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下列函数不可积的是
WhataccountsforthegreatoutburstofmajorinventionsinearlyAmerica―breakthroughssuchasthetelegraphthesteamboatandtheweavingmachine AmongthemanyshapingfactorsIwouldsingleoutthecountry’’sexcellentelementaryschools;alaborforcethatwelcomedthenewtechnology;thepracticeofgivingpremiumstoinventors;andabovealltheAmericangeniusfornonverbalspatialthinkingaboutthingstechnological. WhymentiontheelementaryschoolsBecausethankstotheseschoolsourearlymechanicespeciallyintheNewEnglandandMiddleAtlanticstatesweregenerallyliterateandathomeinarithmeticandinsomeaspectsofgeometryandtrigonometry. AcuteforeignobserversrelatedAmericanadaptivenessandinventivenesstothiseducationaladvantage.AsamemberofaBritishcommissionvisitingherein1853reportedWithamindpreparedbythoroughschooldisciplinetheAmericanboydevelopsrapidlyintotheskilledworkman. Afurtherstimulustoinventioncamefromthepremiumsystemwhichprecededourpatentsystemandforyearsranparallelwithit.Thisapproachoriginatedabroadofferedinventorsmedalscashprizesandotherincentives. IntheUnitedStatesmultitudesofpremiumsfornewdeviceswereawardedatcountryfairsandattheindustrialfairsinmajorcities.Americansflockedtothesefairstoadmirethenewmachinesandthustorenewtheirfaithinthebeneficenceoftechnologicaladvance. GiventhisoptimisticapproachtotechnologicalinnovationtheAmericanworkertookreadilytothatspecialkindofnonverbalthinkingrequiredinmechanicaltechnology.AsEugeneFergusonhaspointedoutAtechnologistthinksaboutobjectsthatcannotbereducedtounambiguousverbaldescriptions;theyaredealtwithinhismindbyavisualnonverbalprocess...Thedesignerandtheinventor...areabletoassembleandmanipulateintheirmindsdevicesthatasyetdonotexist. Thisnonverbalspatialthinkingcanbejustascreativeaspaintingandwriting.RobertFultononcewroteThemechanicshouldsitdownamongleversscrewswedgeswheelsetc.likeapoetamongthelettersofthealphabetconsideringthemasanexhibitionofhisthoughtsinwhichanewarrangementtransmitsanewidea. Whenalltheseshapingforces―schoolsopenattitudesthepremiumsystemageniusforspatialthinking―interactedwithoneanotherontherichU.S.mainlandtheyproducedthatAmericancharacteristicemulation.Todaythatwordimpliesmereimitation.Butinearliertimesitmeantafriendlybutcompetitivestrivingforfameandexcellence. AccordingtotheauthorthegreatoutburstofmajorinventionsinearlyAmericawasinalargepartdueto_________________.
Vitaminsareorganiccompoundsnecessaryinsmallamountsinthedietforthenormalgrowthandmaintenanceoflifeofanimalsincludingman. Theydonotprovideenergy________dotheyconstructorbuildanypartofthebody.Theyareneededfor________foodsintoenergyandbodymaintenance.Therearethirteenormoreofthemandif________ismissingadeficiencydiseasebecomes________. Vitaminsaresimilarbecausetheyaremadeofthesameelements―usuallycarbonhydrogenoxygenand______nitrogen.Theyaredifferent______theirelementsarearrangeddifferentlyandeachvitamin______oneormorespecificfunctionsinthebody. ________enoughvitaminsisessentialtolifealthoughthebodyhasnonutritionalusefor________vitamins.Manypeople________believeinbeingonthesafesideandthustakeextravitamins.Howeverawell-balanceddietwillusuallymeetallthebody’’svitaminneeds.
