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第二篇 Living with Computer After too long on the Net, even a phone call can be a shock. My boyfr...
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{{*HTML*}}? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳标题2第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项 NaturalGas??1．Naturalgas isproducedfromreservoirsdeepbeneaththeearth’ssurface．Itisafossil fuel矿物燃料meaningthatitisderivedfromorganicmaterialburiedintheearth millionsofyearsago．Themaincomponentofnaturalgasismethane甲烷．? ?2．Thepopularityanduseofcleannaturalgashasincreaseddramatically overthepast50yearsaspipelineinfrastructure基础设hasbeeninstalledto deliveritconvenientlyandeconomicallytomillionsofresidentialcommercial andindustrialcustomersworldwide．Todaynaturalgasserviceisavailableinall 50statesintheU．S．andistheleadingenergychoiceforfuelingAmerican homesandindustries．Morethan65millionAmericanhomesusenaturalgas．In factnaturalgasisthemosteconomicalsourceforhomeenergyneedscosting one-thirdasmuchaselectricity．Inadditiontoheatinghomesmuchofthegas usedintheUnitedStatesisusedasarawmaterialtomanufactureawide varietyofproductsfrompainttofibersforclothingtoplasticsfor healthcarecomputingandfurnishings．Naturalgasisalsousedinasignificant numberofnewelectricity-generatingpowerplants．??3．Naturalgasis oneofthesafestandcleanestfuelsavailable．Itemits发出lesspollutionthan otherfossilfuelsources．Whennaturalgasisburneditproducesmostlycarbon dioxide二氧化碳andwatervapor-thesamesubstancesemittedwhenhumans breathe．Comparedwithsomeotherfossilfuelsnaturalgasemitstheleastamount ofcarbondioxideintotheairwhencombusted燃烧-makingnaturalgasthe cleanestburningfossilfuelofall．??4．TheUnitedStatesconsumes aboutone-thirdoftheworld’snaturalgasoutputmakingitthelargest gas-consumingregionintheworld．TheU．S．DepartmentofEnergy’sEnergy InformationAdministrationforecaststhatnaturalgasdemandwillgrowbymore than50percentby2025．??5．Therearehugereservesofnaturalgas beneaththeearth’ssurface．Thelargestreservesofnaturalgascanbefoundin RussiaWestandNorthAfricaandtheMiddleEast．LNG液化天然气hasbeenproduced domesticallyandimportedintheUnitedStatesformorethanfourdecades TodaytheleadingimportersofLNGareJapanKoreaFranceandSpain．? ? A．Cleanfuelofchoice?? B．Naturalgasprices?? C．Naturalgasconsumption?? D．Popularityanduseofnaturalgas?? E．Disadvantagesofnaturalgas??F．Naturalgasreservesand supplyParagraph5______
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{{*HTML*}} A．overthepast50years?? B．beneaththeearth’ssurface?? C．bymorethan50percent?? D．formorethanfourdecades?? E．asarawmaterial??F．forhomeenergy needsItisestimatedthatby2025thenaturalgasdemandintheUnitedStateswillincrease______．
{{*HTML*}}{{B}}第二篇{{/B}} NightoftheLivingAnts? ?Whenanantdiesotherantsmovethedeadinsectoutofthenest．This behaviorisinterestingtoscientistswhowonderhowantsknowforsure-andso soon-thatanotherantisdead．??Dong-HwanChoeascientistat theUniversityofCaliforniafoundthatArgentineantshaveachemicalonthe outsideoftheirbodiesthatsignalstootherantsI’mdead-takemeaway． ??Butthere’satwisttoChoe’sdiscovery．Choesaysthatthe livingants-notjustthedeadones-havethisdeathchemical．Inother wordswhileanantcrawlsaroundperhapsinapicnicorhomeit’stellingother antsthatit’sdead．??Whatkeepsantsfromhaulingawaythe livingdead?ChoefoundthatArgentineantshavetwoadditionalchemicalson theirbodiesandthesetellnearbyantssomethinglikeWait-I’mnotdeadyet． SoChoe’sresearchturneduptwosetsofchemicalsignalsinantsonesaysI’m deadtheothersetsaysI’mnotdeadyet．??Otherscientists havetriedtofigureouthowantsknowwhenanotherantisdead．