高二英语：Unit21 lesson3 epidemics explained课件北师大版 课件VIP免费

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...