电子通信专业英语 课后习题答案 (选择题加翻译题) 李霞、王娟主编
电子与通信专业英语-电子工业出版社-李霞翻译
电子与通信专业英语-电子工业出版社-李霞翻译Unit 13（1）微积分在解析几何的帮助下，被证明能够有效的解决许多早先无法解决的问题。
（2）在17世纪的许多重大数学发明中，毫无疑问最杰出的就是微积分。
（3）当法国数学家奥古斯丁*路易斯*柯西发展相互一种可接受的极限理论，并由此定义了连续性，微分和极限概念下的定积分，这成为1821 年数学史上的巨大飞跃。
4）数学分析是高等数学中的最重要分支中的一个，它的主要目的是研究变量和他们之间的关系。
5）自然数学或技术科学的一个主要目的是建立考虑的过程中的变量之间的关系并用数学描述。
6数学方法是物理学、机械学、工程学和其他自然科学的基础，对所有学科来说，数学是有利的理论和应用工具，没有数学就不可能科学计算工学和技术。
Unit 21）描述精确的随机变量的分析需要许多信息，而且描述两个或以上变量的联合发布需要更多的信息2）二项分布和泊松分布在所有离散分布中应用最广泛的，由于他们的概率分布在统计性质控制中的重要（作用），这种概率分布对工程人员来说是非常重要。
3）对于任何随机变量，在两个点分布函数的差异是随机变量取这两点间（或端点）的值的概率4）一般来说，随机事件的概率P在进行大量的重复实验时能以均值来确定，该事件发生的次数是p 乘以实验次数5）在统计学中，将任何观察过程叫做实验是一个习惯6）如果在特定的现实情况下，某时间确定不能发生，那么称之为不可能事件Unit 34）当运放周围有反馈时，输入阻抗和反馈阻抗的比值决定了电路的闭环增益6）运放是个极为高效和通用的设备，它的应用范围覆盖了广阔的电导工业满足了特殊传输函数，模拟器件，模拟计算和特殊系统设计的需要。
Unit 41）如果一个线性系统的输入是正弦波，输出将也是正弦波，并且输出与输入频率相同。
2）正如我们能将任何信号解释成一系列尺度位移变换的脉冲和一样，我们也能将任何信号分解成一系列不同频率的正弦（尺度和位移变换）的和3）—个信号被公式化成一个包含或多个变量的函数，并用于传达物理现象本质中的信息4）采样定理说明：如果一个连续信号x（t）的最高频率f max,那么如果采样频率f s大于2f max，则x（t）可以由它的采样序列x（nT）完全恢复‘5）事实上，如果离散时间序列是绝对可和的，那么在连续事件情况下，他的光谱就是一个有限且连续的函数。
电子与通信专业英语 第三单元翻译
数字系统设计结构数字系统也许会在许多不同的抽象层次上进行学习和设计，从一个纯粹的没有指定硬件细节的性能模型，到一个只有指定的物质材料构架而成的物理模型。
表一列出了几种抽象设计的层次。
表一系统设计的抽象层次体系1、系统和寄存器层次在最高层次上数字系统看是一个或更多的功能模块组合。
每个模块的性能不需要指定的实现细节来描述。
例如，台式电脑从系统层次上看由微处理器、存储器模块、监控控制电路、键盘、打印机和其他外围设备组成。
从寄存器的层次上看，一个数字系统可以被看作为具有通过信号线互相传递信息并存储信息功能的寄存器的集合。
系统通过在寄存器之间的这些信号线转换来对信息进行加工处理。
某些情况下，信息通过指定的一个或者多个功能模块，实现信号在寄存器之间的传递。
如图1（a）和(b)所示，数字系统的寄存器模型计算一系列的二进制数字的和，并且每次提供一个数作为系统的输入。
对于系统层次，我们所知的是系统的基本功能，对于计算来说：总数=∑输入如图1（b）所示，从寄存器的角度上看，整个系统由一个寄存器A和一个加法器电路组成。
系统第一次用控制清零信号寄存器A，加上每一次输入值input，并用控制存储信号将新的和值替代寄存器A 的原来存储的内容。
从而,一系列数字便通过按照适当的顺序执行以下寄存器实现了求和计算。
清零：0→A存储：A←A+输入（a）系统层次（b）寄存器层次图一：数字系统同求和模型2、门电路层次在数字系统的最底层，其动作本指定为一组可以通过逻辑电路硬件实现的转换成代数的逻辑方程。
最小的数字逻辑硬件实现单元被称为门电路。
门电路是一个实现代数转换的基本运算的开关元件。
如图2所示，逻辑方程通过硬件内部的门电路相互连接成组合逻辑电路实现。
注意图中逻辑电路有六个门电路。
例中的输入标记为x1,……，x5，输出为f(x1,……,x5)仅仅是实现输入信号当前的值。
因此，组合逻辑电路的一个特色为对之前的输入无记忆。
对组合逻辑电路的分析成了本文的主要内容。
2022年电大英语教科书课后翻译题参考答案
电大英语3教科书课后翻译题参照答案back homeP21You’re not in my shoes. You certainly can’t know what my problem is. Even then there must have been many people who did not know how the idea came into being.I’m dying of hunger. May I ha ve something to eat?I used to go to sleep late at night when I was young, but now I’m old and not used to this kind of life anymore.P41Sorry, the book you’ve found for me is not the one I want.The man you met yesterday is zhang ming, whose brother works in our factory, too.Almost everyone who is anybody (a somebody) attended the party.The number of periodicals that a library subscribes to is usually based on the number of readers.P63To open a current account in a bank is good for day to day expenditure.I can count on you for the time being, but I need some guarantees.We must face up to these problems and find solutions to them so that the deal won’t fall through at the last minute.You’ve been received loud and clear, and they will catch up on th eschedule.If we put another one million us dollars into this project, what’ll you come up with on your side of the bargain.P85If I were you, I would hold on a little longer.If it hadn’t been for you, the deal wouldn’t have got into such a mess! It’s the president who should take the responsibility, not the foreign minister.It’s up to him to tell you what to do.Neither you nor I should be too much concerned about it in the long run.P108The reason why I can’t put up with her is that she’s intereste d in nothing but shopping.In our country, there are still