SectionIII科学小品篇 Passage23 Researchers(研究者)haveannounced(宣布)theresultoftwostudiesonthehealtheffectsofthedrugaspirin(阿斯匹林).Onestudyshowsaspirincansharplyreducethechancethatahealthy,oldermanwillsufferfromaheartattack(心脏病). Thestudyofferedtwonewresultsfromearlierfindings.Itsaidtakingoneaspirinpilleveryotherdayhelpedonlyhealthymenovertheageoffifty.Italsosaidaspiringavethegreatestprotectionagainstheartattackstomenwithlowbloodcholesterol(胆固醇)levels. EarlierintheUnitedStatesbeganamajoraspirinstudyintheearly1980s.Itincluded22,000healthymendoctors.Allwerebetweentheagesoffortyandeighty-four.Morethan11,000ofthedoctorstookaharmlesspillthatcontainednodrug.Themendidnotknowwhichkindofpilltheyweretaking. Thedoctorswhotookaspirinsuffered44%fewerheartattacksthanthosetakingtheharmlesspill.139menwhotookaspirinsufferedfromheartattacks.Tenofthemdied.239menwhodidnottakeaspirinsufferedfromheartattacks.Twenty-sixofthemdied. Theresearcherssaidthedoctors’studyprovidesclearproofthattakingaspirincanpreventafirstheartattackinhealthy,oldermen.Theysaid,however,theresultdoesnotmeaneverymanovertheageoffiftyshouldtakeaspirin.Theysaidaspirincouldn’thelpmenwhodonoteathealthyfoods,whosmokecigarettesandwhoarefat.Theresearcherssaidmenwhothinktheywouldbehelpedbytakingaspirinshouldtalkwiththeirdoctorsfirst. 1.Thepassagetellsusthatthenewuseofaspirinis______. A.totreatheartdisease B.toreducepainwhileonesuffersfromaheartattack C.tohelpoldpeopletobemorehealthy D.toreducethechanceofaheartattackinoldmen 2.Aspirincanhelpthosewho______. AworkasdoctorsB.areunder40yearsold C.arefatandsmokecigarettesD.areolderandhealthy 3.Atlasttheresearchersadvisedustotakeaspirin______. A.withcareB.asmuchaswelike C.everydayD.onlyconsideringtheage 4.Fromtheexperimentwecanconcludethatabout_____ofpeoplewhosufferedfromheartattackswithoutaspirindied. A.7%B.11%C.19%D.44% Passage24 Itseemstobestrangetoyouthereisablindspot(盲点)ontheeyes.Hereisaninterestingexperiment(实验)thatcanmakesomethingdisappear,whenoneeyeisopen. MakeacardaboutthesizeofapostcardandwritetwoEnglishlettersLandRonit,LontheleftandRontheright.First,holdthecardabout80cmawayandyouseeboththeletters.Thencloseyourrighteyeandlookattheletter10\nRonlywithyourlefteye.Andnow,asyoumovethecardslowlytowardsyou,you’llfindtheletterLdisappearing.Butifyoumovethecardnearertoyourface,theletterwillbeseenagain.Nowdothesameexperimentwithyourlefteyeclosed,you’llfindtheletterRdisappearing. Whydoestheletterdisappear?Itisbecausethereisablindspotontheeye.Whentheimage(影像)oftheletterfallsontheblindspot,itwon’tbeseen.Thatiswhyeitherofthelettersdisappears. 1.Thewriterofthepassagethinksthat_____thereisablindspotontheeye. A.fewpeopleknowB.nooneknowsC.mostpeopleknowD.allthepeopleknow 2.Theword“disappear”inthepassagemeans________inChinese. A.