2019年高考英语真题分类汇编：专题16-科普类说明文(含答案解析)

22专题十六阅读理解之科普类说明文1.【2015·湖北卷】DTheoddnessoflifeinspaceneverquitegoesaway.Herearesomeexamples.Firstconsidersomethingassimpleassleep.Itspositionpresentsitsownchallenges.Themainquestioniswhetheryouwantyourarmsinsideoroutsidethesleepingbag.Ifyouleaveyourarmsout,theyfloatfreeinzerogravity,oftengivingasleepingastronautthelookofafunnyballed（芭蕾）dancer.“I’maninsideguy,”MikeHopkinssays,whoreturnedfromasix-monthtourontheInternationalSpaceStation.“Iliketobewrappedup.”Onthestation,theordinarybecomesstrange.TheexercisebikefortheAmericanastronautshasnohandlebars.Italsohasnoseat.Withnogravity,it’sjustaseasytopedalviolently.Youcanwatchamoviewhileyoupedalbyfloatingamicrocomputeranywhereyouwant.Butstationresidentshavetobecarefulaboutstayinginoneplacetoolong.Withoutgravitytohelpcirculateair,thecarbondioxideyouexhale(呼气)hasatendencytoformaninvisible（隐形的）cloudaroundyouhead.Youcanendupwithwhatastronautscallacarbon-dioxideheadache.LeroyChiao,54,anAmericanretiredastronautafterfourflights,describeswhathappensevenbeforeyoufloatoutofyourseat,”Yourinnerearthinksyour’refalling.Meanwhileyoureyesaretellingyouyou’restandingstraight.Thatcanbeannoying—that’swhysomepeoplefeelsick.”Withinacoupledays—trulyterribledaysforsome—astronauts’brainslearntoignorethepanickysignalsfromtheinnerear,andspacesicknessdisappears.Spacetravelcanbesodelightfulbutatthesametimeinvisiblydangerous.Forinstance,astronautslosebonemass.That’swhyexerciseisconsideredsovitalthatNationalAeronauticsandSpaceAdministration(NASA)putsitrightontheworkdayschedule.Thefocusonfitnessisasmuchaboutscienceandthefutureasitisaboutkeepinganyindividualastronautsreturnhome,and,moreimportantly,howtomaintainstrengthandfitnessforthetwoandahalfyearsormorethatitwouldtaketomakearound-triptoMars.63.Whatisthemajorchallengetoastronautswhentheysleepinspace?A.DecidingonapropersleeppositionB.Choosingacomfortablesleepingbag22C.SeekingawaytofallasleepquicklyD.Findingarighttimetogotosleep.64.Theastronautswillsufferfromacarbon-dioxideheadachewhen_____.A.theycirclearoundontheirbikes22B.theyusemicrocomputerswithoutastopC.theyexerciseinoneplaceforalongtimeD.theywatchamoviewhilepedaling65.Someastronautsfeelsickonthestationduringthefirstfewdaysbecause_____.A.theirsensesstopworkingB.theyhavetostandupstraightC.theyfloatoutoftheirseatsunexpectedlyD.whethertheyareabletogobacktothestation66.OneoftheNASA’smajorconcernsaboutastronautsis_____.A.howmuchexercisetheydoonthestationB.howtheycanremainhealthyforlonginspaceC.whethertheycanrecoverafterreturninghomeD.whethertheyareabletogobacktothestation【解析】试题分析：这是一篇说明文。本文通过举例说明了太空生活的奇妙：在太空睡觉时，对宇航员来说主要的挑战在于恰当的睡眠姿势；宇航员在一个地方运动久了会出现碳毒性头痛；宇航员的大脑接收到矛盾的信息时会感到恶心。最后告诉我们美国国家宇航局对宇航员主要的担心是宇航员回家后的修养期和如何在太空长久地保持健康。63.A细节理解题。根据第二段第一、二句“Firstconsidersomethingassimpleassleep.Itspositionpresentsitsownchallenges.”可知在太空睡觉时，对宇航员来说主要的挑战在于恰当的睡眠姿势。故选A项。64.C细节理解题。根据第三段中“Butstationresidentshavetobecarefulaboutstayinginoneplacetoolong.…Youcanendupwithwhatastronautscallacarbon-dioxideheadache”可知宇航员在一个地方运动久了会出现碳毒性头痛。故选C项。65.D细节理解题。根据第四段中“Yourinnerearthinksyou’refailing.Meanwhileyoureyesaretellingyouyou’restandingstraight.Thatcanbeannoying-that’swhysomepeoplefeelsick.”可知宇航员在大脑接收到矛盾的信息时会感到恶心。故选D项。66.B细节理解题。根据最后一段倒数第一、二句“Thefocusonfitnessisasmuchaboutscienceandthefutureasisaboutkeepinganyindividualastronauthealthy…NASAisworriedabouttwothings:…and,moreimportantly,howmaintainstrengthandfitness…”可知美国国家宇航局对宇航员主要的担心之一是如何在太空长久地保持健康。故选B项。22【考点定位】说明文阅读【名师点睛】科普类说明文历来是高考阅读理解命题的重点，文章逻辑性强，条理清楚，主要考查学生对语篇的整体把握和领悟能力以及对特定细节的认读和处理能力。考生应注意：1.平时多读科普知识类文章，学习科普知识，积累常见的科普词汇，从根本上提高科普英语的阅读能力。2.熟悉科普类文章的结构特点。科普类文章一般由标题（高考题中一般不给出标题）、导语、背景、主体和结尾五部分构成。导语一般位于整篇文章的首段。背景交待一个事实的起因。主体则对导语概括的事实进行详细叙述，这部分是命题的重点，考生应该重点把握。结尾往往也是中心思想的概括，并与导语相呼应，命题者常在此要设计一道推理判断题。3.在进行推理判断时，考生一定要以阅读材料所提供的科学事实为依据，同时所得出的结论还应符合基本的科普常识。2.【2015·北京卷】C22LifeintheClearTransparentanimalsletlightpassthroughtheirbodiesthesamewaylightpassesthroughawindow.Theseanimalstypicallylivebetweenthesurfaceoftheoceanandadepthofabout3,300feet—asfarasmostlightcanreach.Mostofthemareextremelydelicateandcanbedamagedbyasimpletouch.SonkeJohnsen,ascientistinbiology,says,“Theseanimalslivethroughtheirlifealone.Theynevertouchanythingunlessthey’reeatingit,orunlesssomethingiseatingthem.”Andtheyareasclearasglass.Howdoesananimalbecomesee-through?It’strickierthanyoumightthink.Theobjectsaroundyouarevisiblebecausetheyinteractwithlight.Lighttypicallytravelsinastraightline.Butsomematerialsslowandscatter(散射)light,bouncingitawayfromitsoriginalpath.Othersabsorblight,stoppingitdeadinitstracks.Bothscatteringandabsorptionmakeanobjectlookdifferentfromotherobjectsaroundit,soyoucanseeiteasily.Butatransparentobjectdoesn’tabsorborscatterlight,atleastnotverymuch,Lightcanpassthroughitwithoutbendingorstopping.Thatmeansatransparentobjectdoesn’tlookverydifferentfromthesurroundingairorwater.Youdon’tseeit----youseethethingsbehindit.Tobecometransparent,ananimalneedstokeepitsbodyfromabsorbingorscatteringlight.Livingmaterialscanstoplightbecausetheycontainpigments(色素)thatabsorbspecificcolorsoflight.Butatransparentanimaldoesn’thavep