many areas where people live only on plain and simple food.Do yu still remember the night when we graduated from university?It will do you good to go to the countryside and experience life there.P129A fire bomb went off at the railway station. If it hadn’t been at 3:30 early in the morning, many people might have been killed.Did things work our okay with the contract problems?Have you got any other evidence to further back up your story?We h aven’t got an update on the earthquake in the western region.P151Interestingly, what you said sounds just the same as what xiao zhang said. Obviously, I have to follow yur example and try it again.I was looking for the document carefully in the office this morning, but couldn’t find it.Why on earth do you keep asking me this question?P174If only I were in a position to speak personally to the general manager, but I just don’t have the chance.Two days ago I gave him my advice that he (should) deal with the issue himself.Party a still insists that this regulation (should) be included in the agreement.“tell zirong it is absolutely essential that he keep a close watch on what the enemy may do,” stressed the commander.P195Brighton lies on the south coast of england, across the sea from france.I just can’t get it out of my mind where we should set up our company.I know we shouldn’t walk past this chance, but shall we sleep on it for the monent?When a foreigner first arrives in china, he must feel up against things,and it will take him some time to fit in.P217When he’d just finished quarreling with wang qiang, he turned on me. Jack denied having made a mistake, and insisted on sorting things out all by himself.Lazing about in class is one of the main reasons why you haven’t done will in your studies.He was accused of interfering in other people’s private life.P239It’s rather late now, but it’s still raining cats and dogs. Do you think it’ll clear up by dinner time?Apart from the unsuitable colour, the suit also cost me a lot of money. It is a well-known fact that, generally speaking, people without appropriate qualifications cannot find good jobs.For the sake of having a job, some people are willing to work work even though they are badly paid.P261What you said has left me completely in the dark.Could you spare me a couple of minutes for a paper on King lear?If we go on like this, we will only end up with failure.The picture reminds me of the days when we were in middle school together.P285Having nothing to do in the evening, he has to fiddle with his TV set.I found it quite amusing to see him having kittens.My personal opinion has nothing to do with how I do my job.The government has just published a white paper on ways to control increasing prices.P309The supporters of united felt themselves resigned to the fact that their team had lost ot Arsenal.He was very pleased to see his opponent’s reputation ground into the dust. Being kept well informed of the development of the event, we know what measures to take for the next step.Although he is the chairman, he has no real authority, and people just take no notice of him.P331I’m a bit scared at the thought of the interview tomorrow.Being very confident he doesn’t think there’s anything he’s not capable of.You must concentrate on your studies, or you’ll drop out.He felt obliged to leave after an unpleasant quarrel with his boss.P355You must ensure that the price is kept as low as possible.Cheap used to mean attractive, but