电信专业外语答案西电版

1、Lesson fiveII翻译句子，注意find的不同词义2. We find that the flow of current through metals is easy.我们发现电流非常容易流过金属。（“find译为 发现”）4. A large amount of natural gas has been found in this area.这个地区发现了大量的天然气。（“find译为 发现”）6. Given speed and time we can find out distance.给出速度和时间，我们能算出距离。（“find译为算出”）m翻译句子，注意use的词类与词义2.

2、 The use of a receiver is to receive radio wave.接收器的作用就是接收无线电波。（“us超名词，译为 作用”）4. Radio waves have found wide use in many field.无线电波广泛应用在许多领域。（“us建名词，译为 应用”）6. China first learnt the use of magnets in compass.中国是第一个把磁铁应用在指南针上的国家。（“us系名词，译为使用”）IV画出句子中作非谓语用的分词或分词短语或分词独立结构，说明其在句中的语法作用，弁将句子译成汉语2. We can

3、right the differential equations of the network using Kirchhoffs current and voltage laws.我们用基尔霍夫电流电压定律写出网络的微分方程式。（分词短语”作状语）4. T=273+t denotes the absolute temperature, t being the temperaturecentigrade.T=273+t表示绝对温度，t是摄氏温度。（分词”作状语）6. Salt water is a mixture, both the salt and the water remaining se

4、parate compounds.盐水是混合物，盐和水都是单独的化合物。（分词”作状语）8. Having a large number of free electrons, metals are good conductors.金属有大量的自由电子，所以是良好的导体。（分词短语”作状语）10. A substance having a large number of free electrons is a good conductors.有大量自由电子的物质是良好的导体。（分词短语”作定语）12. The electromagnetic effect produced by electric

5、 current makes the motor run.电磁效应是通过电流驱动电动机产生的。（分词短语”作状语）14. Heated, water will change to stream.水通过加热会变为水蒸气。（分词”作状语）16. Nuclear reactions are taking place continuously inside the sun, giving the sun its constant supply of energy.核能反应连续发生在太阳内部，源源不断的供给能量。（分词短语”作状语）V翻译短语A.损失其一部分能量Lose a part of its en

6、ergyB.详细考虑电路的两个性质Consider in detail two properties of an electric circuitC,围绕导体的磁场A magnetic field surrounding the conductorA. the flux linking with the circuit与电路相交链的磁通in the direction coinciding with that of the current与电流方向相同的方向上known as Lenzs law成为楞次定律VI将句子译成英语，划线部分要求用分词短语或分词独立结构 来表示.当外加电压改变时、电路

7、中的电流也将改变。The additional voltage changing the current will change as well as in the circuit.电流等于电压除以电阻。The current is equal to the voltage divided by the resistance.在电路中流动的电流可容易地测出来。The current flowing in the circuit is measured out easily.uni数字19的前缀：onebitwotrithreequadrifourpentafivehexasixseptseve

8、noctoeightnonnine数学名词：高等数学higher mathematics线性代数linear algebra复变函数complex variables积分变换integral alternate概率论与数理统计probability & mathematical statistics离散数学discrete mathematics组合数学combinatorial mathematics模糊数学fuzzy mathematics数学建模mathematical modeling随机过程stochastic processes数学分析mathematical analysis矩阵

9、分析matrix analysis抽象代数abstract algebra逻辑代数logic algebra近世代数modern algebra布尔代数boolean algebra解析几何analytic geometry矢量分析与场论 vector analysis and fieldProfessional introductionIm major in Electronic and Information Engineering, so I will introduce it to you.Electronic and Information Engineering is the in

10、formation industry and theimportant foundation for one of the pillars. It circuits and systems, signal and information processing, microwave and electromagnetic field theory, to study various information, such as voice, text, images, radar, remote sensing and other information processing, exchange a

11、nd wireless, cable, fiber optic cable and other transmission, Based on this study and development of electronic and information systems.Professional training with the electronic technology and information systems knowledge base, be engagedin all kinds of electronic equipment and information systems

12、research, design, manufacture, application and development of high-level engineering talent. Mainlyinly engage in the electrical and electronic industry, computer industry, telecommunications and electronic energy supply in the field work. In addition, still can be engaged in the electronics industr

13、y, such as machinery manufacturing, automobile industry, chemical industry, mining industry, metallurgy industry, traffic control and other areas of workTrunk disciplines:electronic science and technology, information and communication engineering, computer science and technology.Main courses : Seri

14、es,circuit theory courses, computer technology courses, information theory and coding, Signals and systems, digital signal processing, electromagnetic theory, control theory, sensor technology.Major professional experiments : the professional completed at least one direction of a team of professiona

15、l experiments. Conferred degrees : Bachelor of Engineering.栏! IIi 息 Ilr i缶, i !生i;考系20 07 20 08学年 第1学期课程名称专业英语试卷卷别A VB 专业_级班级考试方式闭卷 VM 本试卷共 八 大题（6页），满分100分，考试时间120分钟。 请在答题纸上作答，在试卷上作答无效。一、根据英文单词或词组，写出中文意思（本题共 15小题，每题1I Ii 分，共15分）Semiconductor 半导体II.! 2. amplitude 振幅simultaneous 同时i Islot槽II|15.protoc

16、ol协议|6.Bandwidth 带宽ii7.Coaxial同轴8. Decode 解码|99.harmonict皆波| I 10. Geostationary地球静止轨道j j 11. flip-flop 触发器!12. uplink frequency spectrum 上行链路的频谱!113. peak-to-peak value峰一峰值home appliance 家电distributed system分布式系统二、根据英文缩写，写出英文完整形式及中文意思（本题共10分）5小题，每题2分，共1.ATM自动取款机2.WAN广域网3.ISDN整体服务数位网路4.ISO国际标准组织5.PC

