Ahandfulofpeoplecanrecallalmosteverydayoftheirlivesinenormousdetail一andafteryearsofresearch，neuroscientistsarefinallybeginningtounderstandhowtheydoit.A)Formostofus,memoryisamessofblurredandfadedpicturesofourlives.Asmuchaswewouldliketoclingontoourpast,eventhesaddestmomentscanbewashedawaywithtime.B)AskNimaVeisehwhathewasdoingforanydayinthepast15years,however,andhewillgiveyouthedetailsoftheweather,whathewaswearing,orevenwhatsideofthetrainhewassittingonhisjourneytowork.'Mymemoryislikealibraryofvideotapes,walk-throughsofeverydayofmylifefromwakingtosleeping,'heexplains.C)Veisehcanevenputadateonwhenthosetapesstartedrecording:15December2000,whenhemethisfirstgirlfriendathisbestfriend's16thbirthdayparty.Hehadalwayshadagoodmemory,butthethrillofyoungloveseemstohaveshiftedagearinhismind:fromnowon,hewouldstartrecordinghiswholelifeindetail.'Icouldtellyoueverythingabouteverydayafterthat.'D)Needlesstosay,peoplelikeVeisehareofgreatinteresttoneuroscientists（神经科学专家）hopingtounderstandthewaythebrainrecordsourlives.Acoupleofrecentpapershavefinallyopenedawindowonthesepeople'sextraordinaryminds.Andsuchresearchmightevensuggestwaysforusalltoreliveourpastwithgreaterclarity.E)'Highlysuperiorautobiographicalmemory'(orHSAMforshort),firstcametolightintheearly2000s,withayoungwomannamedJillPrice.EmailingtheneuroscientistandmemoryresearcherJimMcGaughoneday,sheclaimedthatshecouldrecalleverydayofherlifesincetheageof12.Couldhehelpexplainherexperiences?F)McGaughinvitedhertohislab,andbegantotesther:hewouldgiveheradateandaskhertotellhimabouttheworldeventsonthatday.Truetoherword,shewascorrectalmosteverytime.G)Itdidn'ttakelongformagazinesanddocumentaryfilm-makerstocometounderstandher'totalrecall',andthankstothesubsequentmediainterest,afewdozenothersubjects(includingVeiseh)havesincecomeforwardandcontactedtheteamattheUniversityofCalifornia,Irvine.H)Interestingly,theirmemoriesarehighlyself-centred:althoughtheycanremember'autobiographical'lifeeventsinextraordinarydetail,theyseemtobenobetterthanaverageatrecallingimpersonalinformation,suchasrandom（任意选取的）listsofwords.Noraretheynecessarilybetteratrememberingaroundofdrinks,say.Andalthoughtheirmemoriesarevast,theyarestilllikelytosufferfrom'falsememories'.Clearly,thereisnosuchthingasa'perfect'memory—theirextraordinarymindsarestillusingthesameflawedtoolsthattherestofusrelyon.Thequestionis,how?I)LawrencePatihisattheUniversityofSouthernMississippirecentlystudiedaround20peoplewithHSAMandfoundthattheyscoredparticularlyhighontwomeasures:fantasyproneness(倾向）andabsorption.Fantasypronenesscouldbeconsideredatendencytoimagineanddaydream,whereasabsorptionisthetendencytoallowyourmindtobecomefullyabsorbedinanactivity—topaycompleteattentiontothesensations(感受）andtheexperiences.'I'mextremelysensitivetosounds,smellsandvisualdetail,'explainsNicoleDonohue,whohastakenpartinmanyofthesestudies.'Idefinitelyfeelthingsmorestronglythantheaverageperson.'J)Theabsorptionhelpsthemtoestablishstrongfoundationsforrecollection,saysPatihis,andthefantasypronenessmeansthattheyrevisitthosememoriesagainandagaininthecomingweeksandmonths.Eachtimethisinitialmemorytraceis'replayed',itbecomesevenstronger.Insomeways,youprobablygothroughthatprocessafterabigeventlikeyourweddingday—butthedifferenceisthatthankstotheirotherpsychologicaltendencies,theHSAMsubjectsaredoingitdayin,dayout,forthewholeoftheirlives.K)NoteveryonewithatendencytofantasisewilldevelopHSAM,though,soPatihissuggeststhatsomethingmusthavecausedthemtothinksomuchabouttheirpast.'Maybesomeexperienceintheirchildhoodmeantthattheybecameobsessed(着迷）withcalendarsandwhathappenedtothem,'saysPatihis.L)ThepeoplewithHSAMI'veinterviewedwouldcertainlyagreethatitcanbeamixedblessing.Ontheplusside,itallowsyoutorelivethemosttransformativeandenrichingexperiences.Veiseh,forinstance,travelledalotinhisyouth.Inhissparetime,hevisitedthelocalartgalleries,andthepaintingsarenowlodgeddeepinhisautobiographicalmemories.M)'Imaginebeingabletoremembereverypainting,oneverywall,ineverygalleryspace,betweennearly40countries,'hesays.'That'sabigeducationinartbyitself.'Withthiscomprehensiveknowledgeofthehistoryofart,hehassincebecomeaprofessionalpainter.N)Donohue,nowahistoryteacher,agreesthatithelpedduringcertainpartsofhereducation:'IcandefinitelyrememberwhatIlearnedoncertaindaysatschool.Icouldimaginewhattheteacherwassayingorwhatitlookedlikeinthebook.'O)NoteveryonewithHSAMhasexperiencedthesebenefits，however.Viewingthepastinhighdefinitioncanmakeitverydifficulttogetoverpainandregret.'Itcanbeveryhardtoforgetembarrassingmoments,'saysDonohue.'Youfeelthesameemotions—itisjustasraw,justasfresh...Youcan'tturnoffthatstreamofmemories,nomatterhowhardyoutry.'Veisehagrees:'Itislikehavingtheseopenwounds—theyarejustapartofyou,'hesays.P)Thismeanstheyoftenhavetomakeaspecialefforttolaythepasttorest.Bill,forinstance,oftengetspainful'flashbacks',inwhichunwantedmemoriesintrudeintohisconsciousness,butoverallhehaschosentoseeitasthebestwayofavoidingrepeatingthesamemistakes.'Somepeopleareabsorbedinthepastbutnotopentonewmemories,butthat'snotthecaseforme.Ilookforwardtoeachdayandexperiencingsomethingnew.'36.PeoplewithHSAMhavethesamememoryasordinarypeoplewhenitcomestoimpersonalinformation.37.FantasypronenesswillnotnecessarilycausepeopletodevelopHSAM.38.Veisehbegantorememberthedetailsofhiseverydayexperiencesafterhemethisfirstyounglove.39.ManymorepeoplewithHSAMstartedtocontactresearchersduetothemassmedia.40.PeoplewithHSAMoftenhavetomakeeffortstoavoidfocusingonthepast.41.Mostpeopledonothaveclearmemoriesofpastevents.42.HSAMcanbebothacurseandablessing.43.Ayoungwomansoughtexplanationfromabrainscientistwhenshenoticedherunusualmemory.44.SomepeoplewithHSAMfinditveryhardtogetridofunpleasantmemories.45.ArecentstudyofpeoplewithHSAMrevealsthattheyareliabletofantasyandfullabsorptioninanactivity.
