全国职称英语等级考试试题(理工类)---爱问知识人VIP免费

全国职称英语等级考试试题（理工类）第一部分阅读理解(75分)Passage1CATVisashortwayofsaying"communityantenna(天线)television."But"cabletelevision"isthetermmostpeopleuse.CabletelevisionallowsviewerstoreceiveTVprogramsthattheycannotpickupwiththeirregularantennas.Televisionsignalsdonotfollowthecurve(曲线)oftheearth.Theytravelinstraightlinesinalldirections.SignalsfromaTVstationmovetowardthehorizon(水平线)andthengointospace.Ifyouliveonlyafewmilesfromastation,youmaynotgetanypictureatall.CATVbeganin1948.PeopleinplacesfarfromTVstationssharedthecostofputtinguphighantennas.Acommunityantennawasusuallyplacedonahill,amountain,oronahightower.TheantennapickedupTVsignalsandfedthemintoasmalllocalstation.Fromthestation,thickwirescalledcablesranouttonearbyhomes.Eachpersonusingthecablepaidamonthlycharge.CATVworkedwell,andsoonnewuseswerefoundforit.Localstationscouldfeedprogramsintoemptychannelsthatwerenotinuse.Peoplealongthecablecouldhavelocalnews,weatherreports,andfarmandschoolnewsatnoextracharge.Today,cabletelevisionhasmovedintocities.Itbringsinextraprogramsthatcityviewerswithregularantennascannotsee.Itisalsousedinmanyclassroomsthroughoutthecountry.1.Fromthefirstparagraphweknowthat________.○A.mostpeopleusecabletelevision○B."communityantenna"isanothernamefor"regularantenna"○C.acommunityantennaisusedforcabletelevision○D.regularantennascannotpickupTVsignalsprograms2.Ofthefollowing,whichisNOTthewayTVsignalstravel?○A.Inacurve.○B.Inastraightline.○C.Inalldirection.○D.Towardthehorizon.3.CableTVisbecomingmoreandpopularbecause_____________.○A.itisfreeofcharge○B.itcanprovidemoreprograms○C.itprovidesallTVusersgoodpictures○D.TVsetswithregularantennascanalsohaveagoodreceptionthroughCATV4.Onthewhole,thispassageisabout________.○A.howtoputuphighantennas○B.awayofpickingupbetterTVprograms○C.howtousetheemptychannelsonyourTVset○D.thewaythatTVsignalsaresent5.Fromthepassagewecaninferthat__________.○A.TVhasbeguntobeusedforeducationalpurposes○B.thereisnochargeforCATV○C.cableTVcannotbeusedinmountainousareas○D.antennasforcableTVareusuallyputupinthecenterofacommunityPassage2Inearliesttimes,menconsideredlightningtobeoneofthegreatmysteriesofnature.Someancientpeoplebelievedthatlightningandthunderweretheweaponsofthegods.Inreality,lightningisaflowofelectricityformedhighabovetheearth.Asingleflashoflightning1.6kilometerslonghasenoughelectricitytolightonemillionlightbulbs.TheAmericanscientistandstatesman,BenjaminFranklin,wasthefirsttoshowtheconnectionbetweenelectricityandlightningin1752.Inthesameyearhealsobuiltthefirstlightningrod.Thisdeviceprotectsbuildingsfromdamagebylightning.Modernsciencehasdiscoveredthatonestrokeoflightingcontainsmorethan15millionvolts.Asparkbetweenacloudandtheearthmaybeaslongas13kilometers,andtravelataspeedof30millionmeterspersecond.Scientistsestimatethatthereareabout2000millionflashesoflightningperyear.LightninghitstheEmpireStateBuildinginNewYorkCity30to48timesayear.IntheUnitedStatesalongitkillsanaverageofonepersoneveryday.Thesafestplacetobeincaseofanelectricalstormisinaclosedcar.Outside,oneshouldgotolowgroundandnotgetundertrees.Also,oneshouldstayoutofwaterandawayfrommetalfences.Insideahouse,peopleshouldavoidopendoorwaysandwindowsandnottouchwiresormetalthings.Withlightning,itisbettertobesafethansorry!6.Lightningisreally__________.○A.weapon○B.electricity○C.light○D.mystery7.Peopleon...