驱散B.消散C.消失D.遗失 3.YoufailtoseetheletterLintheexperimentbecause___________. A.youreyesarepoorB.itsimagefallsontheblindspot D.yourlefteyeisnotopenC.youmoveitclosetoyoureye 4.Inwhichorder(顺序)shouldyoudotheexperiment? ①Holdthecard②Movethecardnearer③Closeyourrighteye ④WritetwoEnglishletters⑤LookattheletterR⑥Makeacard A.④⑥①②③⑤B.①③⑥④⑤②C.⑥①④③②⑤D.⑥④①③⑤② 5.Thepassagemainly(主要)tellsus_______. A.howtofindtheblindspotB.aninterestingexperiment C.wheretheblindspotisD.thereisblindspotontheeye Passage25 Differentweathermakespeoplefeeldifferent.Itinfluences(影响)health,intelligence(智力)andfeelings. InAugust,itisveryhotandwetinthesouthernpartoftheUnitedStates.Peopletherehavehearttroubleandotherkindsofhealthproblemsduringthismonth.IntheNortheastandtheMiddleWest,itisveryhotatsometimesandeverycoldatothertimes.PeopleinthesestateshavemorehearttroubleaftertheweatherchangesinFebruaryorMarch. Theweathercanalsoinfluenceintelligence.Forexample,ina1983reportbyscientists,IQ(智商)ofagroupstudentswereveryhighwhenaverystrongwindcame,butafterthestrongwind,theirIQwas10%below.Thewindcanhelppeoplehavemoreintelligence.Veryhotweather,ontheotherhand(另一方面),canmakeitlower.StudentsinmanyschoolsoftheUnitedStatesoftengetworseonexamsinthehotmonthsoftheyear(JulyandAugust). Weatheralsohasastronginfluenceonpeople’sfeelings.Wintermaybeabadtimeforthinpeople.Theyusuallyfeelcoldduringthesemonths.Theymightfeelunhappyduringcoldweather.Butfatpeoplemayhaveahardtimeinhotsummer.Atabout18C,peoplebecomestronger. Lowairpressure(气压)maymakepeopleforgetful.Peopleleavemorebagsonbusesandinshopsonlow-pressuredays.Therearea“goodweather”forwordandhealth.Peoplefeelbestatatemperatureofabout18centigrade(摄氏度). Areyoufeelingsad,tired,forgetful,orunhappytoday?Itmaybetheweather’sproblem.10\n 1.____canhaveabadeffect(作用)onhealth. A.HotandwetweatherB.Goodweather C.WarmweatherD.Highintelligence 2.Peoplemayhavemoreintelligencewhen_____comes. A.arainB.veryhotweather C.astrongwindD.lowairpressure 3.Lowairpressuremaymakepeople_______. A.forgetfulB.sadC.angryD.tired 4.In“goodweather”of18centigrade,_______. A.peopleareveryforgetfulB.peoplecan’tdotheirworkwell C.thinpeoplefeelcoldD.peopleareinbetterhealth 5.Thewriterwantstotellusthat_______. A.hotandcoldweatherinfluencesallpeopleinthesameway B.weatherinfluencespeople’slives C.IQneverchangesduringweatherchanges D.Thereisagoodkindofweatherforpeople’sworkandhealth Passage26 