Vitaminsareorganiccompoundsnecessaryinsmallamountsinthedietforthenormalgrowthandmaintenanceoflifeofanimalsincludingman. Theydonotprovideenergy________dotheyconstructorbuildanypartofthebody.Theyareneededfor________foodsintoenergyandbodymaintenance.Therearethirteenormoreofthemandif________ismissingadeficiencydiseasebecomes________. Vitaminsaresimilarbecausetheyaremadeofthesameelements―usuallycarbonhydrogenoxygenand______nitrogen.Theyaredifferent______theirelementsarearrangeddifferentlyandeachvitamin______oneormorespecificfunctionsinthebody. ________enoughvitaminsisessentialtolifealthoughthebodyhasnonutritionalusefor________vitamins.Manypeople________believeinbeingonthesafesideandthustakeextravitamins.Howeverawell-balanceddietwillusuallymeetallthebody’’svitaminneeds.Vitaminsareorganiccompoundsnecessaryinsmallamountsinthedietforthenormalgrowthandmaintenanceoflifeofanimalsincludingman. Theydonotprovideenergy________dotheyconstructorbuildanypartofthebody.Theyareneededfor________foodsintoenergyandbodymaintenance.Therearethirteenormoreofthemandif________ismissingadeficiencydiseasebecomes________. Vitaminsaresimilarbecausetheyaremadeofthesameelements―usuallycarbonhydrogenoxygenand______nitrogen.Theyaredifferent______theirelementsarearrangeddifferentlyandeachvitamin______oneormorespecificfunctionsinthebody. ________enoughvitaminsisessentialtolifealthoughthebodyhasnonutritionalusefor________vitamins.Manypeople________believeinbeingonthesafesideandthustakeextravitamins.Howeverawell-balanceddietwillusuallymeetallthebody’’svitaminneeds.
设Fx是函数fx在区间I上的原函数则
Vitaminsareorganiccompoundsnecessaryinsmallamountsinthedietforthenormalgrowthandmaintenanceoflifeofanimalsincludingman. Theydonotprovideenergy________dotheyconstructorbuildanypartofthebody.Theyareneededfor________foodsintoenergyandbodymaintenance.Therearethirteenormoreofthemandif________ismissingadeficiencydiseasebecomes________. Vitaminsaresimilarbecausetheyaremadeofthesameelements―usuallycarbonhydrogenoxygenand______nitrogen.Theyaredifferent______theirelementsarearrangeddifferentlyandeachvitamin______oneormorespecificfunctionsinthebody. ________enoughvitaminsisessentialtolifealthoughthebodyhasnonutritionalusefor________vitamins.Manypeople________believeinbeingonthesafesideandthustakeextravitamins.Howeverawell-balanceddietwillusuallymeetallthebody’’svitaminneeds.
下列计算
设fex=x则函数fx在区间[12]上的平均值等于
Inlessthan30years’’timetheStarTrekholodeckwillbeareality.Directlinksbetweenthebrain’’snervoussystemandacomputerwillalsocreatefullsensoryvirtualenvironmentsallowingvirtualvacationslikethoseinthefilmTotalRecall. 71.Therewillbetelevisionchatshowshostedbyrobotsandcarswithpollutionmonitorsthatwilldisablethemwhentheyoffend.72.Childrenwillplaywithdollsequippedwithpersonalitychipscomputerswithin-builtpersonalitieswillberegardedasworkmatesratherthantoolsrelaxationwillbeinfrontofsmell-televisionanddigitalagewillhavearrived. AccordingtoBT’’sfuturologistIanPearsontheseareamongthedevelopmentsscheduledforthefirstfewdecadesofthenewmillenniumaperiodof1000yearswhensupercomputerswilldramaticallyaccelerateprogressinallareasoflife. 73.Pearsonhaspiecedtogethertheworkofhundredsofresearchersaroundtheworldtoproduceauniquemillenniumtechnologycalendarthatgivesthelatestdateswhenwecanexpecthundredsorkeybreakthroughsanddiscoveriestotakeplace.Someofthebiggestdevelopmentswillbeinmedicineincludinganextendedlifeexpectancyanddozensofartificialorganscomingintousebetweennowand2040. Pearsonalsopredictsabreakthroughincomputer-humanlinks.BylinkingdirectlytoournervoussystemcomputerscouldpickupwhatwefeelandhopefullysimulatefeelingtoosothatwecanstarttodevelopfullsensoryenvironmentsratherliketheholidaysinTotalRecallortheStarTrekholodeckhesays.74.ButthatPearsonpointsoutisonlythestartofman-machineintegration:Itwillbethebeginningofthelongprocessofintegrationthatwillultimatelyleadtoafullyelectronichumanbeforetheendofthenextcentury. ThroughhisresearchPearsonisabletoputdatestomostofthebreakthroughsthatcanbepredicted.Howevertherearestillnoforecastsforwhenfaster-that-lighttravelwillbeavailableorwhenhumancloningwillbeperfectedorwhentimetravelwillbepossible.Buthedoesexpectsocialproblemsasaresultoftechnologicaladvances.Aboominneighborhoodsurveillancecameraswillforexamplecauseproblemsin2010whilethearrivalofsyntheticlifelikerobotswillmeanpeoplemaynotbeabletodistinguishbetweentheirhumanfriendsandthedroids.75.Andhomeapplianceswillalsobecomesosmartthatcontrollingandoperatingthemwillresultinthebreakoutofanewpsychologicaldisorder--kitchenrage.
