古典加密主要是对加密算法的保密,现代加密算法是公开的,主要是针对秘钥进行保密。
1、正确正确
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Inthelast12yearstotalemploymentintheUnitedStatesgrewfasterthanatanytimeinthepeacetimehistoryofanycountry–from82to110millionbetween1973and1985–thatis,byafullonethird.Theentiregrowth,however,wasinmanufacturing,andespeciallyinno–blue-collarjobs…
Thistrendisthesameinalldevelopedcountries,andis,indeed,evenmorepronouncedinJapan.Itisthereforehighlyprobablethatin25yearsdevelopedcountriessuchastheUnitedStatesandJapanwillemploynolargeraproportionofthelaborforceInmanufacturingthandevelopedcountriesnowemployinfarming–atmost,10percent.TodaytheUnitedStatesemploysaround18millionpeopleinblue-collarjobsinmanufacturingindustries.By2010,thenumberislikelytobenomorethan12million.Insomemajorindustriesthedropwillbeevensharper.Itisquiteunrealistic,forinstance,toexpectthattheAmericanautomobileindustrywillemploymorethanone–thirdofitspresentblue-collarforce25yearshence,eventhoughproductionmightbe50percenthigher.
Ifacompany,anindustryoracountrydoesnotinthenextquartercenturysharplyincreasemanufacturingproductionandatthesametimesharplyreducetheblue-collarworkforce,itcannothopetoremaincompetitive–oreventoremain“developed.”Theattempttopreservesuchblue–collarjobsisactuallyaprescriptionforunemployment…
ThisisnotaconclusionthatAmericanpoliticians,laborleadersorindeedthegeneralpubliccaneasilyunderstandoraccept.WhatconfusestheissueevenmoreitthattheUnitedStatesisexperiencingseveralseparateanddifferentshiftsinthemanufacturingeconomy.Oneistheaccelerationofthesubstitutionofknowledgeandcapitalformanuallabor.Wherewespokeofmechanizationafewdecadesago,wenowspeakof“robotization“or“automation.”Thisisactuallymoreachangeinterminologythanachangeinreality.WhenHenryFordintroducedtheassemblylinein1909,hecutthenumberofman–hoursrequiredtoproduceamotorcarbysome80percentintwoorthreeyears–farmorethananyoneexpectstoresultfromeventhemostcompleterobotization.Butthereisnodoubtthatwearefacinganew,sharpaccelerationinthereplacementofmanualworkersbymachines–thatis,bytheproductsofknowledge.
1.Accordingtotheauthor,theshrinkageinthemanufacturinglaborforcedemonstrates______.
A.thedegreetowhichacountry’sproductionisrobotized
B.areductioninacountry’smanufacturingindustries
C.aworseningrelationshipbetweenlaborandmanagement
D.thedifferencebetweenadevelopedcountryandadevelopingcountry
2.Accordingtotheauthor,incoming25years,adevelopedcountryorindustry,inordertremaincompetitive,oughtto______.
A.reducethepercentageoftheblue-collarworkforce
B.preserveblue–collarjobsforinternationalcompetition
C.acceleratemotor–canmanufacturinginHenryFord’sstyle
D.solvetheproblemofunemployment
3.Americanpoliticiansandlaborleaderstendtodislike_____.
A.confusioninmanufacturingeconomy
B.anincreaseinblue–collarworkforce
C.internalcompetitioninmanufacturingproduction
D.adropintheblue–collarjobopportunities
4.Theword“prescription”in“aprescriptionforunemployment”maybetheequivalentto______
A.somethingrecommendedasmedicaltreatment
B.awaysuggestedtoovercomesomedifficulty
C.somemeasurestakeninadvance
D.adevicetodire
5.Thispassagemayhavebeenexceptedfrom________
A.amagazineaboutcapitalinvestment
B.anarticleonautomation
C.amotor-carmagazine
D.anarticleonglobaleconomy
翻译:
Asthesourceofaluminumisalmostinexhaustible,wecanexpectthatmoreandmoreuseswillbefoundforthisversatilemetal.(PassageTwo)
