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Europa’swatery underworld Europa, one of Jupiter’s 63 known moons,looks bright and icy on the sur...
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理工类《单选集》真题及答案
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关于木星的四颗伽利略卫星说法错误的是
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Chimpanzees1.Chimpanzees黑猩猩willsoonbeextinct灭绝.Ifthepresentrateofhuntingandhabitat栖息地destructioncontinuesthenwithin20yearstherewillbenochimpanzeeslivinginthewild.Butthisismorethananenvironmentalormoraltragedy悲剧.Chimpanzeeextinctionmayalsohaveprofoundimplications含意forthesurvivaloftheirdistantrelatives--humanbeings.2.In1975thebiologistMarie-ClaireKingandAllanWilsondiscoveredthatthehumanandchimpanzeegenomes基因组matchbyover98%.Comparethistothemouseusedasmodelforhumandiseaseinlabtestswhichsharesonly60%ofitsDNAwithus.Infactchimpanzeesarefarmoresimilartohumansthantheyaretoanyotherspectesofmonkey.AswellasresemblingUSgeneticallychimpsarehighlyintelligentandabletousetools.Thesefactsaloneshouldbeenoughtomakeprotectionofchimpsanurgentpriority优先.Butthereisanothermoreselfishreasontopreservethechimp.3.Thechimpanzees’trumpcard王牌comesinthefieldofmedicalresearch.Chimpanzeesaresosimilartohumansthatveterinarians兽医oftenrefertohumanmedicaltextbookswhentreatingthem.Yetchimpanzeesdoshowdifferencesinseveralkeyareas.Inparticularchimpsaremuchmoreresistanttoanumberofmajordiseases.Itisthisabilitythatissointeresting.4.ForexamplechimpsseemtoshowamuchhigherresistancethanhumanstoHIVthevirusthatcausesAIDS.IndeedtheiruseasexperimentalanimalsinAIDSresearchhasdeclinedbecausetheyaresoresistant.5.Bysequencingthechimpgenomeandpinpointing找到theplacewherethechimpanzeeDNAsequencediffersfromthatofhumansscientistshopetobeabletodiscoverwhichpartofthegeneticcodegiveschimpstheirincreasedresistancetosomediseases.Thistheyhopewillallowthemtodevelopnewandmoreeffectivetreatmentsforthehumanformsofthesediseases.Suchtreatmentscouldincludetheproductionofnewdrugsoreventhealterationgilaofthehumangeneticsequence.Therecentlycompletedhumangenomesequencingprojecthasshownthatsuchaneffortisnowwellwithinourreach. Paragraph3
{{*HTML*}}请根据短文内容为每题确定1个最佳选项{{B}}第一篇{{/B}} {{B}}Water{{/B}}? ?Thesecondmostimportantconstituent构成成份ofthebiosphere生物圈is liquidwater.Thiscanonlyexistinaverynarrowrangeoftemperaturessince waterfreezesat0℃andboilsat100℃.Lifeasweknowitwouldonlybepossible onthesurfaceofaplanetwhichhadtemperaturessomewherewithinthisnarrow range.??Theearth’ssupplyofwaterprobablyremainsfairly constantinquantity.Thetotalquantityofwaterisnotknownvery accuratelybutitisaboutenoughtocoverthesurfaceoftheglobetoadepth ofabouttwoandthree-quarterkilometers.Mostofitisintheformofthesalt wateroftheoceans--about97percent.?Therestisfreshbut three-quartersofthisisintheformoficeatthePolesandonmountainsand cannotbeusedbylivingsystemsuntilmelted.Oftheremainingfractionwhich issomewhatlessthanonepercentofthewholethereis10～20timesasmuch storedundergroundwaterasthereisactuallyonthesurface.Thereisalsoa tinybutextremelyimportant{{B}}fraction{{/B}}ofthewatersupplywhichis presentaswater?vapourintheatmosphere.??Watervapourin theatmosphereisthechannelthroughwhichthewholewatercirculation循环of thebiospherehastopass.Waterevaporated蒸发fromthesurfaceoftheoceans fromlakesandriversandfrommoist潮湿的earthisaddedtoit.Fromitthewater comesoutagainasrainorsnowfallingoneithertheseaortheland.There isasmightbeexpectedamoreintensiveevaporationperunitareaoverthesea andoceansthanoverthelandbutthereismorerainfalloverthelandthan overtheoceansandthebalanceisrestoredbytherunofffromthelandinthe formofrivers.Thereismorerainfall
