北京市人大附中2021高考英语阅读理解一轮选编

-1-/9北京市人大附中 2021 高考英语阅读理解一轮选编阅读下列四篇短文，从每小题后所给的 A,B,C 或 D 四个选项中，选出最佳选项。ScientistshavefoundwhatlooklikecavesonMars（火星），andsaytheycouldbeprotectinglifefromtheplanet'sterribleenvironment.ThefirstcavesdiscoveredbeyondtheEarthappearassevenmysteriousblackdotsonthepicturessentbackbyNASA'sMarsOdysseyorbiter.Eachaslargeasafootballfield,theymaybeopeningsintonaturalcavesbelowtheMartiansurface.“IfthereislifeonMars,thereisagoodchanceyou'dfinditincaves,”saidJutWynne,oneoftheresearcherswhonoticedthefeatureswhileworkingonaUSGeologicalSurveyMarsCaveDetectionProgram.JonathanClarke,ageologistwiththeMarsSocietyofAustralia,yesterdaydescribedthediscoveryasexciting.Onephototakenatnightbyaninfraredimager（红外线成像器）showedoneholetobeunusuallywarm,suggestinghotairtrappedduringthedayisflowingout.“Isaid:‘Wow,that'sacave.'”Dr.Clarkesaidexcitedly.“Peoplehavebeenlookingfortheseforalongtime;nowwehavefoundthem.”Heagreedsuchcaveswouldbeperfectplacestohuntforlifeescapingfromthebitterlycold,radiation-soaked（充满辐射的），drysurface.-2-/9“Tinydropsofwatercouldcollectinside,”hesaid.“Iftherearegasescomingout,theycouldprovideenergyforawholerangeofbacteria.Acaveisalsoaprotectionfromradiation;thesurfaceofMarsisexposedtohighlevelsofspaceradiation.Thecavesprobablyformedwhentube-shapedlavaflows（管状岩浆流）spreadacrosstheplanetlongago.Theoutsideofthetubescooled,formingsolidwalls,whilesomethinghotterinsideallowedtheremaininglavatoflowout,formingcaves.”1. Whatdoesthepassagemainlytalkabout?A. HowthecaveswereformedonMars.B. HowscientistsfoundthesecavesonMars.C. CavesonMarsmaybefullofhotairorasignoflife.D. ScientistshavecompletelyrecognizedthesurfaceofMars.2. Wecanlearnfromthepassagethat.A. waterhasalreadybeenfoundonMarsB. thescientistsfoundallthecavesatnightC. itiscertainthatthereislifeinthesecavesD. thesurfaceofMarsisbitterlycold,radiation-soakedanddry3. Accordingtothepassage,Dr.Clarkewassoexcitedbecause.A. suchcavescould...