2015-2016第一学期高二质检[来源:学.科.网Z.X.X.K]英语试卷第一部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项，并在答题卡上该项涂黑。（A）Eatingtoomuchfattyfood,exercisingtoolittleandsmokingcanraiseyourfutureriskofheartdisease.Butthereisanotherfactorthatcancauseyourheartproblemsmoreimmediately:theairyoubreathe.Previousstudieshavelinkedhighexposure(暴露）toenvironmentalpollutiontoanincreasedriskofheartproblem,buttwoanalysesnowshowthatpoorairqualitycanleadtoheartattackorstroke(中风）withinaslittleasafewhoursafterexposure.Inonereviewoftheresearch,scientistsfoundthatpeopleexposedtohighlevelsofpollutants(污染物）wereupto5%morelikelytosufferaheartattackwithindaysofexposurethanthosewithlowerexposure.AseparatestudyofstrokepatientsshowedthatevenairthattheU.S.EnvironmentalProtectionAgency(EPA)considerstobeof“moderate”(良好）qualityandrelativelysafeforourhealthcanraisetheriskofstrokeasmuchas34%within12to14hoursofexposure.Theauthorsofbothstudiesstressthattheserisksarerelativelysmallforhealthypeople[来源:学*科*网]andcertainlymodestcomparedwithotherriskfactorssuchassmokingandhighbloodpressure.However,itisimportanttobeawareofthesedangersbecauseeveryoneisexposedtoairpollutionregardlessoflifestylechoices.SostricterregulationbytheEPAofpollutantsmaynotonlyimproveenvironmentalairqualitybutcouldalsobecomenecessarytoprotectpublichealth.21.Thetextmainlydiscussestherelationshipbetween______.A.heartproblemsandairqualityB.heartproblemsandexercisingC.heartproblemsandsmokingD.heartproblemsandfattyfood22.Theunderlinedword“modest”inParagraph3mostprobablymeans______.A.relativelyhighB.extremelylowC.relativelylowD.extremelyhigh23.Theauthor’spurposeofwritingthetextismostlikelyto_______.A.describeB.persuadeC.informD.entertain（B）Desertsarefoundwherethereislittlerainfallorwhererainforawholeyearfallsinonlyafewweeks'time.Teninchesofrainmaybeenoughformanyplantstosurvive(存活)iftherainisspreadthroughouttheyear,Ifitfallswithinoneortwomonthsandtherestoftheyearisdry,thoseplantsmaydieandadesertmayform.Sandbeginsastinypiecesofrockthatgetsmallerandsmalleraswindandweatherwearthemdown.Sanddunes(沙丘)areformedaswindsmovethesandacrossthe[来源:学+科+网Z+X+X+K]desert.Bitbybit,thedunesgrowovertheyears,alwaysmovingwiththewindsandchangingtheshape.Mostofthemareonlyafewfeettall,buttheycangrowtobeseveralhundredfeethigh.Thereis,however,muchmoretoadesertthansand.InthedesertsofthesouthwesternUnitedStates,cliffs(悬崖)anddeepvalleyswereformedfromthickmudthatoncelaybeneathaseamorethanmillionsofyearsago.Overthecenturies,thewaterdriedup.Wind,sand,rain,heatandcoldallworeawayattheremainingrocks.Thefacesofthedesertmountainsarealwayschanging–-very,veryslowly---astheseforcesofnaturecontinuetoworkontherock.Mostdesertshaveasurprisingvarietyoflife.Thereareplants,animalsandinsectsthathaveadaptedtolifeinthedesert.Duringtheheatofthedayavisitormayseeveryfewsignsoflivingthings,butastheairbeginstocoolintheevening,thedesertcomestolife.Asthesunbeginstoriseagaininthesky,thedesertonceagainbecomesquietandlonely.24.Manyplantsmaysurviveindesertswhen__________________.A.itisdryalltheyearroundB.therainfallsonlyinafewweeksC.thereislittleraininayearD.therainisspreadoutinayear25.Sanddunesareformedwhen___________________.A.sandpilesupgraduallyB.thereisplentyofraininayear...
