2012屆高考英語二輪復(fù)習(xí) 閱讀理解部分之限時(shí)訓(xùn)練（四）

PAGE4-用心愛心專心2012屆高考英語二輪專題復(fù)習(xí)精品閱讀理解部分之限時(shí)訓(xùn)練（四）閱讀理解Abreathtakingtrickpotentiallyleftoverfromourancestorsmightbefoundinus—theabilitytosenseoxygenthroughourskin.Amphibians(兩棲動物),animalssuchasfrogsthatcanlivebothonlandandinwater,havelongbeenknowntobecapableofbreathingthroughtheirskin.Infact,thefirstknownlunglessfrogthatbreathesonlythroughitsskinwasdiscoveredrecentlyintheriversofBorneo.Nowthesameoxygensensorsfoundinfrogskinsandinthelungsofmammalshaveunexpectedlybeendiscoveredintheskinofmice.“Noonehadeverlooked,”explainedRandallJohnson,abiologistresearcher.Miceandfrogsarequitedistantrelatives,sothefacttheyhavethesemolecules(分子)incommonintheirskinsuggeststheymightwellbefoundintheskinofothermammals,suchashumans.“Wehavenoreasontothinkthattheyarenotintheskinofpeopletoo,”Johnsonsaid.Thesemoleculesnotonlydetectoxygen,buthelpincreaselevelsofvitalredbloodcells,whichcarryoxygenaroundthebody.Normalmicebreathinginairthatis10percentoxygen—adangerouslylowlevelsimilartoconditionsatthetopofMountEverest,andabouthalfthatofairatsealevel.However,micethathadtheoxygensensorHIF-1aThesefindings,iftheyholdtrueinhumans,suggestonecouldraisethelevelofoxygencirculatinginsidethebody.Thiscouldhelptreatlungdiseasesanddisorderssuchasanemia(貧血癥)withoutinjectingdrugs,whichmakeupamultibillion-dollarmarket,Johnsonsaid.Athletesalsooftentrytogetmoreoxygendeliveredtotheirmusclesinordertoimprovetheirperformance.Theyoftendothisbytrainingathighaltitudesorinlow-oxygentents.Thenewstudysuggeststheymightwanttoexposetheirskinaswellasbreathinginlow-oxygenairtoimprovetheirperformance.“It’shardtosaywhatexactlymightbedone,however—there’salotwedon’tknowyet,”Johnsonexplained.ThescientistsdetailedtheirfindingsintheApril18issueofthejournalCell.64.WhichofthefollowingstatementsisTRUEaccordingtothepassage?A.Johnsonbelievesthatoxygensensorsalsoexistinhumanskin.B.PeoplehavetosurftheInternettoreaddetailedfindings.C.IthasbeenprovedthatthesefindingshelptreatlungdiseasesD.Ithaslongbeenexpectedoxygensensorsexistinmice’sskin.

65.Oneofthefunctionsofthemoleculesmentionedaboveis_______.A.carryingoxygenaroundthebody

B.improvingathletes’performanceC.detectingoxygen

D.increasinglevelofoxygen66.WhatisJohnson’sattitudetotheapplicationofthefindingstotheathletes’training?A.Negative