Ahandfulofpeoplecanrecallalmosteverydayoftheirlivesinenormousdetail一andafteryearsofresearch，neuroscientistsarefinallybeginningtounderstandhowtheydoit.A)Formostofus,memoryisamessofblurredandfadedpicturesofourlives.Asmuchaswewouldliketoclingontoourpast,eventhesaddestmomentscanbewashedawaywithtime.B)AskNimaVeisehwhathewasdoingforanydayinthepast15years,however,andhewillgiveyouthedetailsoftheweather,whathewaswearing,orevenwhatsideofthetrainhewassittingonhisjourneytowork.'Mymemoryislikealibraryofvideotapes,walk-throughsofeverydayofmylifefromwakingtosleeping,'heexplains.C)Veisehcanevenputadateonwhenthosetapesstartedrecording:15December2000,whenhemethisfirstgirlfriendathisbestfriend's16thbirthdayparty.Hehadalwayshadagoodmemory,butthethrillofyoungloveseemstohaveshiftedagearinhismind:fromnowon,hewouldstartrecordinghiswholelifeindetail.'Icouldtellyoueverythingabouteverydayafterthat.'D)Needlesstosay,peoplelikeVeisehareofgreatinteresttoneuroscientists（神经科学专家）hopingtounderstandthewaythebrainrecordsourlives.Acoupleofrecentpapershavefinallyopenedawindowonthesepeople'sextraordinaryminds.Andsuchresearchmightevensuggestwaysforusalltoreliveourpastwithgreaterclarity.E)'Highlysuperiorautobiographicalmemory'(orHSAMforshort),firstcametolightintheearly2000s,withayoungwomannamedJillPrice.EmailingtheneuroscientistandmemoryresearcherJimMcGaughoneday,sheclaimedthatshecouldrecalleverydayofherlifesincetheageof12.Couldhehelpexplainherexperiences?F)McGaughinvitedhertohislab,andbegantotesther:hewouldgiveheradateandaskhertotellhimabouttheworldeventsonthatday.Truetoherword,shewascorrectalmosteverytime.G)Itdidn'ttakelongformagazinesanddocumentaryfilm-makerstocometounderstandher'totalrecall',andthankstothesubsequentmediainterest,afewdozenothersubjects(includingVeiseh)havesincecomeforwardandcontactedtheteamattheUniversityofCalifornia,Irvine.H)Interestingly,theirmemoriesarehighlyself-centred:althoughtheycanremember'autobiographical'lifeeventsinextraordinarydetail,theyseemtobenobetterthanaverageatrecallingimpersonalinformation,suchasrandom（任意选取的）listsofwords.Noraretheynecessarilybetteratrememberingaroundofdrinks,say.Andalthoughtheirmemoriesarevast,theyarestilllikelytosufferfrom'falsememories'.Clearly,thereisnosuchthingasa'perfect'memory—theirextraordinarymindsarestillusingthesameflawedtoolsthattherestofusrelyon.Thequestionis,how?I)LawrencePatihisattheUniversityofSouthernMississippirecentlystudiedaround20peoplewithHSAMandfoundthattheyscoredparticularlyhighontwomeasures:fantasyproneness(倾向）andabsorption.Fantasypronenesscouldbeconsideredatendencytoimagineanddaydream,whereasabsorptionisthetendencytoallowyourmindtobecomefullyabsorbedinanactivity—topaycompleteattentiontothesensations(感受）andtheexperiences.'I'mextremelysensitivetosounds,smellsandvisualdetail,'explainsNicoleDonohue,whohastakenpartinmanyofthesestudies.'Idefinitelyfeelthingsmorestronglythantheaverageperson.'J)Theabsorptionhelpsthemtoestablishstrongfoundationsforrecollection,saysPatihis,andthefantasypronenessmeansthattheyrevisitthosememoriesagainandagaininthecomingweeksandmonths.Eachtimethisinitialmemorytraceis'replayed',itbecomesevenstronger.Insomeways,youprobablygothroughthatprocessafterabigeventlikeyourweddingday—butthedifferenceisthatthankstotheirotherpsychologicaltendencies,theHSAMsubjectsaredoingitdayin,dayout,forthewholeoftheirlives.K)NoteveryonewithatendencytofantasisewilldevelopHSAM,though,soPatihissuggeststhatsomethingmusthavecausedthemtothinksomuchabouttheirpast.'Maybesomeexperienceintheirchildhoodmeantthattheybecameobsessed(着迷）withcalendarsandwhathappenedtothem,'saysPatihis.L)ThepeoplewithHSAMI'veinterviewedwouldcertainlyagreethatitcanbeamixedblessing.Ontheplusside,itallowsyoutorelivethemosttransformativeandenrichingexperiences.Veiseh,forinstance,travelledalotinhisyouth.Inhissparetime,hevisitedthelocalartgalleries,andthepaintingsarenowlodgeddeepinhisautobiographicalmemories.M)'Imaginebeingabletoremembereverypainting,oneverywall,ineverygalleryspace,betweennearly40countries,'hesays.'That'sabigeducationinartbyitself.'Withthiscomprehensiveknowledgeofthehistoryofart,hehassincebecomeaprofessionalpainter.N)Donohue,nowahistoryteacher,agreesthatithelpedduringcertainpartsofhereducation:'IcandefinitelyrememberwhatIlearnedoncertaindaysatschool.Icouldimaginewhattheteacherwassayingorwhatitlookedlikeinthebook.'O)NoteveryonewithHSAMhasexperiencedthesebenefits，however.Viewingthepastinhighdefinitioncanmakeitverydifficulttogetoverpainandregret.'Itcanbeveryhardtoforgetembarrassingmoments,'saysDonohue.'Youfeelthesameemotions—itisjustasraw,justasfresh...Youcan'tturnoffthatstreamofmemories,nomatterhowhardyoutry.'Veisehagrees:'Itislikehavingtheseopenwounds—theyarejustapartofyou,'hesays.P)Thismeanstheyoftenhavetomakeaspecialefforttolaythepasttorest.Bill,forinstance,oftengetspainful'flashbacks',inwhichunwantedmemoriesintrudeintohisconsciousness,butoverallhehaschosentoseeitasthebestwayofavoidingrepeatingthesamemistakes.'Somepeopleareabsorbedinthepastbutnotopentonewmemories,butthat'snotthecaseforme.Ilookforwardtoeachdayandexperiencingsomethingnew.'36.PeoplewithHSAMhavethesamememoryasordinarypeoplewhenitcomestoimpersonalinformation.37.FantasypronenesswillnotnecessarilycausepeopletodevelopHSAM.38.Veisehbegantorememberthedetailsofhiseverydayexperiencesafterhemethisfirstyounglove.39.ManymorepeoplewithHSAMstartedtocontactresearchersduetothemassmedia.40.PeoplewithHSAMoftenhavetomakeeffortstoavoidfocusingonthepast.41.Mostpeopledonothaveclearmemoriesofpastevents.42.HSAMcanbebothacurseandablessing.43.Ayoungwomansoughtexplanationfromabrainscientistwhenshenoticedherunusualmemory.44.SomepeoplewithHSAMfinditveryhardtogetridofunpleasantmemories.45.ArecentstudyofpeoplewithHSAMrevealsthattheyareliabletofantasyandfullabsorptioninanactivity.