Ifanantis knockedunconsciousotherantsleaveitaloneuntilitwakesup．Thatmeansants knowthatunmovingantscanstillbealive．??Choesuspectsthat whenanArgentineantdies．thechemicalthatsaysWait-I’mnotdeadyetquickly goesaway．OncethatchemicalisgoneonlytheonethatsaysI’mdeadis left．It’sbecausethedeadantnolongersmellslikealivingantthatitgets carriedtothegraveyard墓地notbecauseitsbodyreleasesnewuniquechemicals afterdeathsaidChoe．Whenotherantsdetectthedeadchemicalwithoutthenot deadyetchemicaltheyhaulawaythebody．ThiswasChoe’shypothesis假设． ??TotesthishypothesisChoeandhisteamputdifferent chemicalsonArgentineantpupae蛹．WhenthescientistsusedtheI’m deadchemicalotherantsquicklyhauledthetreatedpupaeaway．Whenthe scientistsusedtheWait-I’mnotdeadyetchemicalotherantsleftthetreated pupaealone．Choebelievesthisbehaviorshowsthatthenotdeadyetchemical overrides优胜于thedeadchemicalwhenpickedupbyadultants．Andthatwhenan antdiesthenotdeadyetchemicalfadesaway．Othernearbyantsthendetectthe remainingdeadchemicalandremovethebodyfromthenest． Thephrasethisdeathchemicalinparagraph3refersto
{{*HTML*}}? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳标题2第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项 NaturalGas??1．Naturalgas isproducedfromreservoirsdeepbeneaththeearth’ssurface．Itisafossil fuel矿物燃料meaningthatitisderivedfromorganicmaterialburiedintheearth millionsofyearsago．Themaincomponentofnaturalgasismethane甲烷．? ?2．Thepopularityanduseofcleannaturalgashasincreaseddramatically overthepast50yearsaspipelineinfrastructure基础设hasbeeninstalledto deliveritconvenientlyandeconomicallytomillionsofresidentialcommercial andindustrialcustomersworldwide．Todaynaturalgasserviceisavailableinall 50statesintheU．S．andistheleadingenergychoiceforfuelingAmerican homesandindustries．Morethan65millionAmericanhomesusenaturalgas．In factnaturalgasisthemosteconomicalsourceforhomeenergyneedscosting one-thirdasmuchaselectricity．Inadditiontoheatinghomesmuchofthegas usedintheUnitedStatesisusedasarawmaterialtomanufactureawide varietyofproductsfrompainttofibersforclothingtoplasticsfor healthcarecomputingandfurnishings．Naturalgasisalsousedinasignificant numberofnewelectricity-generatingpowerplants．??3．Naturalgasis oneofthesafestandcleanestfuelsavailable．Itemits发出lesspollutionthan otherfossilfuelsources．Whennaturalgasisburneditproducesmostlycarbon dioxide二氧化碳andwatervapor-thesamesubstancesemittedwhenhumans breathe．Comparedwithsomeotherfossilfuelsnaturalgasemitstheleastamount ofcarbondioxideintotheairwhencombusted燃烧-makingnaturalgasthe cleanestburningfossilfuelofall．??4．TheUnitedStatesconsumes aboutone-thirdoftheworld’snaturalgasoutputmakingitthelargest gas-consumingregionintheworld．TheU．S．DepartmentofEnergy’sEnergy InformationAdministrationforecaststhatnaturalgasdemandwillgrowbymore than50percentby2025．??5．Therearehugereservesofnaturalgas beneaththeearth’ssurface．Thelargestreservesofnaturalgascanbefoundin RussiaWestandNorthAfricaandtheMiddleEast．LNG液化天然气hasbeenproduced domesticallyandimportedintheUnitedStatesformorethanfourdecades TodaytheleadingimportersofLNGareJapanKoreaFranceandSpain．? ? A．Cleanfuelofchoice?? B．Naturalgasprices?? C．Naturalgasconsumption?? D．Popularityanduseofnaturalgas?? E．Disadvantagesofnaturalgas??F．Naturalgasreservesand supplyParagraph3______
