2019版高考英语unit6design夯练含解析北师大版必修2

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1、Unit6Design李仕才一、阅读理解。TheAmazonbasinregionishometoabout2.5millioninsectspecies，tensofthousandsofplants，andsome2000birdsandmammals.Todate，atleast40000plantspecies,3000fish,1294birds,427mammals,428amphibians，and378reptileshavebeenscientificallyclassified

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

3、asrevealedtreesof10centimeterdiametertobemorethan300yearsold，andsometreesover1000yearsold，indicatingthatuntouchedforestscanexperienceunbelievablelongevity.ThefirsthumaninhabitantsarethoughttohavesettledintheAmazonregionabout11200yearsago.Europeanexplo

4、rersarrivedinthe16thcentury，bringingdiseaseswhichtraveledfasterthantheexplorersthemselves，killingperhapsasmanyas90%oftheindigenousinhabitants(土著居民)．Bythelate17thcenturytheAmazonbasinwascontrolledbyPortugueseandSpanishexplorers.TheAmazonrainforesthasbe

5、endescribedasthelungsofourplanetbecauseofitsimportantroleinrecyclingcarbondioxideintooxygen.Butduetodeforestation(采伐森林)，rainforestsnowcoverlessthan5%oftheEarth'slandsurface，andexpertsbelievethatthisisabigcontributortoglobalclimatechange.Severedeforest

6、ationbeganinthe20thcentury，with587000squarekilometerslostuptotheyear2000.Mostdeforestedlandisusedforgrasslandtoraisefarmanimalsandagriculture.Theadditionoftransportrouteshasledtoincreasedsettlementanddeforestation，andatthepresentrate，scientistsestimat

7、ethattheAmazonrainforestwillbereducedby40%intwodecades.1．WhyarethefiguresmentionedinParagraph1?A．Toprovetheforestuntouched.B．Toclassifyspeciesscientifically.C．Toshowthediversityofspecies.D．ToattractmoreattentiontoAmazon.2．Whydidmostindigenousinhabitan

8、tsintheAmazonregiondie?A．Europeanexplorersbroughtdiseasesthere.B．Portugueseexplorerstreatedthembadly.C．Alotoftreeswerecutdownandburned.D．TheygotkilledbySpanishexplorers.3．WhatcanbeinferredabouttheAmazonrainforest?A．Ithasthelargestnumberofspeci