this idea is outdated nowadays.It goes without saying that it is not enough only to pay lip service to the importance of work.The reason why this product is popular is that its advert makes people often associate it with the love of a mother.P380A nation who only keeps a hold of their own traditions will not become a great nation.This government does not seem to have brought about any new changes to the country.His mistake is that he has little respect for the rest of the group.P402As public opinion was turn against them, they had to stop their action for the time being.It is very hard to imagine what the life, which is cut from the everyday world, would be like.I know this is bound to happen sooner or later. But don’t worry. I’m prepared for it.His desire to take over everything cannot be satisfied by anyone.。
电子与通信专业英语第二版李霞 课后翻译
active有源的Binomial dist二项式分布conceptual概念的discrete离散的fluctuation波动inflection变形additivity叠加性buffer.缓冲器congestion拥塞discretize使离散的formalism形式infrared红外线的advocate主张者by means of依靠consensus一致同意disperse分散formula公式，规则inherent固有的algebra代数学by-product副产品，出乎意料的结果consist of由什么组成disruptive使破裂的Fourier series傅里叶级数integration积分algorithm算法calculus微积分constituent组成的distort歪曲freak反常的intensity亮度alleviate减轻capacitor电容器contour轮廓distortion扭曲fulcrum杠杆的支点interdisciplinary跨学科的对比度增强distributive分配的fuzzy模糊的interference干扰alphabetical字母的carrier载波contrast enhancemenalternative另一个可选择的cascade串联converge收敛disturbance干扰GaAs砷化镓interpratation说明 解释amendment改善cautery烙convolution卷积DLC数据链路控制gate门intuitive直觉的amplitude振幅CCSA中国通信标准协会coordinate坐标edge边缘generator发生器inverting input反相输入端AMPS高级移动电话系统CD光盘cosine余弦electributive心电图give rise to引起investigate调查，研究antenna天线CDMA码分多址couple耦合electromagnetic电磁的GPRS通用分组无线业务ionosphere电离层aperiodic非周期的CDMA码分多址cumulative累加的electromagnetic电磁的gray level灰度IP互联网协议approximation近似值cellular细胞的curriculum课程emulate模仿ground使接地jeopardize危害arbitrary任意的channel频道cut-off frequency截止频率encapsulate封装harmonic谐波JPEG联合图像专家组argument自变量channel信道decimal part小数部分encoder译码器hemorrhage出血LAN局域网arithmetic算术channelizatio信道化deficiency缺乏 不足encompass包围heterogeneity不同成分latch闭锁artificial intelligence人工智能circuitry电路，线路degradation退化enormous巨大的hierarchical分等级的lay the foundation给。
电子信息专业英语习题答案
A第一单元元件与定律．课文译文电阻器、电容器和电感器在电子电路中，电阻器、电容器和电感器是非常重要的元件。
电阻器和电阻电阻器是二端口元件。
电阻是阻止电流流动，更确切地说，是阻止电荷流动的能力。
在国际单位制中，电阻用欧姆来度量。
希腊字母Ω是欧姆的标准符号。
较大的电阻一般用千欧和兆欧来表示。
模拟这种特性常用的电路元件是电阻器。
图1.1表示电阻器的电路符号，R表示电阻器的电阻值。
图1.1 电阻器的电路符号为了进行电路分析，我们必须在电阻器中指明电流和电压的参考方向。
如果我们选择关联参考方向，那么电压和电流之间的关系是：v=iR (1.1) 这里v是电压，其单位是伏特， i是电流，其单位是安培，R是电阻，其单位是欧姆。
如果选择非关联参考方向，我们必须写成：v=－iR (1.2) 用在公式（1.1）和（1.2）中的代数式就是著名的欧姆定律。
欧姆定律表示了电压作为电流的函数。
然而，要表示电流是电压的函数也是非常方便的。
欧姆定律是电阻两端的电压和电流间的代数关系。
电容器和电容电能可以存储在电场中，存储电能的装置叫电容器。
电容器存储电能的能力叫做电容。
图1.2表示电容器的电路符号。
电容的电路参数用字母C表示，用法拉来度量。
因为法拉是相当大的电容量，实际上电容值通常位于皮法和微法之间。
当电压随时间变化时，电荷的位移也随时间变化，引起了众所周知的位移电流。
在终端，位移电流和传导电流没有区别。
当电流参考方向和电压参考方向是关联参考方向时，电流正比于电容两端电压随时间的变化率的数学表达式为：(1.3)这里i的单位是安培，C的单位是法拉，v的单位是伏特，t的单位是秒。
电感器和电感众所周知，电感是电子电路中的模块之一。
所有的线圈都有电感。
电感是抵抗流过线圈电流的任何变化的性质。
电感用字母L表示，其单位是亨利。
图1.3表示一个电感器。
当电流和电压的参考方向关联时，有(1.4)这里v的单位是伏特，L的单位是亨利，i的单位是安培，t的单位是秒。
通信英语（第四版）课后习题名词解释答案加翻译句子
通信英语（第四版）课后习题名词解释答案加翻译句子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 ofintersymbol 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 offices 10.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。
《电子技术专业英语》试题及参考答案_A卷
2011 至2012 学年第1 学期《电子技术专业英语》试卷（A ）1. There can be no doubt the 1900s is remembered as the electronic century.A. whichB. thatC. what2. Electrons, as one knows, are minute charge of electricity.A. negativeB. positiveC. reverse3. A resistor is an electrical component that the flow of electrical current.A. increasesB. changesC. resists4. Frequency is the reciprocal of the period, if the period is 4ms, then the frequency would be .A. 4m/sB. 0.25KHzC. 25Hz5. The sixth power of two is .A. 12B. 36C. 646. A capacitor will block current, but appears to pass current by charging and discharging.A. DC…ICB. AC…DCC. DC…. AC7. For a 4-band resistor with “color code”, the first band is the values.A. hundredsB. tensC. ten8. An electronic device often used for amplifying voltage and current is _____________.A. transistorB. conductorC. diode9. In a diode, current flows in ________ direction across the junction.A. only oneB. twoC. three10. A __________ amplifier provides signal amplification with little or no distortion, so that the output is proportional to the input.1.电压有效值（）2.微处理器（）3.电子元件（）4.公共端插孔（）5.外阻（）6.放大器（）7.脉冲直流（）8.电压源（）9.系统设计（）10.逻辑运算（）（1）internal resistance （2）pulsating DC （3）voltage sources（4）logic circuits （5）RMS voltage （6）logic operation（7）external resistance （8）number systems （9）Microprocessor（10）amplifier （11）common jack （12）digital logic circuits（13）system design （14）anode of diode （15）electrical components三、短语翻译（每小题2 分，共20 分）1. Passive electrical circuits2. Assembler language3. The address bus4. Analog multimeter5. Semiconductor material6. chip holders7. peak-to-peak voltage8. dual-trace oscilloscope9. Flowchart10. Signal generator1 / 4四、句子翻译（每小题5 分，共20 分）1. The impact of digital integrated circuits on our modern society has been pervasive. Without them, the revolution of current computer and information-technology would not exist.2. A multimeter is a general-purpose meter capable of measuring DC and AC voltage, current, resistance, and in some cases, decibels.3. When measuring current, the circuit must be opened and the meter inserted in series with the circuit or component to be measured.4. Moore's law, which predicted that the number of devices integrated on a chip would be doubled every two years, was accurate for a number of years.五、综合运用（每小题20分，共20 分）C is commonly considered to be a structured language with some similarities to Pascal. In C, a block of code is a logically connected group of program statements that can be treated as a unit. You can create a block of code by placing lines of code between opening and closing curly braces. For example:if(x<10){printf (“too low, try again”);reset_counter(-1);}The two statements after "if" that are between the curly braces are executed if x is less than10. These two statements with the braces represent a block of code. They are linked together:one of the statements cannot execute without the other also executing.(将上面的短文翻译成中文)2 / 43 / 42011 至2012 学年第 1 学期《 电子技术专业英语 》试卷（ A ）1. There can be no doubt the 1900s is remembered as the electronic century.A. whichB. thatC. what2. Electrons, as one knows, are minute charge of electricity.A. negativeB. positiveC. reverse3. A resistor is an electrical component that the flow of electrical current.A. increasesB. changesC. resists4. Frequency is the reciprocal of the period, if the period is 4ms, then the frequency would be .A. 4m/sB. 0.25KHzC. 25Hz5. The sixth power of two is .A. 12B. 36C. 646. A capacitor will block current, but appears to pass current by charging and discharging.A. DC …ICB. AC …DCC. DC …. AC7. For a 4-band resistor with “color code ”, the first band is the values.A. hundredsB. tensC. ten8. An electronic device often used for amplifying voltage and current is _____________.A. transistorB. conductorC. diode9. In a diode, current flows in ________ direction across the junction.A. only oneB. twoC. three10. A __________ amplifier provides signal amplification with little or no distortion, so that the output is proportional to the input.A. nonlinearB. linearC. electronic 1.