1专题二阅读理解——决定成败科普常识类(2013·浙江,B)Belowisaselectionfromapopularsciencebook.Ifbloodisred,whyareveins(静脉)blue?Actually,veinsarenotblueatall.Theyaremoreofaclear,yellowishcolour.Althoughbloodlooksredwhenit'soutsidethebody,whenit'ssittinginaveinnearthesurfaceoftheskin,it'smoreofadarkreddishpurplecolour.Attherightdepth,thesebloodfilledveinsreflectlessredlightthanthesurroundingskin,makingthemlookbluebycomparison.Whichworksharder,yourheartoryourbrain?Thatkindofdependsonwhetheryou'rebusythinkingorbusyexercising.Yourheartworksuptothreetimesharderduringexercise,andshiftsenoughbloodoveralifetimetofillasupertanker.But,inthelongrun,yourbrainprobablytipsit,becauseevenwhenyou'resittingstillyourbrainisusingtwiceasmuchenergyasyourheart,andittakesfourtofivetimesasmuchbloodtofeedit.Whydoteethfallout,andwhydon'ttheygrowbackingrownups?Baby(or“milk”)teethdonotlastlong;theyfallouttomakeroomforbigger,strongeradultteethlateron.Adultteethfalloutwhentheybecomedamaged,decayedandinfectedbybacteria.Oncethissecondsetofteethhasgrownin,you'redone.Whenthey'regone,they'regone.Thisisbecausenaturefiguresyou'resetforlife,andwhatcontrolsregrowthofyourteethswitchesoff.Dooldpeopleshrinkastheyage?Yesandno.Manypeopledogetshorterastheyage.But,whentheydo,itisn'tbecausethey'reshrinkingallover.Theysimplyloseheightastheirspine(脊柱)becomesshorterandmorecurvedduetodisuseandtheeffectsofgravity(重力).Many(butnotall)menandwomendoloseheightastheygetolder.Menloseanaverageof34cminheightastheyage,whilewomenmaylose5cmormore.Ifyoulivetobe200yearsold,wouldyoukeepshrinkingtillyouwere,like602cmtall,likealittleboyagain?No,becauseoldpeopledon'treallyshrink!Itisnotthattheyaregrowingbackwards—theirlegs,armsandbackbonesgettingshorter.Whentheydogetshorter,it'sbecausethespinehasshortenedalittle.Or,moreoften,becomemorebentandcurved.Whydoesspinningmakeyoudizzy(眩晕的)?Becauseyourbraingetsconfusedbetweenwhatyou'reseeingandwhatyou'refeeling.Thebrainsensesthatyou'respinningusingspecialgravityandmotionsensingorgansinyourinnerear,whichworktogetherwithyoureyestokeepyourvisionandbalancestable.But,whenyousuddenlystopspinningthesystemgoesoutofcontrol,andyourbrainthinksyou'removingwhileyou'renot!Wheredofeelingsandemotionscomefrom?Mostlyfromanancientpartofthebraincalledthelimbicsystem.Allmammalshavethisbrainarea—frommicetodogs,cats,andhumans.Soallmammalsfeelbasicemotionslikefear,painandpleasure.Butsincehumanfeelingsalsoinvolveother,newerbitsofthebrain,wefeelmorecomplexemotionsthananyotheranimalontheplanet.Ifexercisewearsyouout,howcanitbegoodforyou?Becauseourbodiesadapttoeverythingwedotothem.Andasfarasyourbodyisconcerned,it's“useit,orloseit”!It'snotthatexercisemakesyouhealthy;it'smorethatalackofexerciseleavesyourbodyweakandeasilyaffectedbydisease.1.Whatisthecolourofbloodinaveinnearthesurfaceoftheskin?A.Blue.B.Lightyellow.C.Red.D.Darkreddishpurple.解析细节理解题。根据第一个标题下的“...it'smoreofadarkreddishpurplecolour.”可知答案。答案D2.Whydosomeoldpeoplelookalittleshrunkenastheyage?A.Becausetheirspineisinactiveuse.B.Becausetheyaremoreeasilyaffectedbygravity.C.Becausetheykeepgrowingbackwards.D.Becausetheirspinebecomesmorebent.解析细节理解题。根据第四个标题下的“Theysimplyloseheightastheirspine(脊3柱)becomesshorterandmorecurvedduetodisuseandtheeffectsofgravity(重力).”可知,老年人变矮是因为脊柱收缩和弯曲造成的。答案D3.Whichofthefollowingstatementsaboutourbrainistrue?A.Inthelongrun,ourbrainprobablyworksharderthanourheart.B.Whenourbrainsensesthespinning,wewillfeeldizzy.C.Thebrainsoftheothermammalsareascomplexasthoseofhumans.D.Ourfeelingsandemotionscomefromthemostdevelopedareainourbrain.解析细节理解题。根据第二个标题下的第三句“But,inthelongrun,yourbrain...”可知答案为A项。此题最易误选B项,根据第五个标题下的最后一句可知,眩晕是由于“你已经不动了,而你的大脑认为你还在动”的错觉引起的。答案A4.Whatisthemainpurposeoftheselection?A.Togiveadviceonhowtostayhealthy.B.Toprovideinformationaboutourbody.C.Tochallengenewfindingsinmedicalresearch.D.Toreportthelatestdiscoveriesinmedicalscience.解析写作意图题。考生易误选D项,但是在医学领域,概括失误。文章主要涉及我们身体的问题,包括身体的、情绪的等等。故选择B项较全面。答案B社会现象类(2013·湖北,D)AGermanstudysuggeststhatpeoplewhoweretoooptimisticabouttheirfutureactuallyfacedgreaterriskofdisabilityordeathwithin10yearsthanthosepessimistswhoexpectedtheirfuturetobeworse.Thepaper,publishedthisMarchinPsychologyandAging,examinedhealthandwelfaresurveysfromroughly40,000Germansbetweenages18and96.Thesurveyswereconductedeveryyearfrom1993to2003.Surveyrespondents(受访者)wereaskedtoestimatetheirpresentandfuturelifesatisfactiononascaleof0to10,amongotherquestions.Theresearchersfoundthatyoungadults(age18to39)routinelyoverestimatedtheirfuturelifesatisfaction,whilemiddleagedadults(age40to64)moreaccuratelypredictedhowtheywouldfeelinthefuture.Adultsof65andolder,however,werefarmorelikelytounderestimatetheirfuturelifesatisfaction.Notonlydidtheyfeelmoresatisfiedthantheythoughttheywould,4theolderpessimistsseemedtosufferalowerratio(比率)ofdisabilityanddeathforthestudyperiod.“Weobservedthatbeingtoooptimisticinpredictingabetterfuturethanactuallyobservedwasassociatedwithagreaterriskofdisabilityandagreaterriskofdeathwithinthefollowingdecade,”wroteFriederR.Lang,aprofessorattheUniversityofErlangenNuremberg.Langandhiscolleagu