17、M脉冲编码调制三、用连线使A栏与B栏匹配（本题共2大题，每题5分，共10分）Column ALAN) WANhost computerISOMicrowave relay2. Column Avoice channelMSC PSTNBS(5) CMS四、选择适当的词或词组填空Column Ban international standards organizationa network that provides communications across country or the entire world.a station which is used to receive and r

18、etransmit microwave signals.a computer which is located on a network and provides services to other nodes connected to the network.a network that provides communications within specific buildings or facilities.Column Bone of the typical mobile communication systemsthe medium used to carry calls from

19、 one point to anotherradio station used within mobile communications for transmission to mobiles or to other base stationspublic network which provides dial-up(拨号)access and has been primarily designed to carry voicean interface between the radio system and the PSTN, where calls to and from the mobi

20、le subscribers are switching（本题共5空，每空1分，共5分）栏息信 生 考1. The current which flows through Rl(is equal to, equals to) the input voltage ：Ui divided by Ri.!2. The switch, resistor and wire(are composed of, constitute) a circuit.iThe use of mobile telephone is quite(familiar with, familiar to) us in ouri i

21、 daily lives.I I 4. ATM retains(保留)all the flexibility(灵活性)of packet mode, (enabling,i ij j enable) only required information (to be conveyed, convey).i |I| |五、选择适当的词填空(本题共5小题，每题1分，共5分)The word multimedia is describe a mixture(混合)of hardware, softwareand applications.A. being used toB. usedC. using

22、toThe pulse is composed of states.A. oneB. two C. threeATM transfer information short packets called cells”(信元)a fixed length of 48 bytes plus five heads bytes.of, in B. in, with C. to, forThe function of the optical detector is to.A. convert optical signal to electrical signalconvert electrical sig

23、nal to optical signalthe electrical signal is applied to itEach channel unit in the BS is equipped radio transmitter, radio receiver, ancontrol unit.A. inB. with C. by阅读理解(本题共5小题，每题3分，共15分)Integrated CircuitIntegrated circuit, or IC is a combination of a few interconnected circuit elements such as t

24、ransistors, diodes, capacitors, and resistors produced in a single manufacturing | process on one and the same bearing structure, called the substrate, and intended to ! perform definite function involved in converting information. !The electrically interconnected components that make up an IC are c

25、alledIintegrated elements. If an integrated circuit includes only one type of components, such as only diodes or resistors, it is said to be an assembly or set of components.The principle of integrated circuit elements lies in the following. A great number of “setare produced simultaneously on a waf

26、er. Each set contains all the components such as transistors, diodes, and resistor which are interconnected with short fine metallic stripes deposited on the wafer surface. They make up an functional block. Each ICs of components is a ready integrated circuit. All ICs are regularly distributed on th

27、e wafer surface.ICs can be classified by function into two: circuits to be applied in digital systems and those to be applied in linear systems. The digital ICs are employed mostly in computers, electronic counters, frequency synthesizers and digital instruments. And the analog, or linear ICs operat

28、e over a continuous range, and include such devices as operational amplifiers.The invention of IC is a great revolution in the electronic industry. Sharp size, weight reductions are possible with these techniques; and more importantly, high reliability, excellent functional performance, low cost and

29、 low power dissipation can be achieved.Questions for text:What types of elements may integrated circuits possibly include?Tell some advantages of using integrated circuits.(2)Pulse-Code ModulationPulse-Code Modulation (PCM) is the most basic form of digital pulse modulation. In pulse-code modulation

30、, a message signal is represented by a sequence of coded pulses, which is accomplished by representing the signal in discrete form in both time and amplitude. The basic operations performed in th transmitter of PCM are sampling, quantizing, and encoding. The quantizing and encoding operations are us

31、ually performed in the same circuit, which is called analog-to-digital converter. The basic operations in the receiver are regeneration of impaired signals, decoding, and reconstruction of the train of quantized samples. In what follows, we describe the various operations that constitute a basic PCM

32、 system.Sampling. The incoming message signal is sampled with a train of narrow rectangular pulses.Quantization. The sampled version of the message signal is then quantized, thereby providing a new representation of the signal that is discrete in both time and amplitude.Encoding. Any plan for repres

33、enting each of this discrete set of sample values as a group of particular binary numbers is called encoding.Regeneration. The most important feature of PCM systems lies in the ability to control the effects of distortion and noise produced by transmitting a PCM signal through a channel. This capabi

34、lity is accomplished by reconstructing the PCM signal by means of a chain of regenerative repeaters located栏息信 生 考sufficiently close spacing along the transmission route.Decoding. The decoding process involves generating a pulse, the amplitude of which is the linear sum of all the pulses in the code

35、 word, with each pulse being weighted by its place value (20,21,22,A-1) in the code, where R is the number of bits per sample.Filtering. The final operation in the receiver is to recover the messagesignal by passing the decoder output through a low-pass filter whose cutoff frequency is equal to the

36、message bandwidth W.Questions for text:What is “ PCMort for?What are the basic operations performed in the transmitter of PCM?What are the basic operations performed in the receiver of PCM?七、将下列英文翻译成中文(本题共12小题，每题3分，共36分)We shall define voltage “acrossan element as the work done in moving a unit char

37、ge (+1C) through the element from one terminal to the other.The circuit designers are not generally interested in the internal components of an integrated circuit, but only in the performance of the unit as a whole.A computer consists of an input/output (I/O) device, memory, a control section, and an arithmetic and logic unit (ALU), which is the computational element.Because of ever more powerful computer systems and the experience of creative programmers, multimedia is truly changing the way people are using computers.When a call bet