江苏专用2016_2017学年高中英语unit3backtothepastperiodonewelcometotheunit&reading讲义牛津译林版 (2)

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1、Unit3BacktothepastScientificAssumption：theRealCauseoftheRomanEmpireCollapsingClimatechangecouldhavebeenresponsibleforbringingdowntheRomanEmpire，scientistsbelieve.Researchersstudiedancienttreegrowthringstoshowlinksbetweenclimatechangeandmajoreventsinhumanhistorysuchasmigrations，plagueandtherise

2、andfallofempires.Theydiscoveredthatperiodsofwarm，wetweathercoincidedwithperiodsofprosperity，whiledroughtsorvaryingconditionsoccurredattimesofpoliticalupheavalsuchasthedemiseoftheRomanEmpire.Tomatchtheenvironmentalrecordwiththehistoricalone，researcherslookedatmorethan7,200treefossilsfromthepast

3、2,500years.Thestudy，publishedinthejournalScience，said：Theriseandfallofpastcivilizationshavebeenassociatedwithenvironmentalchange，mainlyduetoeffectsonwatersupplyandagriculturalproductivity，humanhealthandcivilconflict.WetandwarmsummersoccurredduringperiodsofRomanandMedievalprosperity.Increasedcl

4、imatevariabilityfromAD250to600coincidedwiththedemiseoftheWesternRomanEmpireandtheturmoiloftheMigrationPeriod.Notes1．plaguen．瘟疫2．coincidev．同时发生3．upheavaln．剧变4．demisen．终止，失败5．turmoiln．动乱Task根据上文完成下列各题1．Accordingtothescientists，whatcausedthefalloftheRomanEmpire?Climatechange.2．Whatdoscientiststhi

5、nkthesummerswerelikeduringperiodsofRomanprosperity?Wetandwarm.PeriodOne　Welcometotheunit&Reading　　　　　　　　　　　　　　　　　　　Ⅰ.单词自测1．civilizationn．文明civilizevt.使文明，使开化2．lecturen．讲座3．foundvt.创建，兴建founded(过去式)founded(过去分词)4．eruptvi.(火山等)爆发eruptionn．爆发，喷发5．pourvi.涌流，倾泻；vt.倒出(液体)6．unfortunateadj.不幸的，遗憾的7．de

6、coratevt.装饰，装潢decorationn．装饰；装饰品8．fleevt.&vi.逃避，逃跑；迅速离开fled(过去式)fled(过去分词)9．researchern．研究者，调查者researchn．调查，研究；vt.从事……的研究，为……而做研究10．disastern．灾难11．destroyvt.摧毁，毁坏12．commercialadj.商业的，贸易的13．wealthyadj.富有的，富裕的wealthn．财产，财富14．graduallyadv.渐渐地，逐渐地gradualadj.逐渐的15．culturaladj.文化的culturen．文化16．ruinn

7、．废墟；毁坏；vt.破坏，毁灭17．remainsn．遗物，遗迹，遗骸remainvi.剩下，留下remainingadj.剩余的18．beneathprep.在……之下19．materialn．材料；物质；adj.物质的20．explodevi.爆炸explosionn．爆炸explosiveadj.爆炸的，易爆炸的21．nearbyadv.&adj.在附近(的)Ⅱ.短语自测1．protect...from保护……免受……2．beknownas作为……而出名3．ta