{{*HTML*}}? 下面的短文后列出了7个句子请根据短文的内容对每个句子做出判断如果该句提供的是正确信息请选择A如果该句提供的是错误信息请选择B如果该句的信息文中没有提及请选择C ?? AGreatQuakeComing?? ?EveryonewholivesinSanFranciscoknowsthatearthquakesarecommonin theBayArea--andtheycanbedevastating．In1906forexampleamajorquake destroyedabout28000buildingsandkilledhundredsperhapsthousandsof people．ResidentsnowwonderwhenthenextBigOnewillstrike．It’sboundto happensomeday．Atleastsevenactivefault断层linesrunthroughtheSan Franciscoarea．FaultsareplaceswherepiecesofEarth’scrust地壳slidepast eachother．Whenthesepiecesslipthegroundshakes．??Toprepare forthatdayscientistsareusingnewtechniquestoreanalyzethe1906 earthquakeandpredicthowbadthedamagemightbewhenthenextonehappens． ??Onenewfindingaboutthe1906quakeisthattheSanAndreas faultsplitapartfasterthanscientistshadassumedatthetime．Duringsmall earthquakesfaultsrupture断裂atabout2.7kilometerspersecond．Duringbigger quakeshowever．rupturescanhappenatratesfasterthan3.5kilometersper second．??Atsuchhighspeedsmassiveamountsofpressurebuild upgeneratingundergroundwavesthatcancausemoredamagethanthequake itself．LuckyforSanFranciscothesepressurepulses脉冲traveledawayfromthe cityduringthe1906event．Asbadasthedamagewasitcouldhavebeenfar worse．??Lookingahead．scientistsaretryingtopredictwhenthe nextmajorquakewilloccur．Recordsshowthatearthquakeswerecommonbefore 1906．Sincethentheareahasbeenrelativelyquiet．Patternsinthe datahoweversuggestthattheprobabilityofamajorearthquakestrikingtheBay Areabefore2032isatleast62percent．??NewbuildingsinSan Franciscoarequitesafeincaseoffuturequakes．Stillmorethan84percentof thecity’sbuildingsareoldandweak．Analysessuggestthatanothermassive earthquakewouldcauseextensivedamage．??Peoplewholivethere todaytendtofeelsafebecauseSanFranciscohasremainedprettyquietfora while．Accordingtothenewresearchhowever．it’snotamatterofiftheBigOne willhit．It’sjustamatterofwhen．SanFranciscoisfullypreparedforanotherbigearthquake．
{{*HTML*}}下面的短文有15处空白请根据短文内容为每处空白确定1个最佳选项 TheCaseoftheDisappearing Fingerprints??Oneusefulanti-cancerdrugcan effectivelyerasethewhorls萝状指纹andothercharacteristicmarksthatgive peopletheirdistinctivefingerprints．Losingthemcouldbecometroublesome．A case{{U}}?51?{{/U}}onlineinaletterbyAnnalsofOncologyindicates howbiga{{U}}?52?{{/U}}losingfingerprintsis．? ?Eng-HuatTanaSingapore-basedmedicaldoctordescribesa62-year-oldman whohasusedcapecitabine卡培他滨to{{U}}?53?{{/U}}hisnasopharyngeal cancer鼻咽症．Afterthreeyearsonthe{{U}}?54?{{/U}}thepatient decidedtovisithisU．S．relativeslastDecember．ButhewasstoppedbyU．S． customsofficials{{U}}?55?{{/U}}4hoursafterenteringthecountry whenthoseofficialscouldn’tgetfingerprintsfromtheman．Therewereno{{U}} ?56?{{/U}}swirly旋涡状的marksappearingfromhisindexfinger． ??U．S．customshasbeenfingerprintingincomingforeignvisitors foryearsTansays．UnfortunatelyfortheSingaporeantraveleronepotential{{U}} ?57?{{/U}}effectofhisdrugtreatmentisasmoothingofthetissue onthefingerpads．{{U}}?58?{{/U}}nofingerprints．?Itis uncertainwhenfingerprint{{U}}?59?{{/U}}willbegintotakeplacein patientswhoaretakingcapecitabineTanpointsout．Sohe{{U}}?60 ?{{/U}}anyphysicianswhoprescribethedrugtoprovidetheirpatientswitha doctor’s{{U}}?61?{{/U}}pointingOutthattheirmedicinemaycause fingerprintstodisappear．??EventuallytheSingaporeantraveler madeitintotheUnitedStates．Buthe’salsonowgottheexplanatorydoctor’s note-andwon’tleavehome{{U}}?62?{{/U}}it．??Bythe waymaybetheFoodandDrugAdministration{{U}}?63?{{/U}}approveduse ofthedrug11yearsagoshouldconsiderupdatingitslistofsideeffects{{U}} ?64?{{/U}}withthismedicine．Thecurrentlistdoesnotethatpatients mayexperiencevomiting呕吐stomachpainandsomeothersideeffects．Butno where{{U}}?65?{{/U}}itmentionthepotentialforlossoffingerprints．
