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1、Unit21HumanBiologyLesson3EpidemicsExplainedwordsexercise1LookattheKeyWords.Whichofthesediseasescanbeepidemic?AIDSCancerHeadacheFluHeartdiseaseStomachacheTBEpidemics:exercise2Workinpairs.Doyouthinkthesestatementsaretrue(T)orfalse(F)?1.TBandflukillmillionsofpeopleeveryyear.2.Mostofdiseasesa
2、reverynew.3.Epidemicshaveaffectedhistoricalevents.4.Ittakesyearsforadiseasetospreadworldwide.5.Epidemicscanwipeoutuptohalfofthepopulationinhighlypopulatedareas.6.Morepeoplediedofafluepidemicin1918/1919thandiedinWorldWarI.readingstrategies:Sequencingofinformation:1.readthetextwithgapstoget
3、thegeneralideaandseehowitdevelops.2.Readthesentencesbeforeandafterthegapstogiveyouanideaofwhatthebeginningorendofthemissingparagraphmightreferto.3.Readthemissingparagrapphsandlookforthesereferences.4.Ifaparagraphdoesn’tseemtofit,youmayhavemadeamistake,socarefullyrereadeachparagraph.exerci
4、se3Nowusethestrategiestomatchthefiveparagraphs(A-E)withgaps2,4,7,9and11inthetext.Theanswers:ParagraphAParagraphBParagraphCParagraphDParagraphEGap2Gap4Gap7Gap9Gap11exercise4Completethesesentencesaboutthetextinyourownwordsexercise5Howdidyoufeelafterreadingthearticle?TelltheclassVoiceyouropi
5、nion: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
6、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.Youmayborrowthisbookaslongasyoupromi
7、setogiveitback.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
