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求解下列各题 8x-1≥9x+5
试一试解下列方程 4x2+8x-20=0
试一试指出下列各题的运算顺序6÷3×2．
试解下列各题计算导数[*]
船舶出船闸操纵下列正确的是
先解上风舷首缆
先解下风舷首缆
先解上风舷尾缆
先解下风舷尾缆
某测验共6道题50名被试在该测验的各题得分的方差是0.750.810.790.830.850.
求解下列各题
解下列各题①．②．
关于比内测验的施测正确的说法是
主试要熟读各题指导语
主试可以替被试填简历
可以不签主试的姓名
开始题目根据被试年龄确定
船舶出船闸操纵关于尾缆的解缆下列正确的是
先解上风舷尾缆，后解下风舷尾缆
先解下风舷尾缆，后解上风舷尾缆
先解上风舷首缆，后解下风舷首缆
先解下风舷首缆，后解下风舷首缆
试一试指出下列各题的运算顺序17-8÷-2+4×-3
解下列关于x的方程:x+3x－1=5
试解下列各题 利用积分性质比较的大小．
求解下列各题
试一试解下列方程 x2+2x=5
某测验共6道题50名被试在该测验的各题得分的方差是0.750.810.790.830.850.
求解下列各题 5x-0.3=3x-1.2-1.8-8x
某测验共6道题50名被试在该测验的各题得分的方差是0.750.810.790.830.850.
试解下列各题利用积分性质比较[*]的大小．
试一试解下列方程 x2+6x+9=2
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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_________________.
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
已知fx的一个原函数为则∫xf’2xdx=______．
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.
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.
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
若
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
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
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