高二英语Unit7课件.ppt

高二英语Unit7Leavingwithdisease课件包,北京市东城区课件共享工程系列课件展播项目负责人：北京市东城区教研中心陈鸽课件设计制作：北京市第22中学郑颖陈英杰刘佳信,Unit7,Livingwithdiseases,Letsdiscussit!,Whatisthemostseriousproblemstoday?,AIDS,Drugs,Smoking,Drinking,HowmuchdoyouknowaboutAIDS?CheckyourknowledgewiththisAIDSquiz.,Decidewhichofthestatementsaretrueorfalse.1.OnlybadpeoplegetAIDS.2.IcanbecomeinfectedwithHIVbyswimminginapool,holdinghandsorkissingsomeonewithHIV.3.In2002,therewere42millionpeoplelivingwithHIV/AIDSintheworld.4.PeoplewhohavenotinjecteddrugdonotneedtogettestedforHIV.5.IfIhadHIV,IwouldknowbecauseIwouldfeelsick.6.HIV/AIDSisdifficulttocure.7.PeoplewhohaveHIVlookdifferentfromeveryoneelse.8.ItissafetobefriendswithpeoplewhoarelivingwithHIV/AIDS.,F,F,F,F,T,F,T,T,BriefintroductionofAIDS,WhatsHIV?HIVisthevirusthatcausesAIDS.ItsdiscoveredbyaFrenchprofessorLucMontagnier.H-Human:becausethisviruscanonlyinfecthumanbeings.I-Immuno-deficiency:becausetheeffectofthevirusistocreateadeficiency,afailuretoworkproperly,withinthebodysimmunesystem.V-Virus:becausethisorganismisavirus,whichmeansoneofitscharacteristicsisthatitisincapableofreproducingbyitself.Itreproducesbytakingoverthemachineryofthehumancell.,HIV,WhatisAIDS?,AIDSstandsforAcquiredImmuneDeficiencySyndrome.A-Acquired:becauseitsaconditiononemustacquireorgetinfectedwith;notsomethingtransmittedthroughthegenesI-Immune:becauseitaffectsthebodysimmunesystem,thepartofthebodywhichusuallyworkstofightoffgermssuchasbacteriaandvirusesD-Deficiency:becauseitmakestheimmunesystemdeficient(makesitnotworkproperly)S-Syndrome:becausesomeonewithAIDSmayexperienceawiderangeofdifferentdiseasesandopportunisticinfections.,WhatcausesAIDS?,AnHIV-positivepersonreceivesanAIDSdiagnosisafterdevelopingoneoftheCDC-definedAIDSindicatorillnesses.AnHIV-positivepersoncanalsoreceiveanAIDSdiagnosisonthebasisofcertainbloodtests(CD4counts)andmaynothaveexperiencedanyseriousillnesses.ApositiveHIVtestdoesnotmeanthatapersonhasAIDS.AdiagnosisofAIDSismadebyaphysicianaccordingtotheCDCAIDSCaseDefinition.Overtime,infectionwithHIV(HumanImmunodeficiencyVirus)canweakentheimmunesystemtothepointthatthesystemhasdifficultyfightingoffcertaininfections.Thesetypesofinfectionsareknownasopportunisticinfections.Manyoftheinfectionsthatcauseproblemsorthatcanbelife-threateningforpeoplewithAIDSareusuallycontrolledbyahealthyimmunesystem.TheimmunesystemofapersonwithAIDShasweakenedtothepointthatmedicalinterventionmaybenecessarytopreventortreatseriousillness.,HowlongdoesittakeforHIVtocauseAIDS?,Currently,theaveragetimebetweenHIVinfectionandtheappearanceofsignsthatcouldleadtoanAIDSdiagnosisis8-11years.Thistimevariesgreatlyfrompersontopersonandcandependonmanyfactorsincludingapersonshealthstatusandbehaviors.TodaytherearemedicaltreatmentsthatcanslowdowntherateatwhichHIVweakenstheimmunesystem.ThereareothertreatmentsthatcanpreventorcuresomeoftheillnessesassociatedwithAIDS.Aswithotherdiseases,earlydetectionoffersmoreoptionsfortreatmentandpreventativehealthcare.,KenislearningaboutHIV/AIDSinschool.HisteacherhasaskedhimtointerviewadoctoratthelocalhospitalandwriteareportandwriteareportaboutbasicHIV/AIDSfacts.ListentotheinterviewandhelpKenpreparethereport.,Letslistentoit!,Part11.WhatdothelettersAIDSstandfor?Circlethecorrectwordsfromthelist,Letslistentoit!,A=AcquiredAddictedAwfulI=InsaneInfectionImmuneD=DiseaseDeficiencyDisabledS=SyndromeSymbolSickness,2.ListentothetapeandusewhatyouhavelearntaboutHIV/AIDStoanswerthequestionbelow.,Whatdoes“acquired”mean?,Acquiredmeansthatyougetsomethingfromsomeone.In“AIDS”,itmeansthatAIDSisadiseasethatwegetfromotherpeople.,2.Whatisthefunctionofonesimmunesystem?,Theimmunesystemprotectsthebodyfromdisease.,3.WhatdoesAIDSdotoourimmunesystem?,AIDSbreaksdowntheimmunesystem.,Letslistentoit!,Part2Listentothetapeandfillintheblankbelow.1.WhenapersoninfectedwithHIV_AIDS,heorsheeasilygets_.2.ApersonwithAIDShasavery_.3.ManyAIDSpatientsdieof_orserious_,buttherearealsomanydiseasesthatwehavenever_of.4.Therefore,muchofthe_anAIDSpatientreceivesismeanttohelpthebody_againstdiseases.,Letslistentoit!,develops,sick,weakimmunesystem,infections,colds,heard,treatment,defenditself,艾滋病毒(HIV)是一种能够破坏人体免疫系统的病毒，全名为人类免疫力缺乏病毒，英文名为HumanImmunodeficiencyVirus，简称HIV。艾滋病毒是由法国PasteurInstitute的LucMontagnier教授发现的。,HIV是什么？,艾滋病的学名是后天免疫力缺乏症，英文名称AcquiredImmunodeficiencySynd