电压有效值（ ） 2. 微处理器（ ） 3.电子元件（ ） 4.公共端插孔（ ） 5.外阻（ ） 6.放大器（ ） 7.脉冲直流（ ） 8.电压源（ ）9.系统设计（ ） 10.逻辑运算（ ）（1）internal resistance （2）pulsating DC （3）voltage sources （4）logic circuits （5）RMS voltage （6）logic operation （7）external resistance （8）number systems （9）Microprocessor （10）amplifier （11）common jack （12）digital logic circuits （13）system design （14）anode of diode （15）electrical components 三、短语翻译（每小题 2 分，共 20 分）1. Passive electrical circuits 无源电路2. Assembler language 汇编语言3. The address bus 地址总线4. Analog multimeter 模拟万用表5. Semiconductor material 半导体材料6. chip holders 芯片插座7. peak-to-peak voltage 电压峰-峰值8. dual-trace oscilloscope 双踪示波器 9. flowchart 流程图 10. signal generator 信号发生器1. The impact of digital integrated circuits on our modern society has been pervasive. Without them, the revolution of current computer and information-technology would not exist.数字集成电路对现代社会的影响是普遍深入的，没有数字集成电路，将不存在当代的计算机和信息技术革命。
电子信息专业英语答案中英文对应
电子信息专业英语答案中英文对应Unit 1 电子学：模拟和数字Unit 1-1第一部分：理想运算放大器和实际限制The approach to such a situation is to be methodical, and take the necessary time to read and understand each definition in the order that it is listed. Without a real appreciation of what each means, the designer is doomed to failure. The objective is to be able to design a circuit from the basis of the published data, and know that it will function as predicted when the prototype is constructed.In order to discuss the ideal parameters of operational amplifiers, we must first define the terms, and then go on to describe what we regard as the ideal values for those terms. At first sight, the specification sheet for an operational amplifier seems to list a large number of values, some in strange units, some interrelated, and often confusing to those unfamiliar with the subject. It is all too easy with linear circuits, which appear relatively simple when compared with today’s complex logic arrangements, to ignore detailed performance parameters which can drastically reduce the expected performance.2为了讨论运算放大器的理想参数，我们必须首先定义一些指标项，然后对这些指标项讲述我们所认为的理想值。
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本文当前边为选择题的答案，后边为翻译题的答案选择题一单元、1.Mathematical modelling and(a developments in computer)2.For an engineering (d the main objective)3.Which one of the (c the exercises are only)4.Which is not the (b geometry)5.(a Fourier series) is vital to二单元．1.The theoretical foundation (c the theory of probability)2.For engineering students (c interpretation)3.Find which is not (b the number of bits used to )4.In general, the behavior of (d probability density function)5.Random variables with (c from uniformly distributed)三单元．1.An ideal operational amplifier has (a infinite gain, infinite bandwidth, infinite input)2.One of the summing (b no current flows into )3.For an inverting amplifier (a the output voltage)4.Which is not true (a it is of no use)5.For a voltage follower (c it has unity gain)四．1.A continuous signal (a an analog signal)2.A system is called (c additivity and homogeneity)3.The unit impulse signal (b the differential of)4.Which of the following statements best (b it is a linear)5.Any signal can be (the sum of a series of shifted and scaled unit impulse function) 五、1、the beginning of (d.maxwell’s equations)2、(b.george southword and )show experimentally3、basic cicuit theory(c.lower frequency)4、advantage to using RF/microwaves (e a high-speed)5、RF/microwaves (c.modulating )6、microwaves clothes dryers are designed (resonance of conductive)六.1.By using the (b -5.25)2.The first step (c sample it at discrete_3.The following descriptions about (b the study of )4.Regarding the advantages (a the transmission)5.The application areas(b eognitive science)七.1.According to the author (b image processing are )2.A logic place (a recognition of)3.(b image enhancement) is one of4.Image restoration is (c image restoration is basically)5.In the context (c involves extracting)6.According to the text (a is very complex)十一．1.The function of a (b to allow users)2.Which of the following about layering (b the input module)3.The source (c convert the input)4.The analog signal waveform (d all of above)5.The purpose of (c to place signal)6.In 2-PAM (d +-1)7.When the receiving (b strips off the DLC header and trailer)十二、1.In order to form (b seven)2.The first commercially (b TDMA)3.In a CDMA (c special code)4.The spreading factor(a the transmission)5.Which of the following statement about RAKE(c RAKE's)6.In the uplink (b it can ensure)7.Spread-spectrum （d transform original)8.When the network(d move some users to other less)十三．1.The ideal,originated with (c didn't have)2.(a infrared) light is chosen3.The distinguishing characteristic (d use different wavelengths in different bands)4.Which one of the (d no IPR)5.Which sentence is(c a receiver needs)十四．1.Internet was originally (b a small group)2.TCP/IP model (c layer 5 and layer 6)3.(c network) layer transfers4.HTTP is used to (b transfer Web)5.TCP, as an (d all of above)十五．1.The component that is (b IPTVCD)2.In the digital (c transmitting only)3.A television gate (d all of above)4.The media gateway (d end users)5.The function of IP(b transfer the television)6.When sending the same (c multicast)7.For unicast transmission(c 20 Mbps)Unit 13(1）The calculus微积分在解析几何的帮助下，被证明能够有效的解决许多早先无法解决的问题。
（2）Of the many在17 世纪的许多重大数学发明中，毫无疑问最杰出的就是微积分。
（3）A great forward当法国数学家奥古斯丁*路易斯*柯西发展相互一种可接受的极限理论，并由此定义了连续性，微分和极限概念下的定积分，这成为1821年数学史上的巨大飞跃。
4) Mathematical analysis数学分析是高等数学中的最重要分支中的一个，它的主要目的是研究变量和他们之间的关系。
5）The main purpose自然数学或技术科学的一个主要目的是建立考虑的过程中的变量之间的关系并用数学描述。
6）Mathematical methods数学方法是物理学、机械学、工程学和其他自然科学的基础，对所有学科来说，数学是有利的理论和应用工具，没有数学就不可能科学计算工学和技术。
Unit 21）A lot of描述精确的随机变量的分析需要许多信息，而且描述两个或以上变量的联合发布需要更多的信息2）The binomial二项分布和泊松分布在所有离散分布中应用最广泛的，由于他们的概率分布在统计性质控制中的重要（作用），这种概率分布对工程人员来说是非常重要。
3）For any random对于任何随机变量，在两个点分布函数的差异是随机变量取这两点间（或端点）的值的概率4）In general一般来说，随机事件的概率P在进行大量的重复实验时能以均值来确定，该事件发生的次数是p乘以实验次数5）In statistics在统计学中，将任何观察过程叫做实验是一个习惯6）If an event如果在特定的现实情况下，某时间确定不能发生，那么称之为不可能事件Unit 34）When feedback is.当运放周围有反馈时，输入阻抗和反馈阻抗的比值决定了电路的闭环增益6）The operational amplifier运放是个极为高效和通用的设备，它的应用范围覆盖了广阔的电导工业满足了特殊传输函数，模拟器件，模拟计算和特殊系统设计的需要。
Unit 41)If the input 如果一个线性系统的输入是正弦波，输出将也是正弦波，并且输出与输入频率相同。
2)Just as we正如我们能将任何信号解释成一系列尺度位移变换的脉冲和一样，我们也能将任何信号分解成一系列不同频率的正弦（尺度和位移变换）的和3) A signal一个信号被公式化成一个包含或多个变量的函数，并用于传达物理现象本质中的信息4)Nyquist sampling采样定理说明：如果一个连续信号x（t）的最高频率f max,那么如果采样频率f s大于2f max，则x(t)可以由它的采样序列x(nT)完全恢复‘5)In fact事实上，如果离散时间序列是绝对可和的，那么在连续事件情况下，他的光谱就是一个有限且连续的函数。
6)Systems are如果每个有界输入都得到一个有界输出，那么系统是稳定的。
如果H（x）的所有极点都在Z域的单位圆内，那么离散时间系统也是稳定的。