Scienceinpracticedependsfarlessontheexperimentsitpreparesthanonthepreparednessofthemindsofthemenwhowatchtheexperiments.SirIsaacNewtonsupposedlydiscoveredgravitythroughthefallofanapple.Appleshadbeenfallinginmanyplacesforcenturiesandthousandsofpeoplehadseenthemfall.ButNewtonforyearshadbeencuriousaboutthecauseoftheorbitalmotionofthemoonandplanets.WhatkepttheminplaceWhydidn’’ttheyfalloutoftheskyThefactthattheapplefelldowntowardtheearthandnotupintothetreeansweredthequestionhehadbeenaskinghimselfaboutthoselargerfruitsoftheheavensthemoonandtheplanets. HowmanymenwouldhaveconsideredthepossibilityofanapplefallingupintothetreeNewtondidbecausehewasnottryingtopredictanything.Hewasjustwondering.Hismindwasreadyfortheunpredictable.Unpredictabilityispartoftheessentialnatureofresearch.Ifyoudon’’thaveunpredictablethingsyoudon’’thaveresearch.Scientiststendtoforgetthiswhenwritingtheircutanddriedreportsforthetechnicaljournalsbuthistoryisfilledwithexamplesofit. Intalkingtosomescientistsparticularlyyoungeronesyoumightgathertheimpressionthattheyfindthescientificmethodasubstituteforimaginativethought.I’’veattendedresearchconferenceswhereascientisthasbeenaskedwhathethinksabouttheadvisabilityofcontinuingacertainexperiment.Thescientisthasfrownedlookedatthegraphsandsaidthedataarestillinconclusive.WeknowthatthemenfromthebudgetofficehavesaidbutwhatdoyouthinkIsitworthwhilegoingonWhatdoyouthinkwemightexpectThescientisthasbeenshockedathavingevenbeenaskedtospeculate. Whatthisamountstoofcourseisthatthescientisthasbecomethevictimofhisownwritings.Hehasputforwardunquestionedclaimssoconsistentlythathenotonlybelievesthemhimselfbuthasconvincedindustrialandbusinessmanagementthattheyaretrue.Ifexperimentsareplannedandcarriedoutaccordingtoplanasfaithfullyasthereportsinthesciencejournalsindicatethenitisperfectlylogicalformanagementtoexpectresearchtoproduceresultsmeasurableindollarsandcents.Itisentirelyreasonableforauditorstobelievethatscientistswhoknowexactlywheretheyaregoingandhowtheywillgetthereshouldnotbedistractedbythenecessityofkeepingoneeyeonthecashregisterwhiletheothereyeisonthemicroscope.Norifregularityandconformitytoastandardpatternareasdesirabletothescientistasthewritingofhispaperswouldappeartoreflectismanagementtobeblamedfordiscriminatingagainsttheoddballsamongresearchersinfavorofmoreconventionalthinkerswhoworkwellwiththeteam. Itseemsthatsomeyoungscientists_______________.