Nowsatellitesarehelpingtoforecast(预报)theweather.Theyareinspace,andtheycanreachanypartoftheworld.Thesatellitestakepicturesoftheatmosphere(大气),becausethisiswheretheweatherforms(形成).Theysendthesepicturestotheweatherstations.Someteorologists(气象学家)canseetheweatherofanypartoftheworld.Fromthepictures,thescientistscanoftensayhowtheweatherwillchange. Today,nearlyfivehundredweatherstationsinsixtycountriesreceivesatellitepictures.Whentheyreceivenewpictures,themeteorologistscomparethemwithearlierones.Perhapstheymayfindthatthecloudshavechangedduringthelastfewhours.Thismaymeanthattheweatheronthegroundmaysoonchange,too.Intheirnextweatherforecast,themeteorologistscansaythis. Sotheweathersatellitesareagreathelptothemeteorologists.Beforesatelliteswereinvented,thescientistscouldforecasttheweatherforabout24or48hours.Nowtheycanmakegoodforecastsforthreeorfivedays.Soon,perhaps,theymaybeabletoforecasttheweatherforaweekormoreahead(提前). 1.Satellitestravel__________. A.inspaceB.abovespaceC.abovethegroundD.intheatmosphere 2.Whydoweusetheweathersatellitestotakepicturesoftheatmosphere？Because_______. A.cloudsformthereB.theweatherformsthere C.theweathersatellitescandoiteasilyD.thepicturescanforecasttheweather 3.Meteorologistsforecasttheweather_______. A.withoutstudyingsatellitepictures B.beforetheyreceivesatellitepictures C.whentheyhavereceivedsatellitepictures D.aftertheyhavecomparedthenewsatellitepictureswiththeearlierones 4.Maybewe'llsoonbeabletoforecasttheweatherfor_________. A.onedayB.twodays C.fivedaysD.sevendaysorevenlonger 5.Themainideaofthispassageisthatsatellitesarenowusedin__________.10\n A.takingpicturesoftheearthB.receivingpicturesoftheatmosphere C.weatherforecastingD.doingotherworkinmanyways Passage27 Paragraph1 Scientistshavelearnedalotaboutthekindsofpeopleneed.Theysaythatthereareseveralkindsoffoodthatpeopleshouldeateveryday,theyare:(1)greenandyellowvegetablesofallkinds;(2)citrus(柑桔)fruitsandtomatoes;(3)potatoesandotherfruitsandvegetables;94)meatofallkinds,fishandeggs;(5)milkandfoodsmadefrommilk;(6)breadorcereal(谷类),riceisalsointhiskindoffood;(7)butter,orsomethinglikebutter. Paragraph2 Peopleindifferentcountriesanddifferentplacesoftheworldeatdifferentkindsofthings.Foodsarecookedandeateninmanydifferentkindsofways.Peopleindifferentcountrieseatatdifferenttimesoftheday.Insomeplacespeopleeatonceortwiceaday;inothercountriespeopleeatthreeorfourtimesaday.Scientistssaythatnoneofthedifferencesisreallyimportant.Itdoesn’tmatterwhetherfoodsareeatenraworcooked,canned(罐装的)orfrozen(冷冻的).Itdoesn’tmatterifapersoneatsdinnerat4o’clockintheafternoonorateleveno’clockatnight.Theimportantthingiswhatyoueateveryday. Paragraph3 Therearetwoproblems,then,infeedingthelargenumberofpeopleontheearth.Thefirstistofindsomewaytofeedtheworld’spopulationsothatnooneishungry.Thesecondistomakesurethatpeopleeverywherehavetherightkindsoffoodtomakethemgrowtobestrongandhealthy. 1.Accordingto(依据)thescientists，whichofthefollowinggroupsoffoodisthehealthiestforyourlunch？ A.Chicken,apples,cerealandcabbages. B.Potatoes,carrots,riceandbread. C.Oranges,bananas,fishandtomatoes. D.Beef,pork,fishandmilk, 2.Itisimportantforpeopletoeat______. A.threetimesaday B.dinnerattwelveo'clock C.cookedfoodallthetime D.somethingfromeachofthesevenkindsoffoodeveryday 3.Peopleindifferentcountriesanddifferentplacesoftheworld____. A.havetherightkindsoffoodtoeatB.cooktheirfoodinthesameway C.havetheirmealsatthesametimeD.eatfoodindifferentways 4.Whichofthefollowingisnottrue？ A.Peopleinsomeplacesdon'thaveenoughtoeat.B.Therearetoomanypeopleintheworld. C.Oneoftheproblemsisthatnooneishungry. D.Thescientistsaretryingtomakepeoplegrowtobestrongandhealthy. 5.IfthereisParagraph(段落)4,whatdoyouthinkisgoingtobetalkedabout？ A.Whenpeopleeattheirlunch. B.Whattodowiththetwoproblems.10\n C.Howtocookfoodindifferentways. D.Whypeopleeatdifferentkindsoffood. Passage28 WhatdoNapoleon,ClintonandWangNanhaveincommon?Theyareallleft-handed. Today,about15%ofthenumberofpeopleisleft-handed.Butwhyarepeopleleft-handed?Theansweristhewaythebrain(大脑)works.Thebrainhastwohalves----therighthalfcontrolstheleftsideofthebody,andtheleftcontrolstherightsideofthebody.Soright-handedpeoplehaveastrongleft-brainandleft-handedpeoplehaveastrongrightbrain. Thetwohalvesofhebrainareaboutthesamesize.Buteachsidecontrolsdifferentthings.Theleftsidecontrolslanguage,mathandlogical(逻辑的).Whenyouremembernewwords,orwhenyouputthingsinorder,youuseyourleftside. Therightsideofthebraincontrolsyourloveofart,colorsandmusic.Itisalsogoodatrecognizing(识别)faces. Thisdoesnotmeanthatallartistsareleft-handedandallaccountants(会计)areright-handed.Someright-handershaveastrongrightbrain,andsomeleft-handershaveastrongleft-brain. 1.Thephrase“incommon”inthefirstsentencemeans______. A.thesameB.differentC.strangeD.interesting 2.Peoplewhoareright-handedorleft-handedaremostlydecidedby______. A.theirparentsB.theirminds C.thewaythebrainworksD.thewaytheheadworks 3.Eachsideofthebrain______. A.likesmusicandmathB.controlsdifferentthingsC.controlsthesamethingD.hastwohalves 4.Whenyouaresinging,youareusingyour_____. A.logicthinkingB.heartC.leftbrainD.rightbrain Passage29 Beforeyouuseyournewmicrowaveoven,readtheinstructionscarefully.Eachovenhasitsowncontrolpanel(控制板),butmostmicrowaveovensoperateinasimilarway.Lookatthecontrolpanelshownhere.Itshowsthetimeatthetopofthepanel.Underthetimearethedifferentfunctions(功能).Youcanpress(按)Defrost,Cook,Clock,orPower.YoucanalsowarmfoodbypressingReheatTimes. Underthefunctionsarethenumbers.Thesenumbersareshownasontelephone,fromzerothroughnine.Youcanpressthenumberstosetthecookingtimeinsecondsorminutes.UnderthenumbersareStartandClear. Amicrowaveovenwillautomatically(自动的)cookonHIGH(powerlevel10)unlessyouenteralowerpowerlevel.Suppose(假设)youwanttocookaservingofbroccolifortwominutesandforty-fivesecondsonMEDIUMpower(level5).First,pressthenumbers2,4and5(twominutes,forty-fiveseconds).ThenpressPower.Next,pressthenumber5.Atlast,pressStarttobegincooking.Ifyoumakeamistake,pressClear.Thiswillclearthedisplayandallowyoutostartoveragain. 