{{*HTML*}}下面的短文有15处空白请根据短文内容为每处空白确定1个最佳选项 TheCaseoftheDisappearing Fingerprints??Oneusefulanti-cancerdrugcan effectivelyerasethewhorls萝状指纹andothercharacteristicmarksthatgive peopletheirdistinctivefingerprints．Losingthemcouldbecometroublesome．A case{{U}}?51?{{/U}}onlineinaletterbyAnnalsofOncologyindicates howbiga{{U}}?52?{{/U}}losingfingerprintsis．? ?Eng-HuatTanaSingapore-basedmedicaldoctordescribesa62-year-oldman whohasusedcapecitabine卡培他滨to{{U}}?53?{{/U}}hisnasopharyngeal cancer鼻咽症．Afterthreeyearsonthe{{U}}?54?{{/U}}thepatient decidedtovisithisU．S．relativeslastDecember．ButhewasstoppedbyU．S． customsofficials{{U}}?55?{{/U}}4hoursafterenteringthecountry whenthoseofficialscouldn’tgetfingerprintsfromtheman．Therewereno{{U}} ?56?{{/U}}swirly旋涡状的marksappearingfromhisindexfinger． ??U．S．customshasbeenfingerprintingincomingforeignvisitors foryearsTansays．UnfortunatelyfortheSingaporeantraveleronepotential{{U}} ?57?{{/U}}effectofhisdrugtreatmentisasmoothingofthetissue onthefingerpads．{{U}}?58?{{/U}}nofingerprints．?Itis uncertainwhenfingerprint{{U}}?59?{{/U}}willbegintotakeplacein patientswhoaretakingcapecitabineTanpointsout．Sohe{{U}}?60 ?{{/U}}anyphysicianswhoprescribethedrugtoprovidetheirpatientswitha doctor’s{{U}}?61?{{/U}}pointingOutthattheirmedicinemaycause fingerprintstodisappear．??EventuallytheSingaporeantraveler madeitintotheUnitedStates．Buthe’salsonowgottheexplanatorydoctor’s note-andwon’tleavehome{{U}}?62?{{/U}}it．??Bythe waymaybetheFoodandDrugAdministration{{U}}?63?{{/U}}approveduse ofthedrug11yearsagoshouldconsiderupdatingitslistofsideeffects{{U}} ?64?{{/U}}withthismedicine．Thecurrentlistdoesnotethatpatients mayexperiencevomiting呕吐stomachpainandsomeothersideeffects．Butno where{{U}}?65?{{/U}}itmentionthepotentialforlossoffingerprints．
{{*HTML*}}{{B}}第三篇{{/B}} TheIceman??Ona Septemberdayin1991twoGermanswereclimbingthemountainsbetweenAustria andItaly．Highuponamountainpasstheyfoundthebodyofamanlyingonthe ice．Atthatheight10499feetor3200meterstheiceisusually permanentbut1991hadbeenanespeciallywarmyear．Themountainicehadmelted morethanusualandsothebodyhadcometothesurface．??Itwas lyingfacedownward．Theskeleton骨架wasinperfectconditionexceptforawound inthehead．Therewasstillskinonthebonesandtheremainsofsome clothes．Thehandswerestillholdingthewoodenhandleofanaxandonthefeet therewereverysimpleleatherandclothboots．Nearbywasapairofglovesmade oftreebark树皮andaholderforarrows．??Whowasthisman?How andwhenhadhedied?Everybodyhadadifferentanswertothesequestions．Some peoplethoughtthatitwasfromthiscenturyperhapsthebodyofasoldierwho diedinWorldWarIsinceseveralsoldiershadalreadybeenfoundinthearea．A Swisswomanbelieveditmightbeherfatherwhohaddiedinthosemountains twentyyearsbeforeandwhosebodyhadneverbeenfound．Thescientistswho rushedtolookatthebodythoughtitwasprobablymucholdermaybeevena thousandyearsold．??Withmoderndatingtechniquesthe scientistssoonlearnedthattheIcemanwasabout5300yearsold．Borninabout 3300B．C．helivedduringtheBronzeAgeinEurope．Atfirstscientiststhought hewasprobablyahunterwhohaddiedfromanaccidentinthehigh mountains．Morerecentevidencehowevertellsadifferentstory．Anewkindof X-rayshowsanarrowheadstillstuckinhisshoulder．