{{*HTML*}}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 {{B}}Radiocarbon Dating{{/B}}??Nowadaysscientistscananswermanyquestionsabout thepastthroughatechniquecalledradiocarbon放射orcarbon-14dating.One keytounderstandinghowandwhysomethinghappenedistodiscoverwhenit happened.??Radiocarbondatingwasdevelopedinthelate1940sby physicistWillardF.LibbyattheUniversityofChicago.Anatomofordinary carboncalledcarbon-12hassixprotons质子andsixneutrons中子inits nucleus原子核.Carbon-14orC-14isaradioactiveunstableformofcarbonthat hastwoextraneutrons.?Itreturnstoamorestableformofcarbonthrough aprocesscalleddecay衰减.Thisprocessinvolves?thelossoftheextra neutronsandenergyfromthenucleus.??InLibby’sradiocarbon datingtechniquetheweakradioactiveemissions放射fromthisdecayprocessare countedbyinstrumentssuchasaradiationdetectorandcounter.Thedecayrate isusedtodetermine?theproportionofC-14atomsinthe’samplebeing dated.??Carbon-14isproducedintheEarth’satmospherewhen nitrogen氮-14orN-14interactswithcosmie?rays宇宙射线.Scientists believesincetheEarthwasformedtheamountofnitrogenintheatmosphere ?hasremainedconstant.ConsequentlyC-14formationisthoughttooccurat aconstantrate.NowtheratioofC-14toothercarbonatomsintheatmosphere isknown.Mostscientistsagreethatthisratioisusefulfordatingitemsback toatleast50000years.??AlllifeonEarthismadeoforganic molecules分子thatcontaincarbonatomscomingfromtheatraosphere.?Soall livingthingshaveaboutthesameratioofC-14atomstoothercarbonatomsin theirtissues组织.?Onceanorganism有机体diesitstopstakingincarbonin anyformandtheC-14alreadyresentbeginstodecay.Overtimetheamountof C-14inthematerialdecreasesandtheratioofC-14toothercarbonatomsgoes down.IntermsofradiocarbondatingthefewerC-14atomsinasampletheolder thatsampleis.Radarisusedtodeterminethecharacteristicsofradiocarbon.
{{*HTML*}}{{B}}第三篇{{/B}} {{B}}YouthEmancipationin Spain{{/B}}??TheSpanishGovernmentissoworriedaboutthenumber ofyoungadultsstilllivingwiththeirparents?thatithasdecidedto helpthemleavethenest.??Around55percentofpeopleaged18434 inSpainstillsleepintheirparents’homesaysthelatestre-portfromthe country’sstate-runInstituteofYouth.??Tocoax劝诱youngpeople fromtheirhomestheInstitutestartedaYouthEmancipation解放programmethis month.Theprogrammeoffersguidanceinfindingroomsandjobs.? ?Economistsblameyoungpeople’sfamilydependenceonthe precarious不稳定的labourmarketandincreasinghousingprices.Housingpriceshave risen17percentayearsince2000.??Culturalreasonsalso contributetotheproblemsaysociologists社会学家.FamilytiesinsouthEurope ?--ItalyPortugalandGreece--arestrongerthanthoseinmiddleand northEuropesaidSpanishsoiologist?AlmudenaMorenoMinguezinher reportTheLateEmancipationofSpanishYouth.Keyfor Understanding.??IngeneralyoungpeopleinSpainfirmly believeinthefamilyasthemainbodyaroundwhichtheirprivatelifeis organizedsaidMinguez.??InSpain--especiallyinthe countrysideitisnotuncommontofindentiregroupsofauntsunclescousins niecesandnephews外甥/侄子alllivingonthesamestreet.Theyregularlyget togetherforSunday?dinner.??Parents’toleranceisanother factor.Spanishparentsacceptlate-nightpartyingandare{{B}}waryof{{/B}} setting?bedtimerules.??Achildcanarrivehomeat whatevertimehewants.Ifparentscomplainhe’llputupafightandcallthe fatherafascistsaidJoséAntonioGómezYanezasociologistatCarlosⅢ UniversityinMadrid.??Mothers’willingnesstodochildren’s householdchores家务worsenstheproblem.DionisioMassoa60-year-oldin Madridhasthreechildrenintheir20s.Theeldest28hasagirlfriendanda job.Butlifewithmumisgood.??Hismumdoesthewashandcooks forhim;intheendheliveswellMassosaid.TheYouthEmancipationprogrammeaimsathelpingyoungpeople
{{*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．
Scientistssuspectthatgenesplayasignificantroleinprotectingchimpsfromgetting
{{*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}} {{B}}YouthEmancipationin Spain{{/B}}??TheSpanishGovernmentissoworriedaboutthenumber ofyoungadultsstilllivingwiththeirparents?thatithasdecidedto helpthemleavethenest.??Around55percentofpeopleaged18434 inSpainstillsleepintheirparents’homesaysthelatestre-portfromthe country’sstate-runInstituteofYouth.??Tocoax劝诱youngpeople fromtheirhomestheInstitutestartedaYouthEmancipation解放programmethis month.Theprogrammeoffersguidanceinfindingroomsandjobs.? ?Economistsblameyoungpeople’sfamilydependenceonthe precarious不稳定的labourmarketandincreasinghousingprices.Housingpriceshave risen17percentayearsince2000.??Culturalreasonsalso contributetotheproblemsaysociologists社会学家.FamilytiesinsouthEurope ?--ItalyPortugalandGreece--arestrongerthanthoseinmiddleand northEuropesaidSpanishsoiologist?AlmudenaMorenoMinguezinher reportTheLateEmancipationofSpanishYouth.Keyfor Understanding.??IngeneralyoungpeopleinSpainfirmly believeinthefamilyasthemainbodyaroundwhichtheirprivatelifeis organizedsaidMinguez.??InSpain--especiallyinthe countrysideitisnotuncommontofindentiregroupsofauntsunclescousins niecesandnephews外甥/侄子alllivingonthesamestreet.Theyregularlyget togetherforSunday?dinner.??Parents’toleranceisanother factor.Spanishparentsacceptlate-nightpartyingandare{{B}}waryof{{/B}} setting?bedtimerules.??Achildcanarrivehomeat whatevertimehewants.Ifparentscomplainhe’llputupafightandcallthe fatherafascistsaidJoséAntonioGómezYanezasociologistatCarlosⅢ UniversityinMadrid.??Mothers’willingnesstodochildren’s householdchores家务worsenstheproblem.DionisioMassoa60-year-oldin Madridhasthreechildrenintheir20s.Theeldest28hasagirlfriendanda job.Butlifewithmumisgood.??Hismumdoesthewashandcooks forhim;intheendheliveswellMassosaid.Thephrasewaryofinparagraph8couldbebestreplacedby
{{*HTML*}}{{B}}第二篇{{/B}} {{B}}Mind-reading Machine{{/B}}??AteamofresearchersinCaliforniahasdevelopeda waytopredictwhatkindsofobjectspeoplearelookingatbyscanning扫描what’s happeningintheirbrains.??Whenyoulookatsomethingyoureyes sendasignalaboutthatobjecttoyourbrain.Differentregions?ofthe brainprocesstheinformationyoureyessend.Cellsinyourbraincalled neurons神经元areresponsibleforthisprocessing.??The fMRlfunctionalMagneticResonanceImaging功能怕磁振造影brainscanscouldgenerally matchelectricalactivityinthebraintothebasicshapeofapicturethat someonewaslookingat.??Likeceilsanywhereelseinyourbody activeneuronsuseoxygen.Bloodbringsoxygentotheneuronsandthemore activeaneuronisthemoreoxygenitwillconsume.Themoreactivearegionof thebrainthemoreactiveitsneuronsandinturnthemorebloodwilltravel tothatregion.AndbyusingfMRIscientistscanvisualize使显现whichparts ofthebrainreceivemoreoxygen-richblood--andthereforewhichpartsare workingtoprocessinformation.??AnfMRImachineisadevicethat