全国职称英语等级考试全真题理工类lWord文档格式.docx

全国职称英语等级考试全真题理工类lWord文档格式.docx

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CATVworkedwell,andsoonnewuseswerefoundforit.Localstationscouldfeedprogramsintoemptychannelsthatwerenotinuse.Peoplealongthecablecouldhavelocalnews,weatherreports,andfarmandschoolnewsatnoextracharge.

Today,cabletelevisionhasmovedintocities.Itbringsinextraprogramsthatcityviewerswithregularantennascannotsee.Itisalsousedinmanyclassroomsthroughoutthecountry.

1.Fromthefirstparagraphweknowthat________.

A.mostpeopleusecabletelevision

B."

communityantenna"

isanothernamefor"

regularantenna"

C.acommunityantennaisusedforcabletelevision

D.regularantennascannotpickupTVsignalsprograms

2.Ofthefollowing,whichisNOTthewayTVsignalstravel?

A.Inacurve.

B.Inastraightline.

C.Inalldirection.

D.Towardthehorizon.

3.CableTVisbecomingmoreandpopularbecause_____________.

A.itisfreeofcharge

B.itcanprovidemoreprograms

C.itprovidesallTVusersgoodpictures

D.TVsetswithregularantennascanalsohaveagoodreceptionthroughCATV

4.Onthewhole,thispassageisabout________.

A.howtoputuphighantennas

B.awayofpickingupbetterTVprograms

C.howtousetheemptychannelsonyourTVset

D.thewaythatTVsignalsaresent

5.Fromthepassagewecaninferthat__________.

A.TVhasbeguntobeusedforeducationalpurposes

B.thereisnochargeforCATV

C.cableTVcannotbeusedinmountainousareas

D.antennasforcableTVareusuallyputupinthecenterofacommunity

Passage2

Inearliesttimes,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.mystery

7.Peopleoncethoughthatlightningcamefrom__________.

A.scientists

B.ground

C.lightningrod

D.gods

8.Oneflashoflightningcanproduceenoughelectricityfor______bulbs.

A.10,000

B.1,000

C.1,000,000

D.100

9.BenjaminFranklin___________.

A.madethefirstlightningrod

B.inventedelectricity

C.builttheEmpireStateBuilding

D.preventedLightningfromhittingcars

10._________isthebestplacetobeduringanelectricalstorm.

A.Swimmingpool

B.ahighground

C.Underatree

D.Acar

Passage3

Becauseoftheenergycrisis,scientistsintheoil-consumingnationshavebecomeincreasinglyinterestedinthepotential（潜在的）ofsolarenergy.Someexpertsestimatethatthepresentsupplyoffossil（化石）fuelwillnotlastuntiltheendofthetwentiethcentury.Theproblemthatsolarenergyresearchersfaceishowtoharness（利用）thesun'

senergyeffectivelyandinexpensively.Oneofthemostpopularmethodscurrentlybeingtestedusesrooftopsolarcollectorsandundergroundstoragetanks.Anadvantageofaproperlyworkingsystemofthistypeisthatitwillnotcreateanyenvironmentalpollution.Anotheradvantageofusingsolarenergyisthatthecostofthefuel-thesun'

srays-iszero.Whenasolarheatingsystemisworkingatmaximum（最大的）efficiency,itcanprovideupto80percentofwinterheatingneeds.

11.Themaintopicofthispassageis__________.

A.theshortageoffossilfuel

B.theproblemsthatenergyresearchersface

C.anenvironmentalpollutionproblem

D.aninexpensiveenergysource

12.Onepopularsolarheatingsystemmakesuseof__________.

A.roofcollectorsandundergroundstorage

B.fossilfuelconversion

C.undergroundoiltanks

D.watercollectionandevaporation

13.Thecostofusingthesun'

sraysforheatingis___________.

A.aboutthesameasthecostoffossilfuels

B.severalhundreddollarsperyear

C.negligiblecomparedwithotherenergysources

D.determinedbytheseverityofthewinter

14.Whichofthefollowingdescribesanadvantageofusingsolarenergy?

A.Thereislittleornoenvironmentalpollution.