Scienceinpracticedependsfarlessontheexperimentsitpreparesthanonthepreparednessofthemindsofthemenwhowatchtheexperiments.SirIsaacNewtonsupposedlydiscoveredgravitythroughthefallofanapple.Appleshadbeenfallinginmanyplacesforcenturiesandthousandsofpeoplehadseenthemfall.ButNewtonforyearshadbeencuriousaboutthecauseoftheorbitalmotionofthemoonandplanets.WhatkepttheminplaceWhydidn’’ttheyfalloutoftheskyThefactthattheapplefelldowntowardtheearthandnotupintothetreeansweredthequestionhehadbeenaskinghimselfaboutthoselargerfruitsoftheheavensthemoonandtheplanets. HowmanymenwouldhaveconsideredthepossibilityofanapplefallingupintothetreeNewtondidbecausehewasnottryingtopredictanything.Hewasjustwondering.Hismindwasreadyfortheunpredictable.Unpredictabilityispartoftheessentialnatureofresearch.Ifyoudon’’thaveunpredictablethingsyoudon’’thaveresearch.Scientiststendtoforgetthiswhenwritingtheircutanddriedreportsforthetechnicaljournalsbuthistoryisfilledwithexamplesofit. Intalkingtosomescientistsparticularlyyoungeronesyoumightgathertheimpressionthattheyfindthescientificmethodasubstituteforimaginativethought.I’’veattendedresearchconferenceswhereascientisthasbeenaskedwhathethinksabouttheadvisabilityofcontinuingacertainexperiment.Thescientisthasfrownedlookedatthegraphsandsaidthedataarestillinconclusive.WeknowthatthemenfromthebudgetofficehavesaidbutwhatdoyouthinkIsitworthwhilegoingonWhatdoyouthinkwemightexpectThescientisthasbeenshockedathavingevenbeenaskedtospeculate. Whatthisamountstoofcourseisthatthescientisthasbecomethevictimofhisownwritings.Hehasputforwardunquestionedclaimssoconsistentlythathenotonlybelievesthemhimselfbuthasconvincedindustrialandbusinessmanagementthattheyaretrue.Ifexperimentsareplannedandcarriedoutaccordingtoplanasfaithfullyasthereportsinthesciencejournalsindicatethenitisperfectlylogicalformanagementtoexpectresearchtoproduceresultsmeasurableindollarsandcents.Itisentirelyreasonableforauditorstobelievethatscientistswhoknowexactlywheretheyaregoingandhowtheywillgetthereshouldnotbedistractedbythenecessityofkeepingoneeyeonthecashregisterwhiletheothereyeisonthemicroscope.Norifregularityandconformitytoastandardpatternareasdesirabletothescientistasthewritingofhispaperswouldappeartoreflectismanagementtobeblamedfordiscriminatingagainsttheoddballsamongresearchersinfavorofmoreconventionalthinkerswhoworkwellwiththeteam. TheauthorwantstoprovewiththeexampleofIsaacNewtonthat____________.
It’’safunnythinghappiness.Peoplerefertoitassomethingtheywantsomethingmissingasifitcouldbesecurediftheyonlyknewwheretofindit.Lackofitisblamedonpastrelationshipsandhopeforitplacedonfuturelovers.Desireforitbecomesarestlessquest.Yetoverandagainintherapyitisclearthatahungrypursuitfortheillusivestateofhappinessonlyendsinfrustrationandyetmoreunhappiness. WhenIaskamanwho’’sjustturned40andwantstotrypsychotherapytotellmeaboutthedisappointmentshementionshereelsoffalist:aloveaffairthatlostitszest;aworkprojectruinedbyacolleague;aholidayspoiledbytheweather;aplanhaltedbyillhealth.Allwerepotentialroutestohappiness.Anditisthisendlessfeelingofthingsbeingspoiltthatmakeshimfeelletdownbylifeandunhappy. Hetellsmethathehadbeenawillfulchild.Hewashesaysspoiltrottenbyverylovingparents.Theyhadsufferedmuchhardshipintheirownlivesandwhenhardworkandgoodluckmadethemwellofftheydecidedthathetheironlysonwouldhavealltheyhadlackedandmore. Hehadwantedfornothing.Yetthiscamewithacost.Forhavingeverythingonaplatebeforehehadevendevelopedanappetitehadrobbedhimofthechancetoreachandstruggleforsomethingmeaningfulandofhisveryown.Therehadneverbeenanemptyspacehehadenjoyedworkingtofill.Littlewonderhewasunabletoremainattachedtoanythingoranyoneafterfrustrationsetin.Workingthroughdifficultysimplyhadn’’teverbeenaskedofhim. Whilehopefullyaby-productofdevelopingemotionalmaturityhappinesswasnotItoldhimaspecifictherapeuticaim.Buttherapycouldofferthechallengetostaywithandsograduallyunderstandthemeaningofhisunhappinessratherthanboltingwhenthegoinggotrough.Thenotionthatwecanuncoverameaningwithinoursufferingsupportsthewholetherapeuticventure.Byworkingtowardsunderstandingthereasonsforhisdisappointmentsthismanhadthechancetobeginreshapinghisownlifejourney.Thiswasunlikelytogivehimhappinessasagivenconstantbutcouldenablehimtodevelopsomethingfarmoreimportant.AsC.G.JungthefounderofAnalyticalPsychologysaid:Theprincipalaimofpsychotherapyisnottotransportthepatienttoanimpossiblestateofhappinessbuttohelphimacquiresteadfastnessandphilosophicpatienceinthefaceofsuffering.Lifedemandsforitscompletionandfulfillmentabalancebetweenjoyandsorrow. Thepatient’’sunhappinessresultsprimarilyfromhis
WhataccountsforthegreatoutburstofmajorinventionsinearlyAmerica―breakthroughssuchasthetelegraphthesteamboatandtheweavingmachine AmongthemanyshapingfactorsIwouldsingleoutthecountry’’sexcellentelementaryschools;alaborforcethatwelcomedthenewtechnology;thepracticeofgivingpremiumstoinventors;andabovealltheAmericangeniusfornonverbalspatialthinkingaboutthingstechnological. WhymentiontheelementaryschoolsBecausethankstotheseschoolsourearlymechanicespeciallyintheNewEnglandandMiddleAtlanticstatesweregenerallyliterateandathomeinarithmeticandinsomeaspectsofgeometryandtrigonometry. AcuteforeignobserversrelatedAmericanadaptivenessandinventivenesstothiseducationaladvantage.AsamemberofaBritishcommissionvisitingherein1853reportedWithamindpreparedbythoroughschooldisciplinetheAmericanboydevelopsrapidlyintotheskilledworkman. Afurtherstimulustoinventioncamefromthepremiumsystemwhichprecededourpatentsystemandforyearsranparallelwithit.Thisapproachoriginatedabroadofferedinventorsmedalscashprizesandotherincentives. IntheUnitedStatesmultitudesofpremiumsfornewdeviceswereawardedatcountryfairsandattheindustrialfairsinmajorcities.Americansflockedtothesefairstoadmirethenewmachinesandthustorenewtheirfaithinthebeneficenceoftechnologicaladvance. GiventhisoptimisticapproachtotechnologicalinnovationtheAmericanworkertookreadilytothatspecialkindofnonverbalthinkingrequiredinmechanicaltechnology.AsEugeneFergusonhaspointedoutAtechnologistthinksaboutobjectsthatcannotbereducedtounambiguousverbaldescriptions;theyaredealtwithinhismindbyavisualnonverbalprocess...Thedesignerandtheinventor...areabletoassembleandmanipulateintheirmindsdevicesthatasyetdonotexist. Thisnonverbalspatialthinkingcanbejustascreativeaspaintingandwriting.RobertFultononcewroteThemechanicshouldsitdownamongleversscrewswedgeswheelsetc.likeapoetamongthelettersofthealphabetconsideringthemasanexhibitionofhisthoughtsinwhichanewarrangementtransmitsanewidea. Whenalltheseshapingforces―schoolsopenattitudesthepremiumsystemageniusforspatialthinking―interactedwithoneanotherontherichU.S.mainlandtheyproducedthatAmericancharacteristicemulation.Todaythatwordimpliesmereimitation.Butinearliertimesitmeantafriendlybutcompetitivestrivingforfameandexcellence. Atechnologistcanbecomparedtoanartistbecause_________________.
Youwillbereceivingyourbachelor’’sdegreeinMarketingandarelookingforajob.Writealettertoanetworkcompanymanageraccordingtoyourfriend’’sadviceinwhichyoushouldstate 1thepersonofferingyouadvice 2yourstudyandexperienceand 3reasonsofyourinterestinthecompany. Youshouldwriteabout100wordsonANSWERSHEET2.Donotsignyournameattheendoftheletter.UseLiMinginstead.Youdonotneedtowritetheaddress10points.