scansthebrainandmeasureschangesinbloodflowtothebrain.Thetechnology showsresearchershowbrainactivitychangeswhenapersonthinkslooksat somethingorcarriesoutanactivitylikespeakingorreading.By {{B}}highlightingtheareasofthebrainatwork{{/B}}whenapersonlooksat differentimagesfMRImayhelpscientistsdeterminespecificpatternsofbrain activityassociated?withdifferentkindsofimages.??The Californiaresearcherstestedbrainactivitybyhavingtwovolunteersview hundredsofpicturesofeverydayobjectslikepeopleanimalsandfruits.The scientistsusedanfMRImachinetorecordthevolunteers’?brainactivity witheachphotographtheylookedat.Differentobjectscauseddifferentregions ofthevolunteers’brainstolightuponthescanindicatingactivity.The scientistsusedthisinformationtobuildamodeltopredicthowthebrainmight respondtoanyimagetheeyessee.??Inasecondtestthe scientistsaskedthevolunteerstolookat120newpictures.Likebeforetheir brainswerescannedeverytimetheylookedatanewimage.Thistimethe scientistsusedtheirmodeltomatchthefMRIscanstotheimage.Forexample ifascaninthesecondtestshowedthesamepatternofbrainactivitythatwas stronglyrelatedtopicturesofapplesinthefirsttesttheirmodelwouldhave predicted?thevolunteerswerelookingat apples.ThefunctionofanfMRImachineis
{{*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*}}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 {{B}}Radiocarbon Dating{{/B}}??Nowadaysscientistscananswermanyquestionsabout thepastthroughatechniquecalledradiocarbon放射orcarbon-14dating.One keytounderstandinghowandwhysomethinghappenedistodiscoverwhenit happened.??Radiocarbondatingwasdevelopedinthelate1940sby physicistWillardF.LibbyattheUniversityofChicago.Anatomofordinary carboncalledcarbon-12hassixprotons质子andsixneutrons中子inits nucleus原子核.Carbon-14orC-14isaradioactiveunstableformofcarbonthat hastwoextraneutrons.?Itreturnstoamorestableformofcarbonthrough aprocesscalleddecay衰减.Thisprocessinvolves?thelossoftheextra neutronsandenergyfromthenucleus.??InLibby’sradiocarbon datingtechniquetheweakradioactiveemissions放射fromthisdecayprocessare countedbyinstrumentssuchasaradiationdetectorandcounter.Thedecayrate isusedtodetermine?theproportionofC-14atomsinthe’samplebeing dated.??Carbon-14isproducedintheEarth’satmospherewhen nitrogen氮-14orN-14interactswithcosmie?rays宇宙射线.Scientists believesincetheEarthwasformedtheamountofnitrogenintheatmosphere ?hasremainedconstant.ConsequentlyC-14formationisthoughttooccurat aconstantrate.NowtheratioofC-14toothercarbonatomsintheatmosphere isknown.Mostscientistsagreethatthisratioisusefulfordatingitemsback toatleast50000years.??AlllifeonEarthismadeoforganic molecules分子thatcontaincarbonatomscomingfromtheatraosphere.?Soall livingthingshaveaboutthesameratioofC-14atomstoothercarbonatomsin theirtissues组织.?Onceanorganism有机体diesitstopstakingincarbonin anyformandtheC-14alreadyresentbeginstodecay.Overtimetheamountof C-14inthematerialdecreasesandtheratioofC-14toothercarbonatomsgoes down.IntermsofradiocarbondatingthefewerC-14atomsinasampletheolder thatsampleis.Theradiocarbondatingtechniqueisonlyabout40yearsold.
ThereisalwaysexcitementattheolympicGameswhenanathlete{{U}}breaks{{/U}}arecord.
