2015南京航空航天大學(xué)246英語真題

1、科目代碼：246科目名稱：英語第1頁共7頁南京航空航天大學(xué)南京航空航天大學(xué)2015年碩士研究生入學(xué)考試初試試題（A卷）2015年碩士研究生入學(xué)考試初試試題（A卷）科目代碼:246科目名稱:英語滿分:100分注意:①認(rèn)真閱讀答題紙上的注意事項；②所有答案必須寫在答題紙上，寫在本試題紙或草稿紙上均無①認(rèn)真閱讀答題紙上的注意事項；②所有答案必須寫在答題紙上，寫在本試題紙或草稿紙上均無效；③本試題紙須隨答題紙一起裝入試題袋中交回！效；③本試題紙

2、須隨答題紙一起裝入試題袋中交回！I.VocabularyStructure(20points)Directions:Thereare20incompletesentencesinthispart.FeachsentencetherearefourchoicesmarkedA.B.C.D.ChoosetheONEanswerthatbestcompletesthesentence.ThenwritedownyouranswerontheA

3、nswerSheet.1.Whydidn’tyoubuyit”“I_______butIdidn’thavethemoney.”A.wouldB.wouldhaveC.hadhadD.hadbought2.Theboarddeemediturgentthatthesefiles______rightaway.A.hadtobeprintedB.shouldhavebeenprintedC.mustbeprintedD.shouldbep

4、rinted3.Ihaveheardbothcolleaguesboss______wellofhim.A.tospeakB.spokenC.tohavespokenD.speak4.Jeanwkedjustsomuch________.A.likewhatshewastoldtoB.asshewastoldtoC.astowhatshetriedtodoD.likeshewastoldto5.Thisunion______the199

5、0’sprovidesfinancialassistancetosupptlaidoffwkers.A.whenitwasfoundedB.wasfoundedC.whichwasfoundedinD.wasfoundedin6.Humanbehaviismostlyaproductoflearning______thebehaviofanimaldependsmainlyoninstinct.A.soB.unlessC.however

6、D.whereas7.He______themeetingbutuponlearningthattheywoulddiscusssomethingirrelevanttohisfieldofstudyhepedtheidea.A.weregoingtoattendB.hadattendedC.weretoattendD.wouldhaveattended8.Thecomputeristheonlyone_____toissueticke

7、tsontheplane.A.toallowB.allowedC.allowingD.tohaveallowed9.Soconfused____thathedidn’tknowhowtostarthislecture.A.sincehebecameB.thathebecameC.wouldhebecomeD.didhebecome10.Nuclearscienceshouldbedevelopedtobenefitpeople_____

8、_harmthem.A.methanB.ratherthanC.otherthanD.betterthan11.Johnsaidthathewasgoingto_____hiswifehomenextyear.A.adviseB.accompanyC.departD.discard12.Prices_______becauseofthechangeineconomicpolicy.A.flewB.skippedC.ranD.soared

9、13.Iffullcreditweregiventothispartitcould_______ahighgradefthestudentinhisphysicalcourse.A.belongtoB.beduetoC.subjecttoD.contributeto14.Theteacherwroteabriefcommentinthe______toshowthestudentwhyitiswrong.A.markB.marginC.

10、mailD.manual科目代碼：246科目名稱：英語第3頁共7頁36.A.lookedB.wokenC.dreamedD.locked37.A.withB.butC.byD.having38.A.downB.offC.onD.up39.A.militaryB.warC.constantD.social40.A.butB.uptoC.thatD.justIII.ReadingComprehension(30points)Directio

11、ns:Thereare4passagesinthispart.Eachpassageisfollowedbysomequestionsunfinishedstatements.FeachofthemtherearefourchoicesmarkedA.B.C.D.YoushoulddecideonthebestchoicewritedownyouranswerontheAnswerSheet.Passage1Avarietyofsimp

12、letechniquescanpreventcomputercrimebutmesophisticatedmethodsarealsonecessarytopreventcomputercrimes.Onetechniquetoprotectconfidentialityisencryption(加密).Infmationcanbescrambledunscrambledusingmathematicalequationsasecret

13、codecalledakey.Twokeysareusuallyemployedonetoencodetheothertodecodetheinfmation.Thekeythatencodesthedatacalledtheprivatekeyispossessedbyonlythesender.Thekeythatdecodesthedatacalledthepublickeymaybepossessedbyseveralrecei

14、vers.Thekeysaremodifiedperiodicallyfurtherhamperingunauthizedaccessmakingtheencryptedinfmationdifficulttodecodefge.Anothertechniquetopreventcomputercrimeistolimitaccessofcomputerdatafilestoapprovedusers.Accesscontrolsoft

15、wareverifiescomputeruserslimitstheirprivilegestoviewalterfiles.Recdscanbemadeofthefilesaccessedtherebymakingusersaccountableftheiractions.Militaryganizationsgiveaccessrightstoclassifiedconfidentialsecrettopsecretinfmatio

16、naccdingtothecrespondingsecurityclearanceleveloftheuser.Passwdsareconfidentialsequencesofactersthatgiveapprovedusersaccesstocomputers.Tobeeffectivepasswdsmustbedifficulttoguess.Effectivepasswdscontainamixtureofacterssymb

17、olsthatarenotrealwds.Tokensaretamperresistantplasticcardswithmicroprocesschipsthatcontainastedpasswdthatautomaticallyfrequentlychanges.Whenacomputerisaccessedusingatokenthecomputerreadsthetoken’spasswdaswellasanotherpass

18、wdenteredbytheusermatchesthesetwotoanidenticaltokenpasswdgeneratedbythecomputertheuser’spasswdwhichisstedonaconfidentiallist.Inthefuturepasswdstokensmaybereinfcedbybiometrics(生物測定學(xué))identificationmethodsthatuseuniqueperso

19、nalacteristicssuchasfingerprintsskinoilsvoicevariationskeyboardtypingrhythms.Computerwksmultiplecomputerslinkedtogetherareparticularlyvulnerabletocomputercrimes.Infmationonwkscanbeprotectedbyafirewallacomputerplacedbetwe

20、enthewkedcomputersthewk.Thefirewallpreventsunauthizedusersfromgainingaccesstothecomputersonawkitensuresthatinfmationreceivedfromanoutsidesourcedoesnotcontaincomputervirusesselfreplicatingcomputerprogramsthatinterferewith