Itleftonlyatinyholein hisskinbutitcausedinternaldamageandbleeding．Healmostcertainlydied fromthiswoundandnotfromthewoundonthebackofhishead．Thismeansthat hewasprobablyinsortiekindofabattle．Itmayhavebeenpartofalarger warorhemayhavebeenfightingbandits．Hemayevenhavebeenabandithimself． ??Bystudyinghisclothesandtoolsscientistshavealready learnedagreatdealfromtheIcemanaboutthetimeshelivedin．Wemaynever knowthefullstoryofhowhediedbuthehasgivenusimportantcluestothe historyofthosedistanttimes．ThescientistsmadethedeductionthattheIceman
{{*HTML*}}下面有3篇短文每篇短文后有5道题请根据短文内容为每题确定1个最佳选项{{B}}第一篇{{/B}} WalkingtoExercisetheBrain? ?Doyouthinksittingandstudyingallthetimewillimprove students’grades?Thinkagain．Gettingsomeexercisemayhelptoo．? ?Newresearchwitholderpeoplesuggeststhattakingregularwalkshelps thempayattentionbetterthaniftheydidn’texercise．? ?Previousresearchhadshownthatmicelearnrememberandpayattention betterafterafewweeksofworkingoutonarunningwheel．Micethatexercise havegreaterbloodflowtothebrainthanthosewhodon’t．Theirbraincellsalso makemoreconnections．??Neuroscientists神经科学家fromthe UniversityofIllinoisatUrbana-Champaignwantedtofindoutifthesamething istrueforpeople．Firsttheymeasuredthephysicalfitnessof41adultsages58 to77aftereachpersonwalked1mile．Thenparticipantslookedatarrowsona computerscreenandhadtousecomputerkeystoshowwhichwayoneparticular arrowwaspointing．??Adultswhowerephysicallyfitwerefaster atthearrowtaskandtheiranswerswerejustasaccurateastheirless-fit peerstheresearchersfound．Thefitterparticipantsalsohadmorebloodflowto apartoftheirbrainresponsibleforpayingattentionandmakingdecisions． ??Inasecondstudy15elderlypeoplewhocompleteda6-month aerobic-training有氧运动coursewerefasteratattentiontaskscomparedwith14 seniorswhojustdidstretchingandtoning韵律操exercisesforthesameamountof time．??Soevengoingforawalkevery2or3daysforjust10to 45minutescanhelp．Thatshouldbegoodnewsfortheelderly．? ?Theeffectsofexercisingonthebrainsofyoungerpeoplehaven’tbeen studiedyet．Stillitcan’thurttotakeoccasionalbreaksandgoforawalkor runaroundwithfriends．Whateveryoudothoughdon’ttrytoreadandwalkatthe sametime．Youcouldenduphurtingyourself!Itcanbegoodforhealthwhenonetakesawalkevery2or3daysforatleast
AnIntelligentCar Drivingneedssharpeyeskeenearsquickbrainandcoordination协调betweenhandsandthebrain.Manyhumandrivershaveall51andcancontrolafast-movingcar.Buthowdoesanintelligentcarcontrolitself? Thereisavirtual虚拟的driverinthesmartcar.Thisvirtualdriverhaseyesbrainshandsandfeettoo.Theminicameras52eachsideofthecararehiseyeswhich53theroadconditionsaheadofit.Theywatchthe54tothecar’sleftandright.Thereisalsoahighlyautomaticdriving55inthecar.Itisthebuilt-incomputerwhichisthevirtualdriver’sbrain.Hisbrain56thespeedsofothermovingcarsnearitandanalyzestheirpositions.Basingonthisinformationitchoosesthe57pathfortheintelligentcarandgivesinstructionstothehandsandfeettoactaccordingly.Inthiswaythevirtualdriver58hiscar. Whatisthevirtualdriver’sbestadvantage?Hereacts59.Theminicamerasarebringing60continuouslytothebrain.Itcompletestheprocessingoftheimageswithin100milliseconds.61theworld’sbestdriverneedsatleastonesecondtoreact.Besideswhenhetakes62heneedsonemoresecond. Thevirtualdriverisreallywonderful.Hecanreducetheaccident63considerablyonexpressways高速公路.Inthis64canwelethimhavethewheelatanytimeandinanyplace?Experts65thatwecannotdothatjustyet.Hisabilitytorecognizethingsisstilllimited.Hecannowonlydriveanintelligentcaronexpressways.