{{*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}} {{B}}YouthEmancipationin Spain{{/B}}??TheSpanishGovernmentissoworriedaboutthenumber ofyoungadultsstilllivingwiththeirparents?thatithasdecidedto helpthemleavethenest.??Around55percentofpeopleaged18434 inSpainstillsleepintheirparents’homesaysthelatestre-portfromthe country’sstate-runInstituteofYouth.??Tocoax劝诱youngpeople fromtheirhomestheInstitutestartedaYouthEmancipation解放programmethis month.Theprogrammeoffersguidanceinfindingroomsandjobs.? ?Economistsblameyoungpeople’sfamilydependenceonthe precarious不稳定的labourmarketandincreasinghousingprices.Housingpriceshave risen17percentayearsince2000.??Culturalreasonsalso contributetotheproblemsaysociologists社会学家.FamilytiesinsouthEurope ?--ItalyPortugalandGreece--arestrongerthanthoseinmiddleand northEuropesaidSpanishsoiologist?AlmudenaMorenoMinguezinher reportTheLateEmancipationofSpanishYouth.Keyfor Understanding.??IngeneralyoungpeopleinSpainfirmly believeinthefamilyasthemainbodyaroundwhichtheirprivatelifeis organizedsaidMinguez.??InSpain--especiallyinthe countrysideitisnotuncommontofindentiregroupsofauntsunclescousins niecesandnephews外甥/侄子alllivingonthesamestreet.Theyregularlyget togetherforSunday?dinner.??Parents’toleranceisanother factor.Spanishparentsacceptlate-nightpartyingandare{{B}}waryof{{/B}} setting?bedtimerules.??Achildcanarrivehomeat whatevertimehewants.Ifparentscomplainhe’llputupafightandcallthe fatherafascistsaidJoséAntonioGómezYanezasociologistatCarlosⅢ UniversityinMadrid.??Mothers’willingnesstodochildren’s householdchores家务worsenstheproblem.DionisioMassoa60-year-oldin Madridhasthreechildrenintheir20s.Theeldest28hasagirlfriendanda job.Butlifewithmumisgood.??Hismumdoesthewashandcooks forhim;intheendheliveswellMassosaid.Youngpeople’sfamilydependencecanbeattributedtoallthefollowingfactorsEXCEPT
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{{*HTML*}}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 {{B}}Radiocarbon Dating{{/B}}??Nowadaysscientistscananswermanyquestionsabout thepastthroughatechniquecalledradiocarbon放射orcarbon-14dating.One keytounderstandinghowandwhysomethinghappenedistodiscoverwhenit happened.??Radiocarbondatingwasdevelopedinthelate1940sby physicistWillardF.LibbyattheUniversityofChicago.Anatomofordinary carboncalledcarbon-12hassixprotons质子andsixneutrons中子inits nucleus原子核.Carbon-14orC-14isaradioactiveunstableformofcarbonthat hastwoextraneutrons.?Itreturnstoamorestableformofcarbonthrough aprocesscalleddecay衰减.Thisprocessinvolves?thelossoftheextra neutronsandenergyfromthenucleus.??InLibby’sradiocarbon datingtechniquetheweakradioactiveemissions放射fromthisdecayprocessare countedbyinstrumentssuchasaradiationdetectorandcounter.Thedecayrate isusedtodetermine?theproportionofC-14atomsinthe’samplebeing dated.??Carbon-14isproducedintheEarth’satmospherewhen nitrogen氮-14orN-14interactswithcosmie?rays宇宙射线.Scientists believesincetheEarthwasformedtheamountofnitrogenintheatmosphere ?hasremainedconstant.ConsequentlyC-14formationisthoughttooccurat aconstantrate.NowtheratioofC-14toothercarbonatomsintheatmosphere isknown.Mostscientistsagreethatthisratioisusefulfordatingitemsback toatleast50000years.??AlllifeonEarthismadeoforganic molecules分子thatcontaincarbonatomscomingfromtheatraosphere.?Soall livingthingshaveaboutthesameratioofC-14atomstoothercarbonatomsin theirtissues组织.?Onceanorganism有机体diesitstopstakingincarbonin anyformandtheC-14alreadyresentbeginstodecay.Overtimetheamountof C-14inthematerialdecreasesandtheratioofC-14toothercarbonatomsgoes down.IntermsofradiocarbondatingthefewerC-14atomsinasampletheolder thatsampleis.WhenanorganismdiestheC-14initbeginstodecay.