阅读短文，然后根据其内容回答下列问题。 1.Whatisthemainideaofthepassage? ______________________________10\n 2.Whatfunctionsdoesamicrowaveovenhave? ______________________________ 3.Howwouldyoucookgreenbeansfortwominutesandthirtysecondsatpowerlevel7? ___________________________________________________________________ 4.Whatisthelastfunctionyoupresseachtimeyousetthecontrols? ______________________________ 5.Whatdoes“Clear”allowyoutodowhenyoupressit? ______________________________ Passage30 Nooneknowswhywesleep,butit’scertainthatweneedto.Peoplewhoarepreventedfromsleepingbegintosufferobviouseffectsafterafewdays—theythinklessclearly,andtheyfallasleepduringtheworkinghours. Therearenorulesaboutsleep.Generallyspeaking,grown-upssleepabout7andahalfhourseachnightandprobablymorethan60percentgetbetweensevenandeighthours.Butperhapseightpercentarequitehappywith5hoursorless,andfourpercentorsofindthattheywanttenhoursormore.Ifyoufeelallright,you’reprobablygettingenoughsleep.Theimportantthingisnottoworryhowmuchotherpeopleget—theirneedsmaybedifferent.Exercisedoesn’tseemtoincreasetheneedforsleep—officeworkers,forexample,sleepforaboutaslongaspeopledoingphysicallyactivework. Childrensleepmorethangrown-ups—perhaps14to18hourssoonafterbirth,goingdowntogrown-uplevelsbyearlyteenage(青少年).Sleeppatternsalsotend(倾向)tobedifferentintheoldpeople,whomaysleeplessatnightthantheydidwhenyounger,findsleepgettingmorebroken,andoftenmakeitaruletosleepduringthedaytime. 1.Somepeoplecan’tthinkclearlybecause_______. A.theyhavebadmemoryB.theyfeelsleepyduringtheworkinghours C.theydon’thaveenoughsleepD.theyarecertaintobekeptfromgoingtobed 2.Whetheryouhavegotenoughsleepisjudged(判断)by_______. A.howmanyhoursyouhavesleptB.howmanyhoursyouneedtosleep C.ifyoudoexerciseandphysicalworkD.ifyoufeelfreshenergetic 3.Accordingtothepassage,aboyof14yearsoldsleeps_____. A.aslonghoursasagrown-up B.muchlongerhoursthanagrown-up C.for14hourseachnight D.forlessthan8hourseachnight 4.WhichofthefollowingisTrue? A.Allgrown-upsmuchhaveatleasteight-hoursleep. B.Mostofgrown-upssleepforsevenoreighthours. C.Quiteafewpeopleneedonly5hoursorlessforthemtosleep. D.Nogrown-upssleepmorethantenhours. Passage31 Somepeoplewanttobesentintospaceaftertheirdeath,otherswanttoliedeepunderthesea.Butmostpeoplewanttogointothefreezer(冷藏库).Thesearebelieversincryogenics(低温冷冻学).10\n Nowsomediseasescan'tbecured,buttheymaybecuredsometimeinthefuture.Sosomepeoplehopethattheirbodiescanbefrozenaftertheydie.Whenacureisfound，warmuphisorherbody,bringitbacktolifeandtakethecure.Oncethebodyisfrozen,itiskeptinliquidnitrogen(液态氮)atatemperatureof328degreesbelowzero. Nowaroundathousandpeoplearegoingtotakecryogenictreatment(处理),thoughmostscientistssayitwon'twork.Ifwefreezehugecreatures(生物)likehumans,everyoneoftheircells(细胞)willbebroken.Cantheybebroughtbacktolifeinthefuture？ 