吉林临江市2016高考英语阅读理解【二轮】基础练习（1）及答案

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1、吉林临'江市2016高考英语阅读理解【二轮】雎础练习（1）及答案阅读理解。阅读下列短文，从给的网个选项（A、B、C和D）屮，选出最佳选项。Nowscientistsbelievethatglobalwarmingaffectshibernatinganimals,causingthemtowakeupearlier.Whilethismayseemalittleconcern，itisinfactasignificantenvironmentalproblem.Theshortenedhibernat

2、ionperiodcouldactuallyleadtosignificantdeclinesinthepopulationofseveralspecies.SomeofthefirstconcreteevidenceofthephenomenoncamefromColorado,whereresearchersattheRockyMountainBiologicallabhavebeenobservingmarmot（旱獭）hibernationbehaviorsincethe1970s.Inthe

3、earlydaysoftheirstudies，marmotsgenerallyhibernatedseveralweeksintothemonthofMay.Nowadays，however，temperaturesintheareahaverisenby2.5degreesFahrenheit,andthemarmotswakeupaboutamonthearlier.Atleastthemarmotsarestillhibernating.Severalotheranimalshavenotbe

4、enhibernatingatallrecently.BrownbearsintheSpanishCantabrianMountainsdidnothibernatelastyear.InpartsoftheUnitedStates，chipmunks（花鼠）alsoskippedthehibernationperiod.Thebearsseemtohavesurvivedwithoutlosingmanyindividuals.Thechipmunks,however，werenotsolucky.

5、Manyoftheanimalsdiedofstarvationduringthewinter.Theproblemwithanimalswakingupearly，orskippinghibernationaltogether,lieswiththecreatures’metabolism（新P东4戈i射）.Whentheanimalshibernate,theirmetabolismdropssignificantly.Theanimals’heartrateslows，andtheyrequir

6、everylittleenergytolive.Whentheanimalsawakefromtheirwinterslumber，theirmetabolismreturnstonormal.Butwhiletheirmetabolismmaybeasactiveasitwasbeforehibernation，foodsourcesaren’tasavailableastheywerebefore.Amarmotmaywakeupwhentemperaturesgetwarmer，thinking

7、it’sspring,butplantswillnothavegottheamountofsuntheyneedtosignaltheirspringperiodofgrowth.Sountiltheplantsgrow，themarmotshavenoreliablefoodsource.Manyscientistsbelievetheproblemwillcontinuetogetworse.Inadditiontochangesinhibernationpatterns，somebelievet

8、hatotheranimalswillalsobegintochangetheirmigrationpatternsorbegintogivebirthearlier.Formanybiologists,that’sascaryprospect.TerryRoot,ananimalexpertatStanfordUniversity，said，“Idothinkwhatwewillbefacingistheextinctionofmanyspecies.