ReducePackagingPressureincreasedrecentlyonBritishsupermarketsandretailerstoreducepackagingaspartofananti-wastecampaign.46Britaingenerates4.6milliontonsofhouseholdwasteeveryyearbypackaging.Dozensofpeoplehaveexpressedangerattheexcessofplasticwrapping.CampaignershavecalledonBritaintolearnfromotherEuropeancountries.47Whenreturnedbottlesareputinavendingmachine自动售货机thedepositisrefunded.EnvironmentalistswarnthatBritainlagsbehindinthis.Therewerereportsofgrowinguneaseamongconsumersovertheamountofpackagingtheyhavetodealwith.Tradestandardsofficersalsoobjecttoexcessivepackaging.48InresponsetoacampaignbyBritain’sTheIndependentnewspaperleadingsupermarketshavepointedtovariousinitiativestowinthepublicconfidence.49Butcampaignerssaidretailersandthegovernmentcouldlearnmuchfromanti-wastepracticesontheContinent.InSwedennon-recyclablebatterieshavebeentaxedsince1991toencourageaswitchtoalternatives.50InGermanyplasticbagsareunheardofinsupermarketsanddepositsarepaidforreusableplasticandglassbeveragebottles. 47
{{*HTML*}}请根据短文内容为每题确定1个最佳选项{{B}}第一篇{{/B}} {{B}}Water{{/B}}? ?Thesecondmostimportantconstituent构成成份ofthebiosphere生物圈is liquidwater.Thiscanonlyexistinaverynarrowrangeoftemperaturessince waterfreezesat0℃andboilsat100℃.Lifeasweknowitwouldonlybepossible onthesurfaceofaplanetwhichhadtemperaturessomewherewithinthisnarrow range.??Theearth’ssupplyofwaterprobablyremainsfairly constantinquantity.Thetotalquantityofwaterisnotknownvery accuratelybutitisaboutenoughtocoverthesurfaceoftheglobetoadepth ofabouttwoandthree-quarterkilometers.Mostofitisintheformofthesalt wateroftheoceans--about97percent.?Therestisfreshbut three-quartersofthisisintheformoficeatthePolesandonmountainsand cannotbeusedbylivingsystemsuntilmelted.Oftheremainingfractionwhich issomewhatlessthanonepercentofthewholethereis10～20timesasmuch storedundergroundwaterasthereisactuallyonthesurface.Thereisalsoa tinybutextremelyimportant{{B}}fraction{{/B}}ofthewatersupplywhichis presentaswater?vapourintheatmosphere.??Watervapourin theatmosphereisthechannelthroughwhichthewholewatercirculation循环of thebiospherehastopass.Waterevaporated蒸发fromthesurfaceoftheoceans fromlakesandriversandfrommoist潮湿的earthisaddedtoit.Fromitthewater comesoutagainasrainorsnowfallingoneithertheseaortheland.There isasmightbeexpectedamoreintensiveevaporationperunitareaoverthesea andoceansthanoverthelandbutthereismorerainfalloverthelandthan overtheoceansandthebalanceisrestoredbytherunofffromthelandinthe formofrivers.Liquidwateronlyexists
{{*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*}}请根据短文内容为每题确定1个最佳选项{{B}}第一篇{{/B}} {{B}}Water{{/B}}? ?Thesecondmostimportantconstituent构成成份ofthebiosphere生物圈is liquidwater.Thiscanonlyexistinaverynarrowrangeoftemperaturessince waterfreezesat0℃andboilsat100℃.Lifeasweknowitwouldonlybepossible onthesurfaceofaplanetwhichhadtemperaturessomewherewithinthisnarrow range.??Theearth’ssupplyofwaterprobablyremainsfairly constantinquantity.Thetotalquantityofwaterisnotknownvery accuratelybutitisaboutenoughtocoverthesurfaceoftheglobetoadepth ofabouttwoandthree-quarterkilometers.Mostofitisintheformofthesalt wateroftheoceans--about97percent.?Therestisfreshbut three-quartersofthisisintheformoficeatthePolesandonmountainsand cannotbeusedbylivingsystemsuntilmelted.Oftheremainingfractionwhich issomewhatlessthanonepercentofthewholethereis10～20timesasmuch storedundergroundwaterasthereisactuallyonthesurface.Thereisalsoa tinybutextremelyimportant{{B}}fraction{{/B}}ofthewatersupplywhichis presentaswater?vapourintheatmosphere.??Watervapourin theatmosphereisthechannelthroughwhichthewholewatercirculation循环of thebiospherehastopass.Waterevaporated蒸发fromthesurfaceoftheoceans fromlakesandriversandfrommoist潮湿的earthisaddedtoit.Fromitthewater comesoutagainasrainorsnowfallingoneithertheseaortheland.There isasmightbeexpectedamoreintensiveevaporationperunitareaoverthesea andoceansthanoverthelandbutthereismorerainfalloverthelandthan overtheoceansandthebalanceisrestoredbytherunofffromthelandinthe formofrivers.MostofthefleshwateronEarth
