2018_2019学年高中英语unit21humanbiologysectionⅲlesson2lesson3—pre_reading学案

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1、SectionⅢLesson2Lesson3—Pre-reading[原文呈现]EpidemicsthroughouthistoryWithrecentpress①reportsdrawingparallels②betweenBirdFluandakillerepidemic③inthepast,JimSmithlooksthrough④thehistoryofepidemicsforcluesaboutwhatthefuturemighthold.SinceBirdFlufirstappearedin1997,ithastakenmorethanahundredlives⑤.Ma

2、nypeoplefearitcouldbethenextglobalepidemic,especiallyasscientistswhostudiedtissue⑥fromthebodiesofpeoplewhodiedof⑦the1918SpanishFluprovedthatBirdFluisamodernadaptation⑧ofthesamevirus⑨.BacteriaandviruseshavebeenaroundsincethebeginningoflifeonEarthandmanyoftoday'sdiseaseshaveexistedaslongas⑩human

3、shave.Itisimportanttolookat⑪thespreadofdiseasesthroughouthistory⑫todiscoverthecausesandeffects⑬ofepidemics,andhopefully,foresee⑭andpreventtheminthefuture.[读文清障]①press/pres/n.新闻界；报界②parallel/'pærəlel/n.极相似之处；平行线③epidemic/ˌepI'demIk/n.流行病④lookthrough看穿；审核，浏览⑤takeone'slife夺走某人的生命⑥tissue/'tIʃuː/n.

4、组织⑦dieof死于(饥饿、寒冷、疾病等身体内部因素)diefrom死于(车祸、地震、战争等外界因素)⑧adaptation/ˌædæp'teIʃn/n.变化；变种⑨as...是as引导的时间状语从句，从句中含有两个who引导的定语从句，先行词分别是scientists和people,that...是that引导的宾语从句。⑩aslongas在本句中意为“和……一样长”。还可作连词用，表示“只要”，引导条件状语从句。⑪it用作形式主语，代替不定式短语tolookat...。lookat此处表示“回顾”。⑫throughouthistory＝alloverhistory⑬cause

5、sandeffects因果⑭foresee/fɔː'siː/vt.预见历史上的传染病病例[第1～3段译文]　随着近期的媒体报道将禽流感与过去的一种致命传染病画上等号，吉姆·史密斯回顾了传染病的历史以寻找关于将来可能发生的情况的线索。自从禽流感在1997年首次出现，它已经夺去一百多人的生命。许多人担心它会成为下一个全球性的传染病，特别是在一些科学家研究了死于1918年西班牙流感的人的尸体组织后，证明了禽流感是同一种病毒的现代变异体。自从地球上有了生命，便有了细菌和病毒。当今的很多疾病存在的时间和人类历史一样长。我们有必要回顾一下历史上疾病的传播情况，从而弄清楚传染病的起因和后果，并且

6、希望将来能够预防它们的发生。Oneoftheearliestepidemicsonrecord⑮happenedabout500－550ADwhentheRomanemperoratthetimewasattempting⑯torebuild⑰theRomanEmpire.Thisepidemicsweptthrough⑱NorthAfrica,theMiddleEastandEurope.Scientistsnowguessthatupto⑲50%ofthearea'spopulationdiedfromthisepidemic⑳makingitoneofthemaincause

7、softhefalloftheRomanEmpire.Inthe1330's,theepidemicreturned,thistimeinAsia.Itspreadrapidlyandbecameknownas“TheBlackDeath”asonesymptomwasblackspotsonthebody.TheconditionsinmuchofAsiaandEurope—war,crowdedcitiesandalackofbasichealthroutines