B.Doubting

C.Positive

D.Hesitating67.Thebesttitleofthepassagemaybe_______.A.GreatFindingsBenefitAthletesALotB.FrogsAndMiceAreDistantRelativesC.FirstKnownAnimalBreathesThroughSkinD.HumansMightSenseOxygenThroughSkin完形填空（共20小題；每小題1分，滿分20分）Afarmerhadsomepuppies(小狗)heneededtosell.Hepaintedasign36thepuppiesandsetaboutnailingittoapostonthe37ofhisyard.Ashewas38thelastnailintothepost,hefeltapullonhisclothes.Helookeddown39theeyesofalittleboy.“Mister,”hesaid,“Iwanttobuyoneofyourpuppies.”“40,”saidthefarmer,asherubbedthesweatoffthebackofhisneck,“thesepuppiescomefromfine41andcostmuchmoney.”Theboydroppedhisheadforamoment.Thenreaching42intohispocket,hepulledouta43ofcoinsandsaidtothefarmer.“I'vegotthirty-ninecents.Isthatenoughtotakealook?”“Sure,”saidthefarmer,andwiththathe44awhistle45fromthedoghouseranDollyfollowedbyfourlittleballsoffur.Thelittleboy46hisfaceagainstthechainlinkfence.Hiseyesdancedwith47.Asthedogsmadetheir48tothefence,thelittleboynoticedsomethingelse.Anotherlittleballappeared,obviously49.Inasomewhat50mannerthelittlepuppybeganhobblingtowardtheothers,doingitsbesttocatchupwithothers.“Iwantthatone,”thelittleboysaid,pointingtoit.Thefarmer51downattheboy'ssideandsaid,“Son,youdon't.Hewillneverbeabletorunandplaywithyouliketheseotherdogs.”52thatthelittleboysteppedbackfromthefence,53down,andbeganrollinguponelegofhistrousers.Indoingsoheexposedasteelbrace(支持物)attachingitselftoa54madeshoe.Lookingup,hesaid,“Youseesir,Idon'truntoowellmyself,andhewillneedsomeonewhounderstands.”Yes,theworldisfullofpeoplewhoneedsomeonewho55.36.A.introducing B.showing C.advertising D.explaining37.A.back B.edge C.center D.top38.A.driving B.pushing C.entering D.taking39.A.to B.on C.for D.into40.A.Certainly B.Well C.Sorry D.Likely41.A.parents B.friends C.relatives D.customers42.A.deeply B.deep C.wide D.widely43.A.number B.piece C.handful D.deal44.A.wentout B.tookout C.letout D.foundout45.A.Away B.Far C.Out D.Into46.A.felt B.placed C.pushed D.pressed47.A.tears B.delight C.fear D.sorrow48.A.way B.direction C.path D.route49.A.whiter B.fatter C.thinner D.slower50.A.awkward B.forward C.smart D.interesting51.A.looked B.lay C.pointed D.knelt52.A.For B.In C.About D.With53.A.reached B.arrived C.lay D.put54.A.specially B.especially C.exactly D.naturally55.A.loves B.understands C.shares D.cares任務(wù)型閱讀：請認(rèn)真閱讀下面短文，在表格中的空格里填上最恰當(dāng)?shù)膯卧~(每空1個(gè)單詞)Sincethebeginningofhumanevolution,menhavemigrated（遷移）acrosscontinentsinsearchoffood,shelter,safety,andcomfortableweather.Peoplestillmoveforthesereasons,butnewreasonsforhumanmigrationarearising,suchasjobrelocation(重新安置)andoverpopulation.Threemillionmigrantsaremovingfrompoorcountriestowealthieroneseachyear,andincreasingly,theirdestinationisaneighboringcountryindevelopingpartsoftheworld.Peoplearemovingwithinthedevelopingworldforthesamereasonsastheymigratetowealthiernations.Peoplefrompoorcountriesaregoingtolesspoorcountries,fleeingwarsandconflicts.Theyarealsorespondingtopopulationpressuresbecausesomecountriesaredenselypopulated,andtheyoftenhavehighpopulationgrowth.Thosepeopleneedtogosomewhereelse.Therearethreemainreasonswhypeoplemove.Thebasiccategoriesandpercentagesareasfollows,accordingtotheCurrentPopulationSurveys(CPS):Family-relatedreasonsaccountfor26.3%,includingchangesinmarital（婚姻的）status,establishingahouseholdandotherfamilyreasons;work-relatedreasons16.2%,includingjobtransfer,retirement,andotherjob-relatedreasons;housing-relatedreasons51.6%,includingnewandbetterhouses,betterneighborhood,cheaperhousingandotherhousingreasons;theremaining5.9%ofotherreasonsareattendingcollege,thechangeofclimateandhealthreasons.Americanshavebeenmigratingsouthandwestfordecadesinsearchofbetterjobopportunitiesandwarmerclimates.Theyhavealsobeenmovingtoplacesalittlefarfromcities,insearchofbiggeryardsandhouses,lowercrimeratesandbetterschools.In1950,nearlyafifthofthepopulationlivedinthenation’s20largestcities.In2006,itwasaboutoneinten.That’swhymanyAmericanpeoplesay,“BigCitiesShrinkasPeopleMoveSouth,West.”BetweenMarch2005andMarch2007,73.4millionAmericansmoved.Fifty-sixpercentofthesemoveswerewithinthesamecountry.Twentypercentwerebetweencountiesbutinthesamestate.Nineteenpercentweremovestoadifferentstate.Somefamiliesevenwentabroad.Title:Peopleonthe