{{*HTML*}}下面的短文有15处空白请根据短文内容为每处空白确定1个最佳选项 TheCaseoftheDisappearing Fingerprints??Oneusefulanti-cancerdrugcan effectivelyerasethewhorls萝状指纹andothercharacteristicmarksthatgive peopletheirdistinctivefingerprints．Losingthemcouldbecometroublesome．A case{{U}}?51?{{/U}}onlineinaletterbyAnnalsofOncologyindicates howbiga{{U}}?52?{{/U}}losingfingerprintsis．? ?Eng-HuatTanaSingapore-basedmedicaldoctordescribesa62-year-oldman whohasusedcapecitabine卡培他滨to{{U}}?53?{{/U}}hisnasopharyngeal cancer鼻咽症．Afterthreeyearsonthe{{U}}?54?{{/U}}thepatient decidedtovisithisU．S．relativeslastDecember．ButhewasstoppedbyU．S． customsofficials{{U}}?55?{{/U}}4hoursafterenteringthecountry whenthoseofficialscouldn’tgetfingerprintsfromtheman．Therewereno{{U}} ?56?{{/U}}swirly旋涡状的marksappearingfromhisindexfinger． ??U．S．customshasbeenfingerprintingincomingforeignvisitors foryearsTansays．UnfortunatelyfortheSingaporeantraveleronepotential{{U}} ?57?{{/U}}effectofhisdrugtreatmentisasmoothingofthetissue onthefingerpads．{{U}}?58?{{/U}}nofingerprints．?Itis uncertainwhenfingerprint{{U}}?59?{{/U}}willbegintotakeplacein patientswhoaretakingcapecitabineTanpointsout．Sohe{{U}}?60 ?{{/U}}anyphysicianswhoprescribethedrugtoprovidetheirpatientswitha doctor’s{{U}}?61?{{/U}}pointingOutthattheirmedicinemaycause fingerprintstodisappear．??EventuallytheSingaporeantraveler madeitintotheUnitedStates．Buthe’salsonowgottheexplanatorydoctor’s note-andwon’tleavehome{{U}}?62?{{/U}}it．??Bythe waymaybetheFoodandDrugAdministration{{U}}?63?{{/U}}approveduse ofthedrug11yearsagoshouldconsiderupdatingitslistofsideeffects{{U}} ?64?{{/U}}withthismedicine．Thecurrentlistdoesnotethatpatients mayexperiencevomiting呕吐stomachpainandsomeothersideeffects．Butno where{{U}}?65?{{/U}}itmentionthepotentialforlossoffingerprints．
{{*HTML*}}{{B}}第二篇{{/B}} NightoftheLivingAnts? ?Whenanantdiesotherantsmovethedeadinsectoutofthenest．This behaviorisinterestingtoscientistswhowonderhowantsknowforsure-andso soon-thatanotherantisdead．??Dong-HwanChoeascientistat theUniversityofCaliforniafoundthatArgentineantshaveachemicalonthe outsideoftheirbodiesthatsignalstootherantsI’mdead-takemeaway． ??Butthere’satwisttoChoe’sdiscovery．Choesaysthatthe livingants-notjustthedeadones-havethisdeathchemical．Inother wordswhileanantcrawlsaroundperhapsinapicnicorhomeit’stellingother antsthatit’sdead．??Whatkeepsantsfromhaulingawaythe livingdead?ChoefoundthatArgentineantshavetwoadditionalchemicalson theirbodiesandthesetellnearbyantssomethinglikeWait-I’mnotdeadyet． SoChoe’sresearchturneduptwosetsofchemicalsignalsinantsonesaysI’m deadtheothersetsaysI’mnotdeadyet．??Otherscientists havetriedtofigureouthowantsknowwhenanotherantisdead．Ifanantis knockedunconsciousotherantsleaveitaloneuntilitwakesup．Thatmeansants knowthatunmovingantscanstillbealive．??Choesuspectsthat whenanArgentineantdies．thechemicalthatsaysWait-I’mnotdeadyetquickly goesaway．OncethatchemicalisgoneonlytheonethatsaysI’mdeadis left．It’sbecausethedeadantnolongersmellslikealivingantthatitgets carriedtothegraveyard墓地notbecauseitsbodyreleasesnewuniquechemicals afterdeathsaidChoe．Whenotherantsdetectthedeadchemicalwithoutthenot deadyetchemicaltheyhaulawaythebody．ThiswasChoe’shypothesis假设． ??TotesthishypothesisChoeandhisteamputdifferent chemicalsonArgentineantpupae蛹．