MoneyspentonadvertisingismoneyspentaswellasanyIknowof.Itservesdirectlytoassistarapiddistributionofgoodsatreasonablepricestherebyestablishingafirmhomemarketandsomakingitpossibletoprovideforexportatcompetitiveprices.Bydrawingattentiontonewideasithelpsenormouslytoraisestandardsofliving.Byhelpingtoincreasedemanditensuresanincreasedneedforlabourandisthereforeaneffectivewaytofightunemployment.Itlowersthecostsofmanyservices:withoutadvertisementsyourdailynewspaperwouldcostfourtimesasmuchthepriceofyourtelevisionlicencewouldneedtobedoubledandtravelbybusortubewouldcost20percentmore. Andperhapsmostimportantofalladvertisingprovidesaguaranteeofreasonablevalueintheproductsandservicesyoubuy.Apartfromthefactthattwenty-sevenActsofParliamentgovernthetermsofadvertisingnoregularadvertiserdarepromoteaproductthatfailstoliveuptothepromiseofhisadvertisements.Hemightfoolsomepeopleforalittlewhilethroughmisleadingadvertising.Hewillnotdosoforlongformercifullythepublichasthegoodsensenottobuytheinferiorarticlemorethanonce.IfyouseeanarticleconsistentlyadvertiseditisthesurestproofIknowthatthearticledoeswhatisclaimedforitandthatitrepresentsgoodvalue. AdvertisingdoesmoreforthematerialbenefitofthecommunitythananyotherforceIcanthinkof. ThereisonepointIfeelIoughttotouchon.RecentlyIheardawell-knowntelevisionpersonalitydeclarethathewasagainstadvertisingbecauseitpersuadesratherthaninforms.Hewasdrawingexcessivelyfinedistinctions.Ofcourseadvertisingseekstopersuade. Ifitsmessagewereconfinedmerelytoinformation―andthatinitselfwouldbedifficultifnotimpossibletoachieveforevenadetailsuchasthechoiceofthecolourofashirtissubtletypersuasiveadvertisingwouldbesoboringthatnoonewouldpayanyattention.Butperhapsthatiswhatthewell-knowntelevisionpersonalitywants. Theauthordeemsthatthewell-knownTVpersonalityis_______________.
MoneyspentonadvertisingismoneyspentaswellasanyIknowof.Itservesdirectlytoassistarapiddistributionofgoodsatreasonablepricestherebyestablishingafirmhomemarketandsomakingitpossibletoprovideforexportatcompetitiveprices.Bydrawingattentiontonewideasithelpsenormouslytoraisestandardsofliving.Byhelpingtoincreasedemanditensuresanincreasedneedforlabourandisthereforeaneffectivewaytofightunemployment.Itlowersthecostsofmanyservices:withoutadvertisementsyourdailynewspaperwouldcostfourtimesasmuchthepriceofyourtelevisionlicencewouldneedtobedoubledandtravelbybusortubewouldcost20percentmore. Andperhapsmostimportantofalladvertisingprovidesaguaranteeofreasonablevalueintheproductsandservicesyoubuy.Apartfromthefactthattwenty-sevenActsofParliamentgovernthetermsofadvertisingnoregularadvertiserdarepromoteaproductthatfailstoliveuptothepromiseofhisadvertisements.Hemightfoolsomepeopleforalittlewhilethroughmisleadingadvertising.Hewillnotdosoforlongformercifullythepublichasthegoodsensenottobuytheinferiorarticlemorethanonce.IfyouseeanarticleconsistentlyadvertiseditisthesurestproofIknowthatthearticledoeswhatisclaimedforitandthatitrepresentsgoodvalue. AdvertisingdoesmoreforthematerialbenefitofthecommunitythananyotherforceIcanthinkof. ThereisonepointIfeelIoughttotouchon.RecentlyIheardawell-knowntelevisionpersonalitydeclarethathewasagainstadvertisingbecauseitpersuadesratherthaninforms.Hewasdrawingexcessivelyfinedistinctions.Ofcourseadvertisingseekstopersuade. Ifitsmessagewereconfinedmerelytoinformation―andthatinitselfwouldbedifficultifnotimpossibletoachieveforevenadetailsuchasthechoiceofthecolourofashirtissubtletypersuasiveadvertisingwouldbesoboringthatnoonewouldpayanyattention.Butperhapsthatiswhatthewell-knowntelevisionpersonalitywants. Bythefirstsentenceofthepassagetheauthormeansthat________________.