阅读短文，然后根据其内容回答下列问题。 1.Wheredomostpeoplehopethattheirbodiesarekeptaftertheirdeath？ ___________________________________ 2.Whydotheywanttheworldtokeeptheirbodieswell？ 3.Howdoscientistsusuallykeepadeadman'sbody？ 4.Howmanypeoplearegoingtotakecryogenictreatmentaftertheydie？5.Canamanwhodiedofcancercomebacktolifeinthefutureifhisbodyisfrozen？Why？SectionIII科普小品篇答案与解析 Passage23 【答案与解析】本文介绍了科学家对阿斯匹林的研究成果。实验表明，阿斯匹林可以预防或削弱老年人患心脏病的危险，但实际的效果和服用者的饮食有一定的关系。研究人员说，服用可药品要遵医嘱。 1.D。短文首段的末句“…sharplyreducethechancethatahealthy,oldermanwillsufferfromaheartattack.”即是本题答案的出处. 2.D。注意“…reducethechancethatahealthy,oldermanwillsufferfromaheartattack.”本句中的healthy,older这两个词，即可得出答案。 3.A。文章最后一段是说，尽管的这种新用途对病人很有帮助，但患者在使用时必须格外小心，一定要严遵医嘱。 4.B。根据“239menwhodidnottakeaspirinsufferedfromheartattacks.Twenty-sixofthemdied.”一句中的239和26这两个数字即可算出。 Passage24 【答案与解析】这篇科普说明文通过一个简易的小实验，证实了人的眼睛里有一个盲点。当外界物体的影像落在盲点上时，人就看不见该物体了。 1.A。仔细品读文章首句的意思，可知答案只能是A。 2.C。“…Butifyoumovethecardnearertoyourface,theletterwillbeseenagain”，由这几个句子的意思可知字母L在眼睛中消失了。注意消失和消散的区别。 3.B。答案在“Whentheimageoftheletterfallsontheblindspot,itwon’tbeseen.”中。 4.D。根据第二段的意思可知，此实验的顺序是：先制作一张卡片—在上面写上两个字母—拿起卡片—闭上右眼—看到字母R—让卡片离眼睛再近些。故答案是D。 5.D。通篇考虑短文，可知D为最佳答案。这由文首一句及“…Itisbecausethereisablindspotontheeye.”也可得出。 Passage25 【答案与解析】这篇短文告诉我们的是：天气的冷热干湿对人体健康有很大的影响。比如心脏病高发区所在地往往是严寒或酷热。大风或炎热天气里，人的智商会降低。瘦人怕冷天，而炎炎夏日对胖人又不利。此外，低气压还能导致健忘。 1.A。根据文章第二自然段的描述可知，冷湿天气对人的健康是有害的。10\n 2.C。第三段的首句“Theweathercanalsoinfluenceintelligence”说的就是这个意思。 3.A。本题属表层理解题。答案就在“Lowairpressuremaymakepeopleforgetful.”中。 4.D。由“Peoplefeelbestatatemperatureofabout18centigrade.”一句可知。 5.B。根据文章最后的“Areyoufeelingsad,tired,forgetful,orunhappytoday?Itmaybethe weather’sproblem.”这一句，我们可以推测出作者的写作意图。 Passage26 【答案与解析】这篇阅读材料向我们介绍了气象卫星在预报天气中所发挥的重要作用。如今，许多国家的气象站都是在接收到卫星云图后，由气象学家进行研究分析，然后预报天气的。在卫星的帮助下，人们可以预测未来三五天或更长时间内的天气状况。 1.A。本题属表层理解题。短文首句即是答案之所在。 2.D。“Fromthepictures，thescientistscanoftensayhowtheweatherwillchange.”是该小题答案的出处。 3.D。答案就在“themeteorologistscomparethemwithearlierones.Perhapstheymayfindthatthecloudshavechangedduringthelastfewhours.Thismaymeanthattheweatheronthegroundmaysoonchange,too.”中。 4.D。文章结尾的“Soon,perhaps,theymaybeabletoforecasttheweatherforaweekormoreahead.”这句即是答案之所在。 5.C。短文首句即点明了主旨。 Passage27 【答案与解析】这篇短文分为三个落：第一段列举了科学家研究了人们每天要吃的食物；第二段讲述了不同国家的人们饮食习惯和饮食结构等各方面有很大差异。但这些对人来说都没不是很重要的，重要的是每天吃什么。第三段阐述了两个问题：如何解决世界人口的吃饭问题，既要吃饱，又要吃得健康。 1.A。本题属表层理解题。由第一段科学家建议七大类食品可知答案非A莫属。 2.D。由“Theimportantthingiswhatyoueateveryday.”及第一段的内容可知D是正确答案。而根据第二段可知A、B、C皆为错误的。 3.D。