WhenthescientistsusedtheI’m deadchemicalotherantsquicklyhauledthetreatedpupaeaway．Whenthe scientistsusedtheWait-I’mnotdeadyetchemicalotherantsleftthetreated pupaealone．Choebelievesthisbehaviorshowsthatthenotdeadyetchemical overrides优胜于thedeadchemicalwhenpickedupbyadultants．Andthatwhenan antdiesthenotdeadyetchemicalfadesaway．Othernearbyantsthendetectthe remainingdeadchemicalandremovethebodyfromthenest． AccordingtoChoe’shypothesis
{{*HTML*}}{{B}}第二篇{{/B}} NightoftheLivingAnts? ?Whenanantdiesotherantsmovethedeadinsectoutofthenest．This behaviorisinterestingtoscientistswhowonderhowantsknowforsure-andso soon-thatanotherantisdead．??Dong-HwanChoeascientistat theUniversityofCaliforniafoundthatArgentineantshaveachemicalonthe outsideoftheirbodiesthatsignalstootherantsI’mdead-takemeaway． ??Butthere’satwisttoChoe’sdiscovery．Choesaysthatthe livingants-notjustthedeadones-havethisdeathchemical．Inother wordswhileanantcrawlsaroundperhapsinapicnicorhomeit’stellingother antsthatit’sdead．??Whatkeepsantsfromhaulingawaythe livingdead?ChoefoundthatArgentineantshavetwoadditionalchemicalson theirbodiesandthesetellnearbyantssomethinglikeWait-I’mnotdeadyet． SoChoe’sresearchturneduptwosetsofchemicalsignalsinantsonesaysI’m deadtheothersetsaysI’mnotdeadyet．??Otherscientists havetriedtofigureouthowantsknowwhenanotherantisdead．Ifanantis knockedunconsciousotherantsleaveitaloneuntilitwakesup．Thatmeansants knowthatunmovingantscanstillbealive．??Choesuspectsthat whenanArgentineantdies．thechemicalthatsaysWait-I’mnotdeadyetquickly goesaway．OncethatchemicalisgoneonlytheonethatsaysI’mdeadis left．It’sbecausethedeadantnolongersmellslikealivingantthatitgets carriedtothegraveyard墓地notbecauseitsbodyreleasesnewuniquechemicals afterdeathsaidChoe．Whenotherantsdetectthedeadchemicalwithoutthenot deadyetchemicaltheyhaulawaythebody．ThiswasChoe’shypothesis假设． ??TotesthishypothesisChoeandhisteamputdifferent chemicalsonArgentineantpupae蛹．WhenthescientistsusedtheI’m deadchemicalotherantsquicklyhauledthetreatedpupaeaway．Whenthe scientistsusedtheWait-I’mnotdeadyetchemicalotherantsleftthetreated pupaealone．Choebelievesthisbehaviorshowsthatthenotdeadyetchemical overrides优胜于thedeadchemicalwhenpickedupbyadultants．Andthatwhenan antdiesthenotdeadyetchemicalfadesaway．Othernearbyantsthendetectthe remainingdeadchemicalandremovethebodyfromthenest． ThepassageNightoftheLivingAntstellsusabout
Ienjoyedtheplay-ithadacleverplotandvery{{U}}funny{{/U}}dialogues．
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{{*HTML*}}{{B}}第三篇{{/B}} TheIceman??Ona Septemberdayin1991twoGermanswereclimbingthemountainsbetweenAustria andItaly．Highuponamountainpasstheyfoundthebodyofamanlyingonthe ice．Atthatheight10499feetor3200meterstheiceisusually permanentbut1991hadbeenanespeciallywarmyear．Themountainicehadmelted morethanusualandsothebodyhadcometothesurface．??Itwas lyingfacedownward．Theskeleton骨架wasinperfectconditionexceptforawound inthehead．Therewasstillskinonthebonesandtheremainsofsome clothes．Thehandswerestillholdingthewoodenhandleofanaxandonthefeet therewereverysimpleleatherandclothboots．Nearbywasapairofglovesmade oftreebark树皮andaholderforarrows．??Whowasthisman?How andwhenhadhedied?Everybodyhadadifferentanswertothesequestions．