B.Alargepercentageoffuelcostscanbesaved.

C.Fossilfuelswillbecomemoreplentiful.

D.Theoil-consumingnationswillnothavetoimportoil.

15.Accordingtosomeexperts,thesupplyoffossilfuelwillnotlast_______.

A.onemorecentury

B.anindeterminabletime

C.untiltheendofthiscentury

D.indefinitely

第二部分完成句子（25分）

根据短文内容完成句子，每个空格只能填一个单词。

有的单词第一个字母已经给出，请将其余字母补全。

Notlongago,anairplanewasflyingoverNewZealand.Therewasatelevisioncameracrewonboard.Suddenly,outinthenightsky,abrightsphere（球体）cameintoview.Everyoneonboardsawitandeveryonethough,"

UFO"

-UnidentifiedFlyingObject.Thecameracrewwentintoactionandstartedfilming.Thatweekpeopleallovertheworldsawthefilmofthismysteriouslightontheirtelevisionscreens.Whatwasit?

Wasitaspaceshipfullofvisitorsfromanotherplanet?

Thecaptainoftheaeroplaneandthefilmcrewbelieveditwas.Otherobservershadmanydifferentexplanations.SomesaiditwasVenus（金星）.Otherssaiditwasjustatrickoflight.

Anairtrafficcontrolleralsosawitonhisradarscreen.Hethoughtthataflockofbirdswascausingdotsonhisradarscreenwhenthe"

appeared.

MostastronomersnowbelievethatwhatthesepeoplesawwasalmostcertainlytheplanetVenus.Atthattimeofyearitisverybrightandeasytosee.Andfromamovingaeroplaneitcanappeartobemovingfast.SofarthereisnoproofthatUFOsorspaceshipsfromotherplanetsdoexist.TheseyearsinvestigatorsofUFOshaveinvestigatedthousandsofsighting-oroccasionswhenpeoplesaidtheysawaUFO.Ninetypercentoftheseturnedouttohaveasimpleexplanation.

However,it'

sgoodideatokeepanopenmind.ScientistsinsomecountriesaretryingtopersuadetheirgovernmentstohelpthemstudyUFOs.Andtheyareplanningtocooperateinter-nationallyonreportingandinvestigatingsightingsofUFOs.

Afterall,itisquitepossiblethatthereislifeoutthereintheuniverse.Andifsomethingisalive,itisquitepossiblethatitwillcometovisitus.

16.ThecaptainandthecameracrewbelievedthatUFOwasavspaceshipfromanotherplanet.

17.ManyobelievedthattheUFOwasVenus.

18.SofarthereisnoproofthatUFOsarespfromouterspace.

19.SomescientistsintheworldareplanningtodosomeronUFOs.

20.Plifeintheuniversemaytrytomakeavisittous.

第三部分阅读理解（80分）

Inrecentyears,scientificandtechnologicaldevelopmentshavedrasticallychangedhumanlifeonourplanet,aswellasourviewsbothofourselvesasindividualsinsocietyandoftheuniverseasawhole.MaybeoneofthemostprofounddevelopmentsofthelastdecadeisthediscoveryofrecombinantDNAtechnology,whichallowsscientiststointroducegenetic（遗传学的）material（orgenes）fromoneorganismintoanother.Initssimplestform,thetechnologyrequirestheisolationofapieceofDNA,eitherdirectlyfromtheDNAoftheorganismunderstudy,orartificiallysynthesizedfromanDNA.ThispieceofDNAisthenligated（结扎）toafragmentofbacterialDNAwhichhasthecapacitytoreplicate（复制）itselfindependently.Therecombinantmoleculethusproducedcanbeintroducedintothecommonintestinal（内部的）bacteriumEscherishchiacoli,whichcanbegrowninverylargeamountsinsyntheticmedia.Underproperconditions,theforeigngenewillnotonlyreplicateinthebacteria,butalsoexpressitself,throughtheprocessoftranscriptionandtranslation,togiverisetolargeamountsofthespecificproteincodedbytheforeigngene.

Thetechnologyhasalreadybeensuccessful