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北师大版Unit21Unit21HumanBiologyLesson3EpidemicsExplainedDiseasesheadache,backache,toothache,stomachacheInfluenza,cold,fever,stomachulcerTBTheBeriberimentaldiseaseThesmallpoxSARSSyndromesofAcuteRespiratorySystemAIDSAcquiredImmuneDeficiencySyndromeHIVHumanImmuneVirusTBTuberculosisLookattheKeyWords.Whichofthesediseasescanbeepidemics?AIDS,cancer,headache,flu,heartdisease,stomachacheAIDS,fluAnswer:艾滋病淋巴结肿大流感病毒☆鼠疫：英文名称：Bubonicplague或Blackplague,由耶尔森氏菌经老鼠或其他啮齿动物寄生的跳蚤而传播的一种急性传染病，病人头疼、高烧，淋巴结肿大，臀部、腿部及全身出现黑斑，且会咳出暗黑色的血，故又称黑死病。在人类历史上曾多次大面积爆发，其蔓延地域之广，持续时间之长，造成的死亡率之高，都是别的传染病无法比拟的。画家笔下的中世纪黑死病景象母亲抱着她死去的孩子神职人员忙着处理因黑死病死者“西班牙流感”的病状十分可怕，感染者的面部先会因为缺氧而变成黑紫，血有时会从患者的耳朵、眼睛和鼻子中流出。该病发病时间短，有些人早上发病，到晚上即宣告不治。也有的会拖上几天，慢慢因为肺部充满血样液体而窒息身亡。西班牙流感比黑死病还致命，在欧洲和非洲造成上百万人丧命，印度也有1200万人因此丧生。甲流肆虐排队接种甲流疫苗预防甲流Workinpairs.Doyouthinkthesestatementsaretrue(T)orfalse(F)?1)Flukillsmillionsofpeopleeveryyear.2)Mostdiseasesareverynew.3)Epidemicshaveaffectedhistoricalevents.TTT5)Epidemicscanwipeoutuptohalfofthepopulationinurbanareas.6)Morepeoplediedofafluepidemicin1918/1919thandiedinWorldWarI.4)Ittakesyearsforadiseasetospreadworldwide.TFTMatchthefiveparagraphs(A-E)withgaps3,5,8,10and12inthetext.ABCDEParagraph3Paragraph5Paragraph8Paragraph10Paragraph12ReadingCompletethesesentencesaboutthetextinyourownwords.1.Weknowthatepidemicshavebeenwithusforthousandsofyearsbecause…2.AnepidemicmayhavebeenoneofthekeycausesofthefalloftheRomanEmpirebecause…3.The“BlackDeath”spreadrapidlyinAsiaandEuropebecause…4.SARSspreadfromHongKongtoCanada,VietnamandSingaporebecause…5.ManydoctorsandnursesbecameillwithSARSbecause…AboutthePlague550AD,RomanemperorJustinian,25%--50%,themainreasonwhytheRomanempirefellAbouttheBlackDeath1330s,inAsia,…providingperfectconditionsforthespreading.½to1/3waslostto…AboutGreatFluEpidemicof1918ThemostacuteworldwideepidemicinthehistorySARSLiuJianjuncametoHongkong,passedthevirustopeople.ThencarrierscarriedittoCanada,…Languagepoints1.populated:adj.有人居住的athicklypopulatedcity人口稠密的城市densely[sparsely]populatedcity人口稠密[稀少]的城市Thenewlandwasquicklypopulatedbythenewsettlers.2.abnormal:adj.不正常的,反常的;变态的我们认为这样的反常现象不会持续很久。Wedonotthinksuchanabnormalphenomenonwilllastlong.Thatissimplyabnormal.3.severely:严格的;严厉的他受到严惩。Hewasseverelypunished.Dangerousdrivingshouldbeseverelypunished.beseverelyill/wounded患重病/负重伤leave/letseverelyalone敬而远之4.原因和影响causesandeffects5.人们估计……Peopleestimatethat…/Itisestimatedthat…6.死于……:dieof/diefromThisisbecauseeachyearmillionsofsmokersdiefromsmoking.diefrom/dieof均可表示“因……而死亡”;指疾病造成的死亡用dieof和diefrom均可。diefrom还可表示因外部创伤或间接的原因而死。如:diefromawound,diefromoverwork,diefrompollutedairdieof常指因内部原因造成的死亡,如:疾病、饥渴、年老、悲伤、事故等。dieofdisease/hunger/oldage/sadness/accidentdieby指死于暴力,刀或剑等凶器。如:diebythesword/hangingdiefor为某种事业或目的而死。如:dieforone’scountry/thepeople/therevolutionarycausedieinpoverty因贫穷而死dieaway逐渐减弱、消失dieout绝迹、灭亡Thenoisediedout.ThiscustomerhasdiedoutinChina.bedyingfor极想得到……Sheisdyingforapianoofherown.TheyaredyingforavisittotheGreatWall.Thanksforattending!!