Some peoplethoughtthatitwasfromthiscenturyperhapsthebodyofasoldierwho diedinWorldWarIsinceseveralsoldiershadalreadybeenfoundinthearea．A Swisswomanbelieveditmightbeherfatherwhohaddiedinthosemountains twentyyearsbeforeandwhosebodyhadneverbeenfound．Thescientistswho rushedtolookatthebodythoughtitwasprobablymucholdermaybeevena thousandyearsold．??Withmoderndatingtechniquesthe scientistssoonlearnedthattheIcemanwasabout5300yearsold．Borninabout 3300B．C．helivedduringtheBronzeAgeinEurope．Atfirstscientiststhought hewasprobablyahunterwhohaddiedfromanaccidentinthehigh mountains．Morerecentevidencehowevertellsadifferentstory．Anewkindof X-rayshowsanarrowheadstillstuckinhisshoulder．Itleftonlyatinyholein hisskinbutitcausedinternaldamageandbleeding．Healmostcertainlydied fromthiswoundandnotfromthewoundonthebackofhishead．Thismeansthat hewasprobablyinsortiekindofabattle．Itmayhavebeenpartofalarger warorhemayhavebeenfightingbandits．Hemayevenhavebeenabandithimself． ??Bystudyinghisclothesandtoolsscientistshavealready learnedagreatdealfromtheIcemanaboutthetimeshelivedin．Wemaynever knowthefullstoryofhowhediedbuthehasgivenusimportantcluestothe historyofthosedistanttimes．Whatcanbeinferredfromparagraph2?
{{*HTML*}}? 下面的短文后列出了7个句子请根据短文的内容对每个句子做出判断如果该句提供的是正确信息请选择A如果该句提供的是错误信息请选择B如果该句的信息文中没有提及请选择C ?? AGreatQuakeComing?? ?EveryonewholivesinSanFranciscoknowsthatearthquakesarecommonin theBayArea--andtheycanbedevastating．In1906forexampleamajorquake destroyedabout28000buildingsandkilledhundredsperhapsthousandsof people．ResidentsnowwonderwhenthenextBigOnewillstrike．It’sboundto happensomeday．Atleastsevenactivefault断层linesrunthroughtheSan Franciscoarea．FaultsareplaceswherepiecesofEarth’scrust地壳slidepast eachother．Whenthesepiecesslipthegroundshakes．??Toprepare forthatdayscientistsareusingnewtechniquestoreanalyzethe1906 earthquakeandpredicthowbadthedamagemightbewhenthenextonehappens． ??Onenewfindingaboutthe1906quakeisthattheSanAndreas faultsplitapartfasterthanscientistshadassumedatthetime．Duringsmall earthquakesfaultsrupture断裂atabout2.7kilometerspersecond．Duringbigger quakeshowever．rupturescanhappenatratesfasterthan3.5kilometersper second．??Atsuchhighspeedsmassiveamountsofpressurebuild upgeneratingundergroundwavesthatcancausemoredamagethanthequake itself．LuckyforSanFranciscothesepressurepulses脉冲traveledawayfromthe cityduringthe1906event．Asbadasthedamagewasitcouldhavebeenfar worse．??Lookingahead．scientistsaretryingtopredictwhenthe nextmajorquakewilloccur．Recordsshowthatearthquakeswerecommonbefore 1906．Sincethentheareahasbeenrelativelyquiet．Patternsinthe datahoweversuggestthattheprobabilityofamajorearthquakestrikingtheBay Areabefore2032isatleast62percent．??NewbuildingsinSan Franciscoarequitesafeincaseoffuturequakes．Stillmorethan84percentof thecity’sbuildingsareoldandweak．Analysessuggestthatanothermassive earthquakewouldcauseextensivedamage．??Peoplewholivethere todaytendtofeelsafebecauseSanFranciscohasremainedprettyquietfora while．Accordingtothenewresearchhowever．it’snotamatterofiftheBigOne willhit．It’sjustamatterofwhen．AmajorearthquakestrikingSanFranciscosomedayisinevitable．
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