RogerRosenblatt’sbookBlackFiction,inattemptingtoapplyliteraryratherthansociopoliticalcriteriatoitssubject,successfullyalterstheapproachtakenbymostpreviousstudies.AsRosenblattnotes,criticismofBlackwritinghasoftenservedasapretextforexpoundingonBlackhistory.AddisonGayle’srecentwork,forexample,judgesthevalueofBlackfictionbyovertlypoliticalstandards,ratingeachworkaccordingtothenotionsofBlackidentitywhichitpropounds.Althoughfictionassuredlyspringsfrompoliticalcircumstances,itsauthorsreacttothosecircumstancesinwaysotherthanideological,andtalkingaboutnovelsandstoriesprimarilyasinstrumentsofideologycircumventsmuchofthefictionalenterprise.Rosenblatt’sliteraryanalysisdisclosesaffinitiesandconnectionsamongworksofBlackfictionwhichsolelypoliticalstudieshaveoverlookedorignored.WritingacceptablecriticismofBlackfiction,however,presupposesgivingsatisfactoryanswerstoanumberofquestions.Firstofall,isthereasufficientreason,otherthanthefacialidentityoftheauthors,togrouptogetherworksbyBlackauthorsSecond,howdoesBlackfictionmakeitselfdistinctfromothermodernfictionwithwhichitislargelycontemporaneousRosenblattshowsthatBlackfictionconstitutesadistinctbodyofwritingthathasanidentifiable,coherentliterarytradition.LookingatnovelswrittenbyBlackoverthelasteightyyears,hediscoversrecurringconcernsanddesignsindependentofchronology.Thesestructuresarethematic,andtheyspring,notsurprisingly,fromthecentralfactthattheBlackcharactersinthesenovelsexistinapredominantlywhiteculture,whethertheytrytoconformtothatcultureorrebelagainstit.BlackFictiondoesleavesomeaestheticquestionsopen.Rosenblatt’sthematicanalysispermitsconsiderableobjectivity;heevenexplicitlystatesthatitisnothisintentiontojudgethemeritofthevariousworksDyethisreluctanceseemsmisplaced,especiallysinceanattempttoappraisemighthaveledtointerestingresults.Forinstance,someofthenovelsappeartobestructurallydiffuse.Isthisadefect,oraretheauthorsworkingoutof,ortryingtoforge,adifferentkindofaestheticInaddition,thestyleofsomeBlacknovels,likeJeanToomey’sCane,vergesonexpressionismorsurrealism;doesthistechniqueprovideacounterpointtotheprevalentthemethatportraysthefateagainstwhichBlackheroesarepitted,athemeusuallyconveyedbymorenaturalisticmodesofexpressionInspiteofsuchomissions,whatRosenblattdoesincludeinhisdiscussionmakesforanastuteandworthwhilestudy.BlackFictionsurveysawidevarietyofnovels,bringingtoourattentionintheprocesssomefascinatingandlittle-knownworkslikeJamesWeldonJohnson’sAutobiographyofanEx-ColoredMan.Itsargumentistightlyconstructed,anditsforthright,lucidstyleexemplifieslevelheadedandpenetratingcriticism.
1.Theauthorofthetextisprimarilyconcernedwith__________.
[A]Evaluatingthesoundnessofaworkofcriticism.[B]Comparingvariouscriticalapproachestoasubject.
[C]Discussingthelimitationsofaparticularkindofcriticism.
[D]Summarizingthemajorpointsmadeinaworkofcriticism.
2.TheauthorofthetextbelievesthatBlackFictionwouldhavebeenimprovedhadRosenblatt__________.
[A]EvaluatedmorecarefullytheideologicalandhistoricalaspectsofBlackfiction.
[B]AttemptedtobemoreobjectiveinhisapproachtonovelsandstoriesbyBlackauthors.
[C]ExploreingreaterdetailtherecurrentthematicconcernsofBlackfictionthroughoutitshistory.
[D]Assessedtherelativeliterarymeritofthenovelsheanalyzesthematically.
3.author’sdiscussionofBlackFictioncanbebestdescribedas__________.
[A]Pedanticandcontentious.
[B]Criticalbutadmiring.
[C]Ironicanddeprecating.
[D]Argumentativebutunfocused.authorofthetextemploysallofthefollowinginthediscussionofRosenblatt’s
4.bookEXCEPT:__________.
[A]Rhetoricalquestions.
[B]Specificexamples.
[C]Comparisonandcontrast.
[D]Definitionofterms.
5.TheauthorofthetextreferstoJamesWeldonJohnson’sAutobiographyofanEx-ColoredManmostprobablyinorderto__________.
[A]pointoutaffinitiesbetweenRosenblatt’smethodofthematicanalysisandearliercriticism.
[B]Clarifythepointaboutexpressionisticstylemadeearlierinthepassage.
[C]QualifytheassessmentofRosenblatt’sbookmadeinthefirstparagraphofthepassage.
[D]giveaspecificexampleofoneoftheaccomplishmentsofRosenblatt’swork.
_____atinthisway,thepresenteconomicsituationdoesn'tseemsogloomy.
Ifnot_____withtherespecthefeelsduetohim,Jackgetsveryill-temperedandgrumblesallthetime.