专业英语复习卷1及答案

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1、《专业英语》复习卷1使用班级：电信糸一.Vocabulary（词汇）（一）PutthefollowingwordsandphrasesintoChinese.（写出下列词组的汉语）1・semiconductordevices2.eletricfield3.polarityswitch4.layoutdesign5.reversebiased6.combinationallogic7.machine-languagecode&cableTVprograms9.fiberoptic1（）・spectrumefficiency（二）Putthefollowingwordsandphrasesi

2、ntoEnglish.（写出下列词组的英语）.U1.调频熬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.帧屮继10.国际漫游能力二.Translation（翻译）1・Resistorsareusedtolimitcurrentflowingtoadevice,therebypreventingitfromburningout,asvoltagedividerstoreducevoltageforothercircuits,astransistorbiasingcircuits,andtoserveascircuitloads.2.

3、Amultimeterisageneral-purposemetercapableofmeasuringdeandacvoltage,current,resistance,andinsomecases,decibels.3・Thetransformer'sjobistoreducethe7200voltsdownto240voltsthatmakeupnormalhouseholdelectricalservice.4.Therouterbasicallyreadsthedestinationaddressonthepacketsbeingsentbyyourcomputerandthe

4、nforwardsthepackettotheappropriatedestination.5・Adjustthequalityofyourscannedimagebeforeyouactuallystarteditingtheimageinyourimageeditingsoftware.三.Comprehension（阅读理解）PassageAAcomputervirusisacomputerprogramthatiscreatedtomakeandspreadcopiesofitself.Theprogrammayhoweveralsobedesignedtohaveotheref

5、fectsonthesystemsitinfects,rangingfromtheannoyingtothedisastrous.Virusattacksaregrowingrapidlythesedays・AccordingtoBusinessWeek,the76,404attacksreportedinthefirsthalfof2003nearlymatchpreviousyear'stotalnumber.Asnewantivirustoolsaremorepowerfulthanbefore,theviruswritersaregettingalotsmarterwithnew

6、erandcreativewaystoattacknetworksystems.Let'sfirstexaminesomecommonvirustypes:BasicVirus-apieceofsoftwarecodethatisdevelopedtoattackcomputersandnetworksystemsviaemailorInternetconnections.Itquicklyreplicatesitselfandgraduallyattachestofiles,programsortheharddrive.TrojanHorses-Thisisaprogramthatdo

7、esn'treplicatewhenenteringasystembutcanbeeffectivelyusedtoopen'backdoors.1TrojanHorsesallowhackerstotakecontroloveraparticularsystemortostealveryimportantdata.Worm・thistypeofvirusisabletospreaditselfautomaticallyoverth