交流电流3.DC直流4.Plastic 塑料5.LED发光二极管6.fuse保险丝7.Electric Potential 电势能8.V oltage电压9.Ohm’s Law欧姆定律10.Solid 固体12Rectifier 整流器13.Bias 偏置14.FET 场效应晶体管15.Frequency Drift 频率漂移16.Temperature Drift温度漂移2.OA 18.Gain 增益19.Couple耦合20.Feedback 反馈21.Crystal Oscillator晶体振荡器22.Conversion 转换23.Phase Detector鉴相器24.Local Oscillator 本机振荡器25.ANT SWITCH天线开关26V oltage Controlled Oscillator 压控振荡器27.Ethernet 以太网28.Configure 配置29.Digital Interface数字接口30.Frame Relay 帧中继31.TCP 传输控制协议32.PCS 个人通信系统33.DNS 域名服务器34.decode 解码35.Description概述3.36.Base Station基站37.Mobile 移动39.Transmitter 发送器40.Receiver接收器二、词汇缩写与翻译1.High Fidelity，缩写HI-FI，中文翻译高保真；2.Field Effect Transistor，缩写FET，中文翻译场效应晶体管；3.Central Processing Unit,缩写CPU ，中文翻译中央处理机；4.Carrier Sense Multiple Access，缩写CSMA，中文翻译载波监听多址访问；5.Digital to Analog Converter，缩写DAC ，中文翻译数模转换器；6.Arithmetic Logic Unit，缩写ALU，中文翻译算术逻辑单元；7.American National Standards Institute，缩写ANSI，中文翻译美国国家标准协会；8.Asynchronous Transfer Mode，缩写ATM，中文翻译异步传输模式；9.Bit Error Ratio，缩写BER ，中文翻译误码率；mon Traffic Channel，缩写CTCH，中文翻译公共业务信道；11.Enhanced Data rates for GSM Evolution，缩写EDGE，中文翻译增强型的GSM环境；12.Frequency Division Duplex，缩写FDD ，中文翻译频分双工；13.Global Positioning System，缩写GPS ，中文翻译全球定位系统；14.Media Access Control，缩写MAC ，中文翻译媒体访问控制；15.Mobile Broadcast Wireless Access，缩写MBWA ，中文翻译移动广播无线接入；16.Operation And Maintenance center，缩写OMC ，中文翻译操作维护中心；17.Orthogonal Variable Spreading Function，缩写OVSF ，中文翻译正交可变扩频函数；18.Primary Synchronization Code，缩写PSC ，中文翻译主同步码；19.Real Time Protocol，缩写RTP ，中文翻译实时协议；20.Total Access Communications System，缩写TACS ，中文翻译全接入通信系统；21.Universal Asynchronous Receiver/Transmitter，缩写UART ：中文翻译通用异步收发器；22.Wireless Fidelity，缩写WIFI ，中文翻译无线网；23.Wideband Code Division Multiple Access，缩写WCDMA，中文翻译宽带码分多址；Watch Dog Timer，缩写WDT，中文翻译监视计时器；24.Quadrature Amplitude Modulation，缩写QAM ，中文翻译正交幅度调制；25.Quadrature Frequency Shift Keying，缩写QFSK ，中文翻译正交频移键控；26.Signal to Noise Ratio，缩写SNR，中文翻译信噪比；27.Signaling Transport Converter，缩写STC，中文翻译信令传送转换器；28.Ultra Wideband，缩写UWB，中文翻译超宽频；29.Universal Subscriber Identity Module，缩写USIM ，中文翻译通用用户识别模块；三、词汇识别英文名称中文名称TD-SCDMA时分同步的码分多址Base Transceiver Station 基站收发信台Cell Broadcast Service小区广播业务Downlink Shared Channel 下行共享信道Forward Quick Paging Channel 前向快速寻呼信道Fast Fourier Transform 快速傅里叶变换LAN局域网Data Link Layer 数据链路层Integrated Services Digital Network 综合业务数字网LCR低码片速率PICH寻呼指示信道Signaling Connection Control Part 信令连接控制部分Traffic 交通Service Specific Connection Oriented Protocol 面向连接的特定业务协议TDMA时分多址接入Wireless Router 无线路由器BCCH广播控制信道Three layer switch三层交换机Topology Structure 拓扑结构Cyclic Redundancy Check 循环冗余检验Spreading Spectrum 扩频FER误帧率Frequency Hopping 跳频Mask code掩码Static Route table 静态路由表Wide Area Network 广域网Open Short Path First 开放最短路径优先IGP内部网关协议HDLC高级数据链路控制Authentication Center 鉴权中心AICH 捕获指示信道Access control layer访问控制层Adaptation Multiple Rate 自适应多速度Hybird Phase Shift Keying 混合相移键控Power Management IC 电源管理芯片Low Noise Amplifier 低噪放大器OSI开放式系统互联Signaling System #7 7号信号系统五、专业英语应用（一）阅读以下英文资料，回答相应问题。

话题16 通信[话题基础梳理] Ⅰ.话题相关词汇通讯操作1．邮递post2．发送send3．复制copy4．搜索search5．网上冲浪surfing6．打字type7．交流communicate8．连接link9．联系connect/contact设备名称1．信息information2．消息message3．电子邮件e­mail4．信letter5．收音机radio6．磁带tape7．电脑computer8．键盘keyboard9．屏幕screen10．因特网Internet11．网址website12．技术technique13．科学science14．科学家scientist15．安全safety通讯性质1．有用的useful2．快速地fast3．便利的convenient4．现代的modernⅡ.话题相关短语通讯操作1．打电话call up2．别挂电话hold on3．通过(电脑，电视，收音机) by means of4．发出give off5．打开(电器) turn on6．关上(电器) turn off7．花费时间spend/take time8．比较compare...with...9．把……分成divide...into...科技发展1．在将来in the future2．受欢迎be popular(for/as)3．多亏thanks to4．引来bring in5．感兴趣be interested in/show interest in6．用来be used for7．日日夜夜day and night8．安全性the safety/security of9．……的重要性the importance of10．运转不正常out of order11．个人电脑personal computerⅢ.话题常用句型1．手机可以帮助我们随时和父母取得联系。

Mobile phones can help us get in touch with our parents at any time.2．尽管网络可以使我们的生活有趣，但我们不应该浪费太多时间。