下列结论不正确的是
Inlessthan30years’’timetheStarTrekholodeckwillbeareality.Directlinksbetweenthebrain’’snervoussystemandacomputerwillalsocreatefullsensoryvirtualenvironmentsallowingvirtualvacationslikethoseinthefilmTotalRecall. 71.Therewillbetelevisionchatshowshostedbyrobotsandcarswithpollutionmonitorsthatwilldisablethemwhentheyoffend.72.Childrenwillplaywithdollsequippedwithpersonalitychipscomputerswithin-builtpersonalitieswillberegardedasworkmatesratherthantoolsrelaxationwillbeinfrontofsmell-televisionanddigitalagewillhavearrived. AccordingtoBT’’sfuturologistIanPearsontheseareamongthedevelopmentsscheduledforthefirstfewdecadesofthenewmillenniumaperiodof1000yearswhensupercomputerswilldramaticallyaccelerateprogressinallareasoflife. 73.Pearsonhaspiecedtogethertheworkofhundredsofresearchersaroundtheworldtoproduceauniquemillenniumtechnologycalendarthatgivesthelatestdateswhenwecanexpecthundredsorkeybreakthroughsanddiscoveriestotakeplace.Someofthebiggestdevelopmentswillbeinmedicineincludinganextendedlifeexpectancyanddozensofartificialorganscomingintousebetweennowand2040. Pearsonalsopredictsabreakthroughincomputer-humanlinks.BylinkingdirectlytoournervoussystemcomputerscouldpickupwhatwefeelandhopefullysimulatefeelingtoosothatwecanstarttodevelopfullsensoryenvironmentsratherliketheholidaysinTotalRecallortheStarTrekholodeckhesays.74.ButthatPearsonpointsoutisonlythestartofman-machineintegration:Itwillbethebeginningofthelongprocessofintegrationthatwillultimatelyleadtoafullyelectronichumanbeforetheendofthenextcentury. ThroughhisresearchPearsonisabletoputdatestomostofthebreakthroughsthatcanbepredicted.Howevertherearestillnoforecastsforwhenfaster-that-lighttravelwillbeavailableorwhenhumancloningwillbeperfectedorwhentimetravelwillbepossible.Buthedoesexpectsocialproblemsasaresultoftechnologicaladvances.Aboominneighborhoodsurveillancecameraswillforexamplecauseproblemsin2010whilethearrivalofsyntheticlifelikerobotswillmeanpeoplemaynotbeabletodistinguishbetweentheirhumanfriendsandthedroids.75.Andhomeapplianceswillalsobecomesosmartthatcontrollingandoperatingthemwillresultinthebreakoutofanewpsychologicaldisorder--kitchenrage.
Vitaminsareorganiccompoundsnecessaryinsmallamountsinthedietforthenormalgrowthandmaintenanceoflifeofanimalsincludingman. Theydonotprovideenergy________dotheyconstructorbuildanypartofthebody.Theyareneededfor________foodsintoenergyandbodymaintenance.Therearethirteenormoreofthemandif________ismissingadeficiencydiseasebecomes________. Vitaminsaresimilarbecausetheyaremadeofthesameelements―usuallycarbonhydrogenoxygenand______nitrogen.Theyaredifferent______theirelementsarearrangeddifferentlyandeachvitamin______oneormorespecificfunctionsinthebody. ________enoughvitaminsisessentialtolifealthoughthebodyhasnonutritionalusefor________vitamins.Manypeople________believeinbeingonthesafesideandthustakeextravitamins.Howeverawell-balanceddietwillusuallymeetallthebody’’svitaminneeds.
