2022公共英语一级备考试题含答案2022公共英语一级备考试题（含答案）AntarcticaandEnvironmentAntarcticahasactuallybecomeakindofspacestation-auniqueobservationpostfordetectingimportantchangesintheworld‘senvironment.Remotefrommajorsourcesofpollutionandthecomplexgeologicalandecologicalsystemsthatprevailelsewhere，Antarcticamakespossible第1页共14页scientificmeasurementsthatareoftensharperandeasiertointerpretthanthosemadeinotherpartsoftheworld.GrowingnumbersofscientiststhereforeseeAntarcticaasadistant-early-warningsensor，wherepotentiallydangerousglobaltrendsmaybespottedbeforetheyshowuptothenorth.Onepromisingfieldofinvestigationisglaciology.ScholarsfromtheUnitedStates，Switzerland，andFrancearepursuingsevenseparatebutrelatedprojectsthatreflecttheirconcernforthehealthoftheWest第2页共14页AntarcticIceSheet-aconcerntheybelievetheworldatlargeshouldshare.TheTransantarcticMountain，someofthemmorethan14，000feethigh，dividethecontinentintotwoverydifferentregions.Thepartofthecontinenttothe“east”ofthemountainsisahighplateaucoveredbyanicesheetnearlytwomilesthick.“West”ofthemountain，thehalfofthecontinentsouthoftheAmericasisalsocoveredbyanicesheet，buttheretheicerestsonrockthatismostly第3页共14页wellbelowsealevel.IftheWestAntarcticIceSheetdisappeared，thewesternpartofthecontinentwouldbereducedtoasparseclusterofisland.Whileiceandsnowareobviouslycentraltomanyenvironmentalexperiments，othersfocusonthemysterious“dryvalley”ofAntarctica，valleysthatcontainlittleiceorsnoweveninthedepthsofwinter.SlashedthroughthemountainsofsouthernVictoriaLand，thesevalleysonceheldenormousglaciersthatdescended9，000feetfromthe第4页共14页polarplateautotheRossSea.Nowtheglaciersaregone，perhapsacasualtyoftheglobalwarmingtrendduringthe10，000yearssincetheiceage.Eventhesnowthatfallsinthedryvalleysisblastedoutbyviciouswindsthatroarsdownfromthepolarplateautothesea.Leftbarearespectaculargorges，rippledfieldsofsanddunes，clustersofboulderssculpturedintofantasticshapesby100-mile-an-hourwinds，andanauraofextraterrestrialdesolation.Despitetheunearthlyaspectofthedryvalleys，some第5页共14页scientistsbelievetheymaycarryamessageofhopeoftheverdantpartsoftheearth.Somescientistsbelievethatinsomecasesthedryvalleysmaysoakuppollutantsfasterthanpollutantsenterthem.1.Whatisthebesttitleforthispassage?[A]AntarcticaandenvironmentalProblems.[B]Antarctica：Earth‘sEarly-Warningstation.[C]Antarctica：aUniqueObservationPost.[D]Antarctica：aMysteriousPlace.第6页共14页2.WhatwouldtheresultbeiftheWestAntarcticIceSheetdisappeared?[A]Thewesternpartofthecontinentwouldbedisappeared.[B]Thewesternpartofthecontinentwouldbereduced.[C]ThewesternpartofthecontinentwouldbecomescatteredIslands.[D]ThewesternpartofthecontinentwouldbereducedtoaclusterofIslands.第7页共14页3.WhyaretheDryValleysleftbare?[A]Viciouswindblaststhesnowaway.[B]Itrarelysnows.[C]Becauseoftheglobalwarmingtrendandfiercewind.[D]Sanddunes.4.Whichofthefollowingistrue?[A]The“DryValleys”havenothingleftinside.[B]The“DryValleys”neverheldglaciers.[C]The“DryValleys”maycarryamessageofhopefor第8页共14页theverdant.[D]The“DryValleys”areuselesstoscientists.Vocabulary1.distant-early-warningsensor远距离早期报警传感器2.plateau高原，高地3.slash挥砍4.blast一阵疾风/狂风5.vicious邪恶的，凶魔般的6.gorge峡谷第9页共14页7.ripple起伏，使起微波8.sanddune沙丘9.verdant绿色10.extraterrestrial地球之外的11.aura...
