首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
判断下列反常积分的敛散性，如果是收敛的求出反常积分值．
查看本题答案
包含此试题的试卷
国家统考科目《问答集》真题及答案
点击查看
你可能感兴趣的试题
函数fx在[1+∞上连续且反常积分[*]收敛并满足[*]则函数fx的表达式是______．
函数fx在[1+∞上连续且反常积分收敛并满足 则函数fx的表达式是______．
判断下列反常积分的敛散性如果是收敛的要求出反常积分的值．
判断下列反常积分的敛散性如果是收敛的求出反常积分值．[*]
反常积分
收敛于0
收敛于
ln3
收敛于
ln2
发散
已知k＞0对于反常积分的敛散情况下面判断正确的是______
当k＞1时，积分发散．
当k≤1时，积分发散．
敛散性与k无关，必收敛．
敛散性与k无关，必发散．
设函数fx在[1+∞上连续且反常积分[*]收敛并满足[*][*]则函数fx的表达式是______．
设
(A) 为反常积分，且发散．
(B) 为反常积分，且收敛．
(C) 不是反常积分，且其值为10．
(D) 不是反常积分，且其值为．
设mn均是正整数则反常积分的收敛性
仅与m的取值有关．
仅与n的取值有关．
与m，n的取值都有关．
与m，n的取值都无关．
判断下列反常积分的敛散性如果是收敛的要求出反常积分的值．
下列反常积分① 中收敛的是
①②
①③
②④
③④
设mn是正整数则反常积分的收敛性
仅与m的取值有关
仅与n有关
与m，n取值有关
与m，n取值都无关
设常数a∈-∞+∞讨论反常积分的敛散性．又当上述反常积分收敛时记确定当a取何值时Ia取得最小值．
计算下列反常积分广义积分的值．[*]
下列反常积分发散的是．
A
B
C
D
设a＞0p为常数则反常积分
收敛（对任何p）
发散（对任何p）
当p≤1时收敛，当p＞1时发散
当p≤1时发散，当p＞1时收敛
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
(A) 1个．
(B) 2个．
(C) 3个．
(D) 4个．
反常积分
收敛于π
收敛于π/2
收敛于π/4
发散
设常数a∈-∞+∞讨论反常积分的敛散性．又当上述反常积分收敛时记确定当a取何值时Ia取得最小值．
设ab为常数则反常积分
收敛（对任何q）
发散（对任何q）
当q＜1时收敛，当q≥1时发散
当q＜1时发散，当q≥1时收敛
热门试题
更多
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_________________.
设Fx是函数fx在区间I上的原函数则
下列计算
设fex=x则函数fx在区间[12]上的平均值等于
若的原函数Fx的表达式中Ⅰ不包含对数函数Ⅱ不含反正切函数则其中的常数a和b分别满足条件______．
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
设x≠0则∫fxdx______．
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.
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
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.
热门题库
更多
高考历史
国家统考科目
香港法概论
反间谍法
__学
合同法
证据学
民事诉讼法学
民法学
刑法学
消费者权益保护法
法理学
竞争法
国际公法
国际经济法
农村政策法规
ln3 收敛于
ln2 发散
湘公网安备 43130202000226号