{{*HTML*}}{{B}}第二篇{{/B}} {{B}}Mind-reading Machine{{/B}}??AteamofresearchersinCaliforniahasdevelopeda waytopredictwhatkindsofobjectspeoplearelookingatbyscanning扫描what’s happeningintheirbrains.??Whenyoulookatsomethingyoureyes sendasignalaboutthatobjecttoyourbrain.Differentregions?ofthe brainprocesstheinformationyoureyessend.Cellsinyourbraincalled neurons神经元areresponsibleforthisprocessing.??The fMRlfunctionalMagneticResonanceImaging功能怕磁振造影brainscanscouldgenerally matchelectricalactivityinthebraintothebasicshapeofapicturethat someonewaslookingat.??Likeceilsanywhereelseinyourbody activeneuronsuseoxygen.Bloodbringsoxygentotheneuronsandthemore activeaneuronisthemoreoxygenitwillconsume.Themoreactivearegionof thebrainthemoreactiveitsneuronsandinturnthemorebloodwilltravel tothatregion.AndbyusingfMRIscientistscanvisualize使显现whichparts ofthebrainreceivemoreoxygen-richblood--andthereforewhichpartsare workingtoprocessinformation.??AnfMRImachineisadevicethat scansthebrainandmeasureschangesinbloodflowtothebrain.Thetechnology showsresearchershowbrainactivitychangeswhenapersonthinkslooksat somethingorcarriesoutanactivitylikespeakingorreading.By {{B}}highlightingtheareasofthebrainatwork{{/B}}whenapersonlooksat differentimagesfMRImayhelpscientistsdeterminespecificpatternsofbrain activityassociated?withdifferentkindsofimages.??The Californiaresearcherstestedbrainactivitybyhavingtwovolunteersview hundredsofpicturesofeverydayobjectslikepeopleanimalsandfruits.The scientistsusedanfMRImachinetorecordthevolunteers’?brainactivity witheachphotographtheylookedat.Differentobjectscauseddifferentregions ofthevolunteers’brainstolightuponthescanindicatingactivity.The scientistsusedthisinformationtobuildamodeltopredicthowthebrainmight respondtoanyimagetheeyessee.??Inasecondtestthe scientistsaskedthevolunteerstolookat120newpictures.Likebeforetheir brainswerescannedeverytimetheylookedatanewimage.Thistimethe scientistsusedtheirmodeltomatchthefMRIscanstotheimage.Forexample ifascaninthesecondtestshowedthesamepatternofbrainactivitythatwas stronglyrelatedtopicturesofapplesinthefirsttesttheirmodelwouldhave predicted?thevolunteerswerelookingat apples.Theresearchersexperimentedon
{{*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．
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Chimpanzeeextinctionmayaffect
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Chimpanzees1.Chimpanzees黑猩猩willsoonbeextinct灭绝.Ifthepresentrateofhuntingandhabitat栖息地destructioncontinuesthenwithin20yearstherewillbenochimpanzeeslivinginthewild.Butthisismorethananenvironmentalormoraltragedy悲剧.Chimpanzeeextinctionmayalsohaveprofoundimplications含意forthesurvivaloftheirdistantrelatives--humanbeings.2.In1975thebiologistMarie-ClaireKingandAllanWilsondiscoveredthatthehumanandchimpanzeegenomes基因组matchbyover98%.Comparethistothemouseusedasmodelforhumandiseaseinlabtestswhichsharesonly60%ofitsDNAwithus.Infactchimpanzeesarefarmoresimilartohumansthantheyaretoanyotherspectesofmonkey.AswellasresemblingUSgeneticallychimpsarehighlyintelligentandabletousetools.Thesefactsaloneshouldbeenoughtomakeprotectionofchimpsanurgentpriority优先.Butthereisanothermoreselfishreasontopreservethechimp.3.Thechimpanzees’trumpcard王牌comesinthefieldofmedicalresearch.Chimpanzeesaresosimilartohumansthatveterinarians兽医oftenrefertohumanmedicaltextbookswhentreatingthem.Yetchimpanzeesdoshowdifferencesinseveralkeyareas.Inparticularchimpsaremuchmoreresistanttoanumberofmajordiseases.Itisthisabilitythatissointeresting.4.ForexamplechimpsseemtoshowamuchhigherresistancethanhumanstoHIVthevirusthatcausesAIDS.IndeedtheiruseasexperimentalanimalsinAIDSresearchhasdeclinedbecausetheyaresoresistant.5.Bysequencingthechimpgenomeandpinpointing找到theplacewherethechimpanzeeDNAsequencediffersfromthatofhumansscientistshopetobeabletodiscoverwhichpartofthegeneticcodegiveschimpstheirincreasedresistancetosomediseases.Thistheyhopewillallowthemtodevelopnewandmoreeffectivetreatmentsforthehumanformsofthesediseases.Suchtreatmentscouldincludetheproductionofnewdrugsoreventhealterationgilaofthehumangeneticsequence.Therecentlycompletedhumangenomesequencingprojecthasshownthatsuchaneffortisnowwellwithinourreach. Paragraph1
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