设Fx是函数fx=max{xx2}的一个原函数．则
下列结论正确的是
下列等式或结论正确的是
下列命题①设∫fxdx=Fx+C则对任意函数gx有∫f[gx]dx=F[gx]+C ②设函数fx在某区间上连续可导且f’x≠0．又f-1x是其反函数且∫fxdx=Fx+C则 ∫f-1xdx=xf-1x-F[f-1x]+C ③设∫fxdx=Fx+Cx∈-∞+∞常数a≠0则∫faxdx=Fax+C． ④设∫fxdx=Fx+Cx∈-∞+∞则 中正确的是
Vitaminsareorganiccompoundsnecessaryinsmallamountsinthedietforthenormalgrowthandmaintenanceoflifeofanimalsincludingman. Theydonotprovideenergy________dotheyconstructorbuildanypartofthebody.Theyareneededfor________foodsintoenergyandbodymaintenance.Therearethirteenormoreofthemandif________ismissingadeficiencydiseasebecomes________. Vitaminsaresimilarbecausetheyaremadeofthesameelements―usuallycarbonhydrogenoxygenand______nitrogen.Theyaredifferent______theirelementsarearrangeddifferentlyandeachvitamin______oneormorespecificfunctionsinthebody. ________enoughvitaminsisessentialtolifealthoughthebodyhasnonutritionalusefor________vitamins.Manypeople________believeinbeingonthesafesideandthustakeextravitamins.Howeverawell-balanceddietwillusuallymeetallthebody’’svitaminneeds.
下列命题不正确的是
It’’safunnythinghappiness.Peoplerefertoitassomethingtheywantsomethingmissingasifitcouldbesecurediftheyonlyknewwheretofindit.Lackofitisblamedonpastrelationshipsandhopeforitplacedonfuturelovers.Desireforitbecomesarestlessquest.Yetoverandagainintherapyitisclearthatahungrypursuitfortheillusivestateofhappinessonlyendsinfrustrationandyetmoreunhappiness. WhenIaskamanwho’’sjustturned40andwantstotrypsychotherapytotellmeaboutthedisappointmentshementionshereelsoffalist:aloveaffairthatlostitszest;aworkprojectruinedbyacolleague;aholidayspoiledbytheweather;aplanhaltedbyillhealth.Allwerepotentialroutestohappiness.Anditisthisendlessfeelingofthingsbeingspoiltthatmakeshimfeelletdownbylifeandunhappy. Hetellsmethathehadbeenawillfulchild.Hewashesaysspoiltrottenbyverylovingparents.Theyhadsufferedmuchhardshipintheirownlivesandwhenhardworkandgoodluckmadethemwellofftheydecidedthathetheironlysonwouldhavealltheyhadlackedandmore. Hehadwantedfornothing.Yetthiscamewithacost.Forhavingeverythingonaplatebeforehehadevendevelopedanappetitehadrobbedhimofthechancetoreachandstruggleforsomethingmeaningfulandofhisveryown.Therehadneverbeenanemptyspacehehadenjoyedworkingtofill.Littlewonderhewasunabletoremainattachedtoanythingoranyoneafterfrustrationsetin.Workingthroughdifficultysimplyhadn’’teverbeenaskedofhim. Whilehopefullyaby-productofdevelopingemotionalmaturityhappinesswasnotItoldhimaspecifictherapeuticaim.Buttherapycouldofferthechallengetostaywithandsograduallyunderstandthemeaningofhisunhappinessratherthanboltingwhenthegoinggotrough.Thenotionthatwecanuncoverameaningwithinoursufferingsupportsthewholetherapeuticventure.Byworkingtowardsunderstandingthereasonsforhisdisappointmentsthismanhadthechancetobeginreshapinghisownlifejourney.Thiswasunlikelytogivehimhappinessasagivenconstantbutcouldenablehimtodevelopsomethingfarmoreimportant.AsC.G.JungthefounderofAnalyticalPsychologysaid:Theprincipalaimofpsychotherapyisnottotransportthepatienttoanimpossiblestateofhappinessbuttohelphimacquiresteadfastnessandphilosophicpatienceinthefaceofsuffering.Lifedemandsforitscompletionandfulfillmentabalancebetweenjoyandsorrow. Itisausualeasewithhappinessthat
下列关于反常积分的命题①设fx是-∞+∞上的连续奇函数则②设fx在-∞+∞上连续且存在则必收敛且③若都发散则不能确定是否收敛④若都发散则不能确定是否收敛中是真命题的个数有
下列命题不正确的是
Therehasbeenadiscussionrecentlyontheissueinanewspaper.Writeanessaytothenewspaperto 1showyourunderstandingofthesymbolicmeaningofthepicturebelow 2giveaspecificexampleand 3giveyoursuggestionastothebestwaytoshowlove. Youshouldwriteabout200wordsonANSWERSHEET2.
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