第五单元教学内容及过程

1第五单元教学内容及过程TheFirstPeriod:Leading-inClassTeachingProcessMethodandTimeStep1Lead-in:ListeningPractice:(materials:PartIIListening-centeredactivities)Questionsfordiscussion:(1)WhatorganizationreleasedthenewstatisticsonAIDS?(2)WhatpercentageofthepopulationinfectedwithHIVin2004werechildren?(3)Whatdoyouthinkisthegreatesthealthrisktohumanbeings?listening&pairwork(15minutes)Step2BackgroundintroductionAIDSandHIVAIDSstandsforAcquiredImmuneDeficiencySyndrome:·Acquiredmeansyoucangetinfectedwithit;·ImmuneDeficiencymeansaweaknessinthebody'ssystemthatfightsdiseases;·Syndromemeansagroupofhealthproblemsthatmakeupadisease.AIDSisdefinedasoccurringinpeoplewithantibodies(抗体)toaviruscalledHumanImmunodeficiencyVirus(HIV),whichisthoughttohaveoriginatedinAfricanmonkeysandpassedtohumanpopulationsduringthetwentiethcentury.HIVspreadsthroughcontactwithinfectedblood,infectedsexualpartners,orwithinthewombofaninfectedpregnantmother.AIDSusuallydevelopsinfourstages:(1)Inthefirststage,thereisonlyinfectionbyHIVandantibodyproduction;(2)Inthesecondstage,thelymphnodes(淋巴结)enlarge;(3)Inthethirdstage,aninfectedpersonmaybegintohavesuchsignsastiredness,fever,andnightsweats;(4)Inthelaststage,AIDSisdiagnosedwhenapersondevelopscertainuncommon,life-threateningillnesses,forexample,Pneumocystiscariniipneumonia(卡氏肺囊虫肺炎).AIDSisaglobal,humanepidemic.TheWorldHealthOrganizationandUNAIDSestimatedthatbetween2.8and3.5millionpeoplewithAIDSdiedin2004.Anestimated22millionpeoplewithAIDShavediedsince1981.However,thesestatisticsareonlyestimates,asitisnotknownhowmanypeoplehaveactuallydiedofAIDS.Students’presentationanddiscussion(20minutes)Step3Discussion:Questionsfordiscussion(1)whatdoyouknowaboutAIDSanditstransmission?Groupdiscussionandoralreport(15minutes)The2ndand3thPeriods:In-classReadingTeachingProcessMethodandTimeStep1Lead-in:oralreportonAIDSOneofthestudentsisassignedtosearchtheinternetforinformationaboutAIDSandOralreport(15minutes)2makeanoralreporttoclassStep2:Analysisontheimportantlanguagepoints.(Para.1-Para.7)1.（L1）immune：adj.①exempt豁免的，免除的②notaffectedbyagiveninfluence;unresponsive不受影响的，没有反应的③(Immunology)of,relatingto,orhavingimmunitytoinfectionbyaspecificpathogen(免疫学)免疫的【用法】be~to对…有免疫力be~against,/from免受（伤害）的e.g.a)immunefromtaxation免于纳税b)Thecriminalwastoldhewouldbeimmunefrompunishmentifhehelpedthepolice.罪犯被告知说,如果他协助警方,就可以免受惩罚。c)Heisimmunetodiphtheria.他对白喉有免疫力。2.（L1）deficiency:[(复数)deficiencies]n.①alackorshortage,especiallyofsomethingessentialtohealth;aninsufficiency不足，不够②thequalityorconditionofbeingdeficient;incompletenessorinadequacy.缺点，缺陷e.g.anutritionaldeficiency营养缺乏/adeficiencyofprotein蛋白质不足deficienciesinthisplan这项计划的缺陷3.（L1）diagnose:vt.distinguishoridentify(adisease,forexample)bydiagnosis诊断vi.makeadiagnosis作出诊断e.g.a)Theplasticsurgeondiagnosedmyillnessasararebonedisease.整形外科医生诊断出我的病是一种罕见的骨病。Thegeneralpractitionerdiagnosedtheillnessofthebabyaspneumonia.全科医生把小儿的病诊断为肺炎。Thedoctordiagnosedtheillnessasinfluenza.医生诊断此病为流行感冒。Theteacherdiagnosedtheboy'sreadingdifficulties.老师找出那孩子阅读上困难的原因。b)Thedoctorsaidthathecouldnotdiagnoseatthattime.这位医生说当时他无法做出判断。4.(L3)infectvt.①putdiseaseintothebodyof传染②affectinacontagiousway感染；影响e.g.a)Itisreportedthatmonkeypoxmayhaveinfectedatleast37people,thoughitisnotasinfectiousorfatalasSARSvirus.据报道，虽然猴痘没有非典病毒传染性强、致命，但它已感染至少37人。Thediseaseinfectedhisears,andhebecamedeaf.这种病使他耳朵受感染，并使他失聪。b)Hisfearinfectedme,andIfollowedasfastasIcould.他的恐惧感染了我，于是我尽快地赶上去。Sheinfectedthewholeclasswithherlaughter.她的笑声感染了全班同学。Explanation;exemplification;presentation(50minutes)3Step3ThecomprehensionoftextAnsweringthefollowingquestionsaccordingtothetextofsectionA:(1)HowmanyAmericanpeoplehavebeenkilledbyAIDSinthepastfewyears?(2)Accordingtothepassage,whatisthefastestgrowinggroupinfectedwithAIDS?(3)Whatarethereasonswhysomelocalorganizationemerged?(4)WhatisthepurposeofformingtheSouthCarolinaAIDSEducationNetwork?GroupDiscussion(15minutes)Step4Discussion(1)Story-telling:talkabouttheactiontakenbysomelocalorganization。(2)WhatcanwedoforthepatientsinfectedwithAIDS？Story-tellinganddiscussion(20minutes)The4thand5thPeriods:In-classReadingTeachingProcessMethodandTimeStep1Warm-upactivities:numberinmylifeEachstudentthinksofanumberwhichisimportantinhis/herlife-adate,atelephoneorhousenumber,anage,orwhatever.Avolunteerwriteshis/hernumberontheboard,andtheotherstrytoguesswhatitisandwhyitisimportantActivities(10minutes)Step2:Analysisontheimportantlanguagepoints.(para.8-para.14)1.(L5）constitute:vt.makeup;form构成；组成constitution:n.宪法,构造,章程,惯例e.g.Twosemestersandtwovacationsconstituteanacademicyear.一学年有两个学期和两个假期。Fourcollegestudentsconstituteayoungvolunteers’grouptohelptutorchildrenoflaid-offworkers.四名大学生组成一个青年自愿者小组，帮助辅导下岗职工子女。【词义辨析】compose,consistof,comprise,constitute这组动词的一般含义为“组成”或“构成”。compose在表示“由……材料构成”时，见于被动语态；在用于主动语态时，一般它所表示的“构成”或“组成”总包含着融合为一，而且主语或者是复数名词或者是集体名词。consistof的含义与被动语态的compose相同。comprise在表示“构成”时，其内涵是“包括”或“覆盖”。constitute的主语可以是复数名词也可以是单数名词，所“构成”的事物在属性和特征上，亦或在组织上，与组成成分是一致的。e.g.a)Concreteiscomposedofcement,sandandgravelmixedwithwater.混凝土由水泥、砂、石子与水掺和而构成。England,ScotlandandWalescompos