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1、第 1 页 共 7 页专业英语复习卷 1使用班级：电信系一一Vocabulary(词汇词汇)(一) Put the following words and phrases into Chinese. (写出下列词组的汉语写出下列词组的汉语) 1.semiconductor devices 2.eletric field3.polarity switch4.layout design5.reverse binational logic7.machine-language code8.cable TV programs9.fiber optic10. spectrum efficiency (二二
2、) Put the following words and phrases into English. (写出下列词组的英语写出下列词组的英语) .1.调频2.感抗3.双极型晶体管4.电子与空穴5.低功耗6.十进制数字系统7.软件开发人员8.阴极射线管9.帧中继10. 国际漫游能力二二Translation（翻译）（翻译）装 订 线班级： 学号： 姓名： 第 2 页 共 7 页1.Resistors are used to limit current flowing to a device, thereby preventing it from burning out, as voltage
3、dividers to reduce voltage for other circuits, as transistor biasing circuits, and to serve as circuit loads.2.A multimeter is a general-purpose meter capable of measuring dc and ac voltage, current, resistance, and in some cases, decibels. 3.The transformers job is to reduce the 7200 volts down to
4、240 volts that make up normal household electrical service. 4.The router basically reads the destination address on the packets being sent by your computer and then forwards the packet to the appropriate destination.5.Adjust the quality of your scanned image before you actually start editing the ima
5、ge in your image editing software.三三Comprehension(阅读理解阅读理解)Passage AA computer virus is a computer program that is created to make and spread copies of itself. The program may however also be designed to have other effects on the systems it infects, ranging from the annoying to the disastrous. Virus
6、 attacks are growing rapidly these days. According to BusinessWeek, the 76,404 attacks reported in the first half of 2003 nearly match previous years total number . As new antivirus tools are more powerful than before, the virus writers are getting a lot smarter with newer and creative ways to attac
7、k network systems. Lets first examine some common virus types: Basic Virus - a piece of software code that is developed to attack computers and network systems via email or Internet connections. It quickly replicates itself and ( )第 3 页 共 7 页gradually attaches to files, programs or the hard drive.Tr
8、ojan Horses - This is a program that doesnt replicate when entering a system but can be effectively used to open back doors. Trojan Horses allow hackers to take control over a particular system or to steal very important data.Worm - this type of virus is able to spread itself automatically over the
9、network from one computer to the next. During a worm attack, users computers get infected without even having to click open email attachment or any program, etc.Since it is very difficult to avoid the virus, your best defense is a powerful antivirus program. In order to fight with such viruses, the
10、software vendors should focus on making their products more robust. This may ask for a trade-off between user-friendliness and security. In specific cases it may require line-by-line inspection, code retooling and even systems automation to defend the installed programs.(一一)、choose the best answer a
11、ccording to the passage A.(根据上文的内容选择根据上文的内容选择正确的答案。正确的答案。1A computer virus is a computer program that is created to make and spread of itself.Aprograms Bvirus C copies Dfiles2Worm spread itself except by .Anetwork BE-mail Cprogram Dhardware3Antivirus program can scan and virus.Aclean Bproduce Crepli
12、cate Dmake4Trojan Horses .Aquickly replicate itself and gradually attache to files, programs or the hard drive.Binfect the computer without even having to click open email attachment or 班级： 学号： 姓名： 第 4 页 共 7 页any program.Callow hackers to take control over a particular system or to steal very import
13、ant data.Davoid the virus to attack computer.5According to BusinessWeek, the attacks reported in the first half of 2003 nearly match previous years total number .A 86,404 B 76,404 C56,354 D34,876Passage B： Circuit Board1. Breadboard (Temporary, no soldering required) This is a way of making a tempor
14、ary circuit, for testing purposes or to try out an idea. No soldering is required and all the components can be re-used afterwards. It is easy to change connections and replace components. Almost all projects started life on a breadboard to check that the circuit worked as intended. 2.Stripboard(Per
15、manent, soldered )Stripboard has parallel strips of copper track on one side. The strips are 0.1“ (2.54mm) apart and there are holes every 0.1“ (2.54mm). Stripboard requires no special preparation other than cutting to size.(3) It can be cut with a junior hacksaw, or simply snap it along the lines of holes by putting it over the edge of a bench or table and pushing hard. 3.Printed Circuit Board (Permanent, soldered )(4)Printed circuit boards (PCB) have copper tracks connecting the holes w
