高中英语人教选修8课件Unit5.docx

高中英语人教选修8课件Unit5.docx

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高中英语人教选修8课件Unit5

成才之路・英语

人教版・选修8（通用本）

LUnits

Meetingyourancestors

■“Around500,000yearsago,atthePekingManSiteatZhoukoudianinBeijing'ssuburbanFangshandistrict,whichisabout50kmfromthecityofBeijing,therelivedearlyhumanbeings,”saysaChinahistorytextbook.

■Thetextbooknowhastoberevised.NewdatingtechniquessuggesttheremainsofPekingMan-foundinthe1920s-areover200,000yearsolderthanpreviouslythought.What'simportantaboutthatdate,about770,000yearsago,isthatthiswas

■OverEarth'slonghistory,therehavebeenanumberoftimeswheniceandsnowcoveredalargepartofitssurface.Suchperiodsareknownasiceages.

■Earthisinaniceagenow.Itstartedabout2millionyearsago.Despitethemanywarmperiodssincethen,scientistsregardthewholetimeasoneiceagebecauseofthecontinuousexistenceofatleastonelargeicesheet-theoneoverAntarctica.

■ThenewdiscoverywasmadebyChineseandUSscientists.ItsuggestsPekingManisprobablyouroldestcoldweatherhumanbeing,saidDarrylGranger,anatmospheric

scientistatPurdueUniversitywhose

researchappe

■TheaverageyearlytemperatureatthetimeinthatpartofChinawasaroundthefreezingmark,butitwastoodryforanicesheet,Grangersaid.

■Thisraisesaquestion.HowdidPekingMansurvivethecoldweather?

■RickPotts,aSmithsonianInstitutionhumanoriginsexpertwhowasn'tinvolvedintheresearch,raisedthreepossibilities:

■First,fire.EarlyfindingsshowedsignsofafireinPekingMan'scave.Buttherehasbeendebateaboutwhetherthefirewas

■Second,fur.ThereisnoevidencethatPekingManusedsimpletoolstomakemoreformfittingclothes.It'smorelikelyheworeanimalfur.

■Last,hemayhavedevelopedgraduallytohandlethecold.PekingManmayhaveexperiencedphysiologicalchangesthatallowedmorebloodtoflowtohishandsandlegs,Pottssaid.“Peopleingeneralwholiveincolderclimatestendtobeshorterandwider,”heexplained.

■UnlikethetimesofPekingMan,todaytheglobaltemperatureisrisingduetothegreenhouseeffect.Inthefuture,couldhumansdeveloptohandlethewarmthjustasPekingMandidtofightthecold?

■最新研究发现北京人的年代应该是处于冰河世纪,比我们原先的估计早二十多万年。

■1•Accordingtothenewresearch,Peking

Manactuallydatesbackto.

■A.around500,000yearsago

■B.over200,000yearsago

■C.about770,000yearsago

■D.about2millionyearsago

■答案：

C细节理解题。

由第二段最后一句话“What'simportantaboutthatdete,about770,000yearsago,isthatthiswasaniceageonEarth.〃可矢口。

■2.Whatisthemostimportantstandardforscientiststodecideaniceage?

■A.Theweatherconditions.

■B.Thecontinuousexistenceofanylargeicesheets.

■C.Theaverageyearlytemperature.

■D.Thelongperiodofsnowfall.

■答案:

B推理判断题。

由第四段第三句话"...scientistsregardthewholetimeasoneiceagebecauseofthecontinuousexistenceofatleastonelargeicesheet-theoneover

■3.WhichofthefollowingisTRUEofPekingMan?

■A.Heistheoldesthumanbeing.

■B.Heusedfiretokeepwarm.

■C.Heworeformfittingclothesmadefromfurwithsimpletools.

■D.Hemighthavebeenshorterandwiderthanpreviouslythought.

蠱答案：

D细节理解题。

由倒数第二段；

“Peopleingeneralwholiveincolderclimatestendtobeshorterandwider〃可推牟仃一卄亩人台耳卜匕珏们百*帝亜锤日虹

■4.Whatdoesthepassagemainlywanttoconveytous?

■A.ThelatestdiscoveryaboutPekingMan.

■B.ThelifeofPekingManduringiceage.

■C.ThewaythePekingManusetofightagainstcoldness.

■D.ThetimethePekingMandatefrom.

■答案：

A主旨大意题。

本文是报道类文章

第二段第一句即点明了本文的中心一北京人的年代应该是处于冰河世纪，比我们原先砧丄曰一丄仝+仁

■5.Thepassagecanprobablybefoundin

■A.ahistorytextbook

■B.ascientificmagazine

■C.aresearchreport

■D.anentertainmentnewspaper

■答案：

B推理判断题。

本文主要介绍了最新的发现，最应该岀现的地方是科学杂志，故选B项。