電信專業(yè)外語答案西電版

1、Lesson fiveII翻譯句子，注意find的不同詞義2. We find that the flow of current through metals is easy.我們發(fā)現(xiàn)電流非常容易流過金屬。（“find譯為 發(fā)現(xiàn)”）4. A large amount of natural gas has been found in this area.這個地區(qū)發(fā)現(xiàn)了大量的天然氣。（“find譯為 發(fā)現(xiàn)”）6. Given speed and time we can find out distance.給出速度和時間，我們能算出距離。（“find譯為算出”）m翻譯句子，注意use的詞類與詞義2.

2、 The use of a receiver is to receive radio wave.接收器的作用就是接收無線電波。（“us超名詞，譯為 作用”）4. Radio waves have found wide use in many field.無線電波廣泛應(yīng)用在許多領(lǐng)域。（“us建名詞，譯為 應(yīng)用”）6. China first learnt the use of magnets in compass.中國是第一個把磁鐵應(yīng)用在指南針上的國家。（“us系名詞，譯為使用”）IV畫出句子中作非謂語用的分詞或分詞短語或分詞獨立結(jié)構(gòu)，說明其在句中的語法作用，弁將句子譯成漢語2. We can

3、right the differential equations of the network using Kirchhoffs current and voltage laws.我們用基爾霍夫電流電壓定律寫出網(wǎng)絡(luò)的微分方程式。（分詞短語”作狀語）4. T=273+t denotes the absolute temperature, t being the temperaturecentigrade.T=273+t表示絕對溫度，t是攝氏溫度。（分詞”作狀語）6. Salt water is a mixture, both the salt and the water remaining se

4、parate compounds.鹽水是混合物，鹽和水都是單獨的化合物。（分詞”作狀語）8. Having a large number of free electrons, metals are good conductors.金屬有大量的自由電子，所以是良好的導(dǎo)體。（分詞短語”作狀語）10. A substance having a large number of free electrons is a good conductors.有大量自由電子的物質(zhì)是良好的導(dǎo)體。（分詞短語”作定語）12. The electromagnetic effect produced by electric

5、 current makes the motor run.電磁效應(yīng)是通過電流驅(qū)動電動機產(chǎn)生的。（分詞短語”作狀語）14. Heated, water will change to stream.水通過加熱會變?yōu)樗魵?。（分詞”作狀語）16. Nuclear reactions are taking place continuously inside the sun, giving the sun its constant supply of energy.核能反應(yīng)連續(xù)發(fā)生在太陽內(nèi)部，源源不斷的供給能量。（分詞短語”作狀語）V翻譯短語A.損失其一部分能量Lose a part of its en

6、ergyB.詳細考慮電路的兩個性質(zhì)Consider in detail two properties of an electric circuitC,圍繞導(dǎo)體的磁場A magnetic field surrounding the conductorA. the flux linking with the circuit與電路相交鏈的磁通in the direction coinciding with that of the current與電流方向相同的方向上known as Lenzs law成為楞次定律VI將句子譯成英語，劃線部分要求用分詞短語或分詞獨立結(jié)構(gòu) 來表示.當外加電壓改變時、電路

7、中的電流也將改變。The additional voltage changing the current will change as well as in the circuit.電流等于電壓除以電阻。The current is equal to the voltage divided by the resistance.在電路中流動的電流可容易地測出來。The current flowing in the circuit is measured out easily.uni數(shù)字19的前綴：onebitwotrithreequadrifourpentafivehexasixseptseve

8、noctoeightnonnine數(shù)學(xué)名詞：高等數(shù)學(xué)higher mathematics線性代數(shù)linear algebra復(fù)變函數(shù)complex variables積分變換integral alternate概率論與數(shù)理統(tǒng)計probability & mathematical statistics離散數(shù)學(xué)discrete mathematics組合數(shù)學(xué)combinatorial mathematics模糊數(shù)學(xué)fuzzy mathematics數(shù)學(xué)建模mathematical modeling隨機過程stochastic processes數(shù)學(xué)分析mathematical analysis矩陣

9、分析matrix analysis抽象代數(shù)abstract algebra邏輯代數(shù)logic algebra近世代數(shù)modern algebra布爾代數(shù)boolean algebra解析幾何analytic geometry矢量分析與場論 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.欄! IIi 息 Ilr i缶, i !生i;考系20 07 20 08學(xué)年 第1學(xué)期課程名稱專業(yè)英語試卷卷別A VB 專業(yè)_級班級考試方式閉卷 VM 本試卷共 八 大題（6頁），滿分100分，考試時間120分鐘。 請在答題紙上作答，在試卷上作答無效。一、根據(jù)英文單詞或詞組，寫出中文意思（本題共 15小題，每題1I Ii 分，共15分）Semiconductor 半導(dǎo)體II.! 2. amplitude 振幅simultaneous 同時i Islot槽II|15.protoc

16、ol協(xié)議|6.Bandwidth 帶寬ii7.Coaxial同軸8. Decode 解碼|99.harmonict皆波| I 10. Geostationary地球靜止軌道j j 11. flip-flop 觸發(fā)器!12. uplink frequency spectrum 上行鏈路的頻譜!113. peak-to-peak value峰一峰值home appliance 家電distributed system分布式系統(tǒng)二、根據(jù)英文縮寫，寫出英文完整形式及中文意思（本題共10分）5小題，每題2分，共1.ATM自動取款機2.WAN廣域網(wǎng)3.ISDN整體服務(wù)數(shù)位網(wǎng)路4.ISO國際標準組織5.PC

17、M脈沖編碼調(diào)制三、用連線使A欄與B欄匹配（本題共2大題，每題5分，共10分）Column ALAN) WANhost computerISOMicrowave relay2. Column Avoice channelMSC PSTNBS(5) CMS四、選擇適當?shù)脑~或詞組填空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(撥號)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（本題共5空，每空1分，共5分）欄息信 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(靈活性)of packet mode, (enabling,i ij j enable) only required information (to be conveyed, convey).i |I| |五、選擇適當?shù)脑~填空(本題共5小題，每題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閱讀理解(本題共5小題，每題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欄息信 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、將下列英文翻譯成中文(本題共12小題，每題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