第二段开头的“Peopleindifferentcountriesanddifferentplacesoftheworldeatdifferentkindsofthings.Foodsarecookedandeateninmanydifferentkindsofways.”这两句是解答本题的关键。 4.C。根据第三段所讲的内容，C项显然是错误的。 5.B。A、C和D都是在上文刚刚谈论过的，又根据第三段“Therearetwoproblems,then,infeedingthelargenumberofpeopleontheearth.”所提的两个问题，可以推知下文可能要谈论 如何解决这两个问题。故答案为B。 Passage28 【答案与解析】该短文的大意是：百分之十五的人习惯于使用左手进行工作。这是因为大脑的工作方式造成的。人的两个大脑半球大小相差无几，但各有分工。左半球掌管语言、数学和逻辑等；右半球则控制艺术、颜色和音乐等。惯用左手的人，他们的大脑左半球相比右脑更发达些。不过这也不是绝对的。 1.A。本小题有一定的难度，但考虑到短文首句的后的“Theyareallleft-handed”一句还是可以推测出来正确答案的。 2.C。“Theansweristhewaythebrainworks.”，本句是解答该题的关键。 3.B。第三段是本题答案之所在。10\n 4.D。“唱歌”属于艺术类，根据“Therightsideofthebraincontrolsyourloveofart,colorsand music.”这句话，显然可知答案为D。 Passage29 【答案与解析】这篇科学说明文浅显的文字，介绍了微波炉的构造并详细讲述了它的操作使用方法。 1.Ittellsushowtouseanewmicrowaveoven。由文首的“Beforeyouuseyournewmicrowaveoven,readtheinstructionscarefully”，可以得到本文的主旨是“讲述微波炉的使用方法”。2.Defrost,cookorwarmfood。短文末句的“Underthetimearethedifferentfunctions(功能).Youcanpress(按)Defrost,Cook,Clock,orPower.YoucanalsowarmfoodbypressingReheatTimes.”这句话是答案的出处。 3.First,pressthenumber2,3,and0.ThenpressPower.Nextpressthenumber7.FinallypressStarttobegincooking.由短文中的“Suppose(假设)youwanttocookaservingofbroccolifortwominutesandforty-fivesecondsonMEDIUMpower(level5).First,pressthenumbers2,4and5(twominutes,forty-fiveseconds).ThenpressPower.Next,pressthenumber5.”可以知道若是需要两分钟四十秒的时间来做菜的话，则是这样来操作。由此可知要是做豆角的话，需要用时两分钟三十秒，则应按2，3，0这三个钮。再根据前面的说明，可不难找到答案。 4.Start.由“UnderthenumbersareandClear.”和“Atlast,pressStarttobegincooking.”可知这是答案的出处。 5.Itwillclearthedisplayandallowyoutostartoveragain.这是文章最后讲的一层意思，答案即在“Ifyoumakeamistake,pressClear.Thiswillclearthedisplayandallowyoutostartoveragain.”一句中。 Passage30 【答案与解析】睡觉要占去人一生三分之一左右的时间。人为什么要睡觉？这个问题一直使人们，包括科学家在内，都困惑不解。本文向读者介绍了不同年龄层次的人们，睡眠的需求也不尽相同。 1.C.A、B两个答案是睡眠的结果而不是导致人们思维不清的主要原因，故不能选，D也不能说明原因。由第二段我们知道，睡眠不足是引起人们思维混乱的根本原因。 2.B.短文的第二段有交待：60%以上的成年人大约睡7-8小时。 3.D.判断人们是否得到足够的睡眠不是根据睡眠时间的长短而是人们是否精神焕发地去从事一天的工作与学习。 4.A.14岁的孩子属于earlyteenage.他们的睡眠时间与成年人相同。故答案为A。 Passage31 【答案与解析】这篇小品文的意思是：有很多人希望死后被送进冷藏库，将尸体保存在零下320度的液态氮中。等将来医疗条件允许，可以治愈时，再解冻，接受治疗，就可以死回生了。尽管科学家们对此想法表示怀疑，仍有一千多人打算接受低温处理。 1.Inthefreezer.答案就在“Butmostpeoplewanttogointothefreezer.”这句话中。但要注意most一词方能正确解答。 2.Theyhopethattheycancomebacktolifeoneday.“…Whenacureisfound,warmuphisorherbody，bringitbacktolifeandtakethecure.”是答题的依据。 3.Theyusuallykeepitinliquidnitrogenatatemperatureof328degreesbelowzero.显然，答案出自“Oncethebodyisfrozen,itiskeptinliquidnitrogen(液态氮)atatemperatureof328degreesbelowzero.”这句话中。 4.Around1000people.本题属表层理解题。由“Nowaroundathousandpeoplearegoingtotakecryogenictreatment(处理)，thoughmostscientistssayitwon'twork.”可知，10\n 5.No，hecan't.“…Becauseeveryoneofhiscellswillbebroken.”“…itwon'twork.Ifwefreezehugecreatures(生物)likehumans,everyoneoftheircells(细胞)willbebroken.”是答案的出处。10