氢原子轨道的能级高低是 A: E(1s)<E(2s)<E(2p)<E(3s)<E(3p)<E(3d)<E(4s) B: E(1s)<E(2s)<E(2p)<E(3s)<E(3p)<E(4s)<E(3d) C: E(1s)<E(2s)=E(2p)<E(3s)=E(3p)<E(4s)<E(3d) D: E(1s)<E(2s)=E(2p)<E(3s)=E(3p)=E(3d)<E(4s)
氢原子轨道的能级高低是 A: E(1s)<E(2s)<E(2p)<E(3s)<E(3p)<E(3d)<E(4s) B: E(1s)<E(2s)<E(2p)<E(3s)<E(3p)<E(4s)<E(3d) C: E(1s)<E(2s)=E(2p)<E(3s)=E(3p)<E(4s)<E(3d) D: E(1s)<E(2s)=E(2p)<E(3s)=E(3p)=E(3d)<E(4s)
E→ E + E | E - E | E * E | E / E | ( E ) | i 下面的推导过程是句子i+i*i的规范推导的是: E=>E*E=>E*i=>E+E*i=>E+i*i=>i+i*i|E=>E*E=>E*i=>E+E*i=>i+E*i=>i+i*i|E=>E+E=>E+E*E=>E+E*i=>E+i*i=>i+i*i|E=>E+E=>E+E*E=>E+i*E=>E+i*i=>i+i*i
E→ E + E | E - E | E * E | E / E | ( E ) | i 下面的推导过程是句子i+i*i的规范推导的是: E=>E*E=>E*i=>E+E*i=>E+i*i=>i+i*i|E=>E*E=>E*i=>E+E*i=>i+E*i=>i+i*i|E=>E+E=>E+E*E=>E+E*i=>E+i*i=>i+i*i|E=>E+E=>E+E*E=>E+i*E=>E+i*i=>i+i*i
下列情况中，属于饱和状态的是（ ）。 A: E≠e B: E＞e C: E=e D: E＜e
下列情况中，属于饱和状态的是（ ）。 A: E≠e B: E＞e C: E=e D: E＜e
一维、二维、三维k空间中，能级密度Z(E)与能量E之间的关系分别对应满足( ) A: Z(E)=常数、Z(E)∝√E、Z(E)∝１／√E B: Z(E)∝√E、Z(E)=常数、Z(E)∝１／√E C: Z(E)∝√E、Z(E)∝１／√E、Z(E)=常数 D: Z(E)∝１／√Z(E)=常数、Z(E) ∝√E
一维、二维、三维k空间中，能级密度Z(E)与能量E之间的关系分别对应满足( ) A: Z(E)=常数、Z(E)∝√E、Z(E)∝１／√E B: Z(E)∝√E、Z(E)=常数、Z(E)∝１／√E C: Z(E)∝√E、Z(E)∝１／√E、Z(E)=常数 D: Z(E)∝１／√Z(E)=常数、Z(E) ∝√E
掺铒光纤放大器（EDFA）中Er A: E吸收＞E激发＋E自发 B: E自发＞E吸收＋E激发 C: E激发＞E自发＋E吸收 D: E自发＜E吸收＋E激发
掺铒光纤放大器（EDFA）中Er A: E吸收＞E激发＋E自发 B: E自发＞E吸收＋E激发 C: E激发＞E自发＋E吸收 D: E自发＜E吸收＋E激发
下列关于停留时间分布密度函数的描述，正确的是 。 A、E（φ）=E（τ） B、E（φ）=τE（τ） C、E（τ）=τE（φ） D、以上均不正确 A: E（φ）=τE（τ） B: E（φ）=E（τ） C: E（τ）=τE（φ） D: 以上均不正确
下列关于停留时间分布密度函数的描述，正确的是 。 A、E（φ）=E（τ） B、E（φ）=τE（τ） C、E（τ）=τE（φ） D、以上均不正确 A: E（φ）=τE（τ） B: E（φ）=E（τ） C: E（τ）=τE（φ） D: 以上均不正确
语句while（!e）；中条件!e等价于（ ）。A:e==0 B:e!=1 C:e!=0 D:-e A: e==0 B: e!=1 C: e!=0 D: -e
语句while（!e）；中条件!e等价于（ ）。A:e==0 B:e!=1 C:e!=0 D:-e A: e==0 B: e!=1 C: e!=0 D: -e
以下哪个文法存在二义性（ ） A: E → E+T | TT → T*F | FF → (E) | i B: S → aSaS → bSbS → ε C: E → E + E E → E * E E → ( E ) E → i D: S → aSS → bSS → ε
以下哪个文法存在二义性（ ） A: E → E+T | TT → T*F | FF → (E) | i B: S → aSaS → bSbS → ε C: E → E + E E → E * E E → ( E ) E → i D: S → aSS → bSS → ε
三人争产问题中哪种情况下三人平分财产（ ）。 A: E=E**时 B: E≤E*时 C: E*<E≤E**时 D: E>E**时
三人争产问题中哪种情况下三人平分财产（ ）。 A: E=E**时 B: E≤E*时 C: E*<E≤E**时 D: E>E**时