2019版高考英语Unit6Design夯练含解析北师大版必修2.docx

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1、Unit6Design李仕才一、阅读理解。TheAmazonbasinregionishometoabout2.5millioninsectspecies，tensofthousandsofplants，andsome2000birdsandmammals.Todate，atleast40000plantspecies,3000fish,1294birds,427mammals,428amphibians，and378reptileshavebeenscientificallyclassifiedintheregion.

2、OneinfiveofallthebirdsintheworldliveintherainforestsoftheAmazon.Thewarmwetforestshavebeeninexistencefor55millionyears，andthrivedevenduringglacialperiods，allowingfortheevolutionofanunbelievablediversityofspecies.Radiocarbondating(放射性碳年代测定)hasrevealedtreesof10centi

3、meterdiametertobemorethan300yearsold，andsometreesover1000yearsold，indicatingthatuntouchedforestscanexperienceunbelievablelongevity.ThefirsthumaninhabitantsarethoughttohavesettledintheAmazonregionabout11200yearsago.Europeanexplorersarrivedinthe16thcentury，bringing

4、diseaseswhichtraveledfasterthantheexplorersthemselves，killingperhapsasmanyas90%oftheindigenousinhabitants(土著居民)．Bythelate17thcenturytheAmazonbasinwascontrolledbyPortugueseandSpanishexplorers.TheAmazonrainforesthasbeendescribedasthelungsofourplanetbecauseofitsimpo

5、rtantroleinrecyclingcarbondioxideintooxygen.Butduetodeforestation(采伐森林)，rainforestsnowcoverlessthan5%oftheEarth'slandsurface，andexpertsbelievethatthisisabigcontributortoglobalclimatechange.Severedeforestationbeganinthe20thcentury，with587000squarekilometerslostupt

6、otheyear2000.Mostdeforestedlandisusedforgrasslandtoraisefarmanimalsandagriculture.Theadditionoftransportrouteshasledtoincreasedsettlementanddeforestation，andatthepresentrate，scientistsestimatethattheAmazonrainforestwillbereducedby40%intwodecades.1．Whyarethefigure

7、smentionedinParagraph1?A．Toprovetheforestuntouched.B．Toclassifyspeciesscientifically.C．Toshowthediversityofspecies.D．ToattractmoreattentiontoAmazon.2．WhydidmostindigenousinhabitantsintheAmazonregiondie?A．Europeanexplorersbroughtdiseasesthere.B．Portugueseexplorers

8、treatedthembadly.C．Alotoftreeswerecutdownandburned.D．TheygotkilledbySpanishexplorers.3．WhatcanbeinferredabouttheAmazonrainforest?A．Ithasthelargestnumberofspeci