高中英语Unit 21 Lesson 3 Epidemics Explained 2课件北师大版选修

Unit21HumanBiologyLesson3EpidemicsExplainedLookattheKeyWords.Whichofthesediseasescanbeepidemic?AIDSCancerHeadacheFluHeartdiseaseStomachacheTBEpidemics:Workinpairs.Doyouthinkthesestatementsaretrue(T)orfalse(F)?1.TBandflukillmillionsofpeopleeveryyear.2.Mostofdiseasesareverynew.3.Epidemicshaveaffectedhistoricalevents.4.Ittakesyearsforadiseasetospreadworldwide.5.Epidemicscanwipeoutuptohalfofthepopulationinhighlypopulatedareas.6.Morepeoplediedofafluepidemicin1918/1919thandiedinWorldWarI.Sequencingofinformation:1.readthetextwithgapstogetthegeneralideaandseehowitdevelops.2.Readthesentencesbeforeandafterthegapstogiveyouanideaofwhatthebeginningorendofthemissingparagraphmightreferto.3.Readthemissingparagrapphsandlookforthesereferences.4.Ifaparagraphdoesn’tseemtofit,youmayhavemadeamistake,socarefullyrereadeachparagraph.Nowusethestrategiestomatchthefiveparagraphs(A-E)withgaps2,4,7,9and11inthetext.Theanswers:ParagraphAParagraphBParagraphCParagraphDParagraphEGap2Gap4Gap7Gap9Gap11CompletethesesentencesaboutthetextinyourownwordsHowdidyoufeelafterreadingthearticle?TelltheclassVoiceyouropinion:Languagepoints1.epidemicsexplained解释传染病epidemicsn.流行[传染]病,时疫.(风尚等的)流行;(流行病的)蔓延adj.传染[流行性]的choleraepidemic霍乱流行massepidemic大流行;集体流行Eg.Violenceisreachingepidemiclevels.暴力达到了流行的程度。2.epidemicsthroughouthistory历史上的传染病病例throughoutprep.遍及,贯穿adv.到处,始终,全部Eg.Theroadiskeptopenthroughouttheyear.这条路全年开通.3.withnewhealththreatsontherise.对人类健康造成威胁的因素在不断增加。risen.上升,增加,上涨,高地,小山,发生,出现vi.升起,起身,发源,起义,高耸,增长,上升,复活vt.使飞起4.lookatv.看,考虑,着眼于;回顾5.Bacteriaandviruseshavebeenaroundsincethebeginningoflifeonearth自从地球上有了生命,便有了各种细菌和病毒.6.aslongas只要,在...的时候;既然;以…为条件Eg.Youmayborrowthisbookaslongasyoupromisetogiveitback.只要你答应归还，你就可以把这书借走。Aslongasyou'veoffered,Iaccept.既然你已给我，我就接受.IwillcooperateaslongasIamnotifiedontime.只要及时告诉我，我就会合作.7.asearlyas430BC早在公元前430年asearlyas早在8.onrecordadv.记录在案,公开宣布的;记录下来的Eg.thecoldestwinteronrecord有记录以来最冷的冬天9.attempttodosth.attemptn.努力,尝试,企图vt.尝试,企图Eg.Theboysattemptedtoleaveforcampingbutwerestoppedbytheirparents.男孩子们想去野营但被他们的父母们拦住了。Shemadeanattempttocookthedinner.她试着做这顿饭。10.sweepthroughsweepv.扫,打扫,清扫,席卷,冲光,扫过,掠过Eg.Thewindsweptovertheplain.疾风横扫平原11.diefromthedisease(病以外)因某事而死Eg.Everywintersomeoldpeoplediefromhypothermia.每年冬天都有些老人死于体温过低。12.beknownasv.被认为是;以...知名;被认为是;称为beknownfor因...而著名beknownto为...所知13.alackof（常与of连用）缺乏；需要alackofmoney缺乏金钱Thereisnolackofvegetable.蔬菜不缺。14.providetheperfectconditionsfor..provideforv.提供生活费;养活;为...作准备,防备;规定provideforoldage防老15.inhighlypopulatedareas…在人口密集的地区16.onehalftoonethirdofthepopulationwaslosttotheBlackDeath有三分之一到一半的人死于黑死病.belostto不再属于...所有;对...无动于衷17.itisbelievedtobe…被认为是…18.dieoftheflu死于,因...而死.dieinthewar19.beginwith首先,endwith以...结束Eg.Knowledgebeginwithpractice.认识从实践开始。tobeginwith首先；第一点（理由）Eg.Wecan'tgo.Tobeginwith,it'stoocold.我们不能去。首先，天太冷了。endupwith以告终Eg.Heendedhisletteroffwithgoodwishestohisfriend.他给朋友的信以祝好这句话结束。ThemeetingendedupwiththesingingofTheInternationale.会议最后以唱《国际歌》而结束。20.thenumberof总数；总和作为一个集合名词，number既可以跟动词单数形式也可以跟动词复数形式。当它前面是定冠词the时，后跟单数动词.Eg.Thenumberofskilledworkersissmall.熟练工人数较少。Anumberoftheworkersareunskilled.许多工人技术不熟练21.suchasadv.例如...,象这种的;诸如...,譬如说;象...那样的;如此...以致Eg.suchthingsasiron,silver,andgold铁、银和金这一类东西22.naturaldefencesagainstthedisease对抗这种病的自然抗体23.beharmfultoEg.Smokingcanbeharmfultoyourhealth.吸烟对身体有害。24.makeupv.弥补,虚构,缝制,整理,包装,和解,编辑,化妆;补足,拼凑Eg.Shemadeupherfacetolookprettier.她把脸化了妆以便看上去漂亮些。Theboymadeupastory;itwasnottrue.男孩编了个故事，这故事不是真的。makeupabed整理床铺25.expandacrossexpandvt.使膨胀,详述,扩张vi.张开,发展Eg.Thebirdexpandeditswingsandflewoff.鸟展开翅膀飞走了expandone'sview阐述自己的观点Matchthewordsfromthepassage(1-10)withtheirmeanings(a-j)1.Effects2.Abnormal2.Physician4.Harmful5.Staff6.Aspect7.Expand8.Techniques9.Accounts10.acquirea)Doctorb)Badc)Getd)Parte)Growf)Resultsg)Resultsh)Unusuali)Waysj)workersFindthecorrectprepositionstocompleteeachofthesephrasesfromthetext1….thebeginninglifeEarth…(para.1)2….25%and50%thearea’spopulationdiedthedisease…(para3)3….wasonethekeycausesthefalltheRomanEmpire…(pare3)4….strucktheendthefirstWorldWarandcontinuedthewar..(para6)Answers:1.of,on2.of,from3.of,of,of4.near,of,afterWorkinpairs.Whichofthesethingsdoyouthinkwillhappenwithinthenext25years?1.Newdrugswillstopalldiseases.2.DoctorswillfindacureforSARS.3.Fluwilldisappear.4.AIDSwillcauselargeepidemics.copythenewwords