《大学英语》全新版第三册Unit详解

Unit3SecurityTheLandoftheLockLanguagelearningstrategyTextAAssignmentLead-inActivitiesTeachingObjectivesWarm-upquestionsTeachingObjectivesStudentswillbeableto:•Understandthemainideasofthetworeadings•Appreciatethevarioustechniquesemployedbythewriter•Graspthekeyvocabularyitems•Understandandmastertheusageofimportantstructuralitems.SecuritySecurity:thestateofbeingfreefromdangerorinjury.Howareyoufreefromdangerorinjury?HomeSecurity:thedoors,locks,alarmsystems,lightingthatisinstalledonyourproperty.PersonalSecurity:ensuringdoorslocked,alarmsactivated,windowsclosedandmanyotherroutinetaskswhichacttopreventaburglary.PublicSecurity:thegovernmentmanagingandorganizing.THELANDOFTHELOCKBobGreeneTextALOCKThelockonsomethingsuchasadoororadraweristhedevicewhichisusedtokeepitshutandpreventotherpeoplefromopeningit.Locksareopenedwithakey.Alockisamechanicalorelectronicfasteningdevicethatisreleasedbyaphysicalobject(suchasakey,keycard,fingerprint,RFID（无线射频识别card,securitytoken(安全令牌）etc.),bysupplyingsecretinformation(suchasakeycodeorpassword),orbyacombinationofthese.“LOCKS”Whydoyouuselock?Thelockonsomethingsuchasadoororadraweristhedevicewhichisusedtokeepitshutandpreventotherpeoplefromopeningit.“ONTHELATCH”ThereisasimilaroldsayinginChina路不拾遗，夜不闭户Noonepickedupandpocketedanythinglostontheroad,whilenofamilyhadtheneedtoboltthedoorsatnight.Pleasescanthewholetextin7minsandrecallthekeywordsrelatedtothecontext“lock”isoneofthekeywordsinthistext,bylocating“lock”throughoutthetext,wegetaprettygoodideaofwhatthisessayisabout.Whattypesofsecuritymethodshasmentionedinthetext?Couldyoufindthemout?SecuritySystemsSecuritysecuritychainselectronicalarmsystemstripwiresslidingglassdoorswithsteelbarsaccesscardselectronicX-rayequipmenthigh-intensitylightrapewhistlesdead-boltlocksTextOrganizationPartsPara(s)MainIdeas11~324~15316~19InAmerica,theeraofleavingthefrontdooronthelatchhasdrawntoaclose.Anewatmosphereoffearanddistrustcreepsintoeveryaspectofdailylife.Asaresult,securitydevices,invariedforms,areputtouse.Bylockingourfearsout,webecomeprisonersofourownmaking.Part1TrueorFalse1.Thephrase“onthelatch”meansthedoorisclosedandlocked.()2.Nowadays,doors,notonlyincitiesbutalsoinruralareas,arelocked.()3.Urbanstreetsaremoredangerousthanoutskirtsandcountryareas.()4.InAmericanowadays,nooneleaveshisfrontdooronthelatchanymore.()Keys:F,T,F,TPart2SupportingFactsfortheCentralIdeaInthistexttheauthoruseslotsoffactstosupporthiscentralpointofview:Americaisdeterioratingfrom“theLandoftheFree”into“themostinsecurenation”.Couldyoufindanymoresupportingfacts?Doorsarenotleftunlockedeitherincitiesorinruralareas.(para2)Dead-boltlocks,securitychains,electronicalarmsystemsandtripwiresarewidelyinuse.(para4)Suburbanfamilieshavesteelbarsbuiltinslidingglassdoors.(para4)Smallnoticeswarningagainstburglaryarecommonlyseenpastedonthewindowsofthemostpleasantofhome.(para5)Accesscardsarerequiredofthosewhoworkwithmediumtolarge-sizecompanies.(para10)AirportsecurityuseselectronicX-rayequipmenttoguardagainstterrorism.(para12-13)Businessmenemploynewmachineslinkeduptotheirtelephonetohelpdeterminewhetherthecalleristellingliesornot.(para15)Suburbanhousewiveswearrapewhistlesontheirkeychains.(para18)Wehavebecomesousedto__________________________________________________,andsousedto_______________.SentenceCompletionReadPart2carefullyandsupplythemissinginformation.defendingourselvesagainstthenewatmosphereofAmericanlifeputtingupbarriers2.Wearesatisfied__________________.SentenceCompletionwhenwethinkwearewell-protected3.WithelectronicX-rayequipment,weseemfinallyto__________________.havefiguredoutawaytoholdtheterroristsatbay4.Wedonotwanttoaffordourselves__________________asashadow.evensomuchaluxuryUnderwhatexcusedopeopleresortallthesemeansmentionedinPart2?Doestheauthorthinktheyarejustifiedindoingso?Part3QuestionsandAnswersInthenameof“Security”.No.Becauseintheauthor’sopinion,Americabecomesthemostinsecurenationwithallthesemeans.3.Accordingtotheauthor,whatmaybethelegacywerememberbestwhenwerecallthisera?Webecameprisonersofourselveswhenwedealwiththeunseenhorrorsamongus.QuestionsandAnswersTextAnalysispara1vs.para4Para1:onthelatch;closedbutnotlocked;noneofuscarriedkeys;closeupPara4:dead-boltlocks;securitychains;electronicalarmsystems;tripwireshookeduptoapolicestationorprivateguardfirm;slidingglassdoors;steelbars.Function:Thefirstpairofcontrastactsastheopeningofthewholepieceofwriting.Comparisonandcontrastpara10vs.para11Para10:carrysomekindofaccesscard,suchaselectronicones;securityguardPara11:policyfreeaccessFunction:Itisthesupportingdetailsforthecentralargument.para12vs.para13Para12:it(theairport)isaplaceofeducationandfun;parentsusedtotakechildrenouttodeparturegates（登机口）towatchplanelandandtakeoff.Para13:electronicX-rayequipmenttoholdtheterroristsFunction:Thelattertwoarejusttwosupportingdetailsforthecentralargument.•simplepastinpara1VS.presentperfectinpara4;•aphrasethatindicatedanoldhabitVS.aphraseindicatingthecurrentstate(i.e.“usedto”vs.“nolonger”inPara.11);•summarysentence(“Itwasn’talwayslikethat”inpara12).TextAnalysisTensechange: