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某小区有一长100m，宽80m的空地，现将其建成花园广场，设计图案如下图所示．阴影区域为绿化区（四块绿化区是全等的矩形），空白区域为活动区，且四周出口一样宽，宽度不小于50m，不大于60m．预计活动...
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某小区有一长100m宽80m的空地现将其建成花园广场设计图案如下图所示．阴影区域为绿化区四块绿化区
某小区有一长100m宽80m的空地现将其建成花园广场设计图案如下图所示．阴影区域为绿化区四块绿化区
某中学校园内有一长100m宽80m的长方形空地现将其建成花园广场设计图案如图7所示阴影区域为绿化区四
某小区有一长100m宽80m空地现将其建成花园广场设计图案如图阴影区域为绿化区四块绿化区是全等的矩形
某小区有一长100m宽80m的空地现将其建成花园广场设计图案如下图所示．阴影区域为绿化区四块绿化区
某小区有一长100m宽80m的空地现将其建成花园广场设计图案如下图所示．阴影区域为绿化区四块绿化区是
某小区有一长100m宽80m的空地现将其建成花园广场设计图案如下图所示．阴影区域为绿化区四块绿化区
某小区有一长100m宽80m的空地现将其建成花园广场设计图案如下图所示．阴影区域为绿化区四块绿化区
某小区有一长100m宽80m的空地现将其建成花园广场设计图案如下图所示．阴影区域为绿化区四块绿化区
某小区有一长100m宽80m的空地现将其建成花园广场设计图案如下图所示．阴影区域为绿化区四块绿化区
某小区有一长100m宽80m的空地现将其建成花园广场设计图案如下图所示．阴影区域为绿化区四块绿化区
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感性知识分为感知和______两种水平理性知识包括概念和______两种形式．
Behindourhouseisthestartofafascinatingtrail小径.Thistrailisoneoftheoldroadsthatwindthroughuntoldmilesofforest.My36BeansandIwalkthetrailfrequently.NormallyBeanssniffsalongsidethetrailtofollowthesmellofadeertrackorexploresomecauseknownonlytohim. Beansisawhitedogquitehandsomeandverysmart.Henotonlyunderstandswhatwetellhimbutalsooftenmakessoundsasifheweretryingto37back. Onemorningwetookadifferentroutewhichledustoanunfamiliartrail.Iwassurethistrailwouldeventuallyleadustoourfamiliar38.Butno.Weseemedtobefaroffcourse.AftertwohoursIsuddenlyrealizedthatBeansprobably39thewayhome.SoIurged"Beanstakemehome."Herandownanewtrail.Butitmerelyledtoanintersection岔道口oftrails. Soonitbecame40thatweweregettingnowhere.Ibegantopicturetherestofthedayinthe41withoutfoodordrink.Wehadwalkedabouttenmiles.ButBeansseemedtotally42Thesniffingandexploringwasgoingwellforhim. Finallywe43acrossroadnearahighway.LadyLucksuggestedIshouldturnleft.Wedidand44reachedacottagebesideafield.Iknockedonthedoorandexplainedmysituationtoanoldman.Helaughedandthendroveushome. SinceouradventureI45thatBeansprobablyknewallalonghowtogethome. Hewasjusthavingtoomuchfanexploringnewtrails. 43
古希腊百科全书式的哲学家______首次提出了教育遵循自然的观点他倡导的和谐教育成为后来全面发展教育的思想渊源．
儿童多动综合征是小学生中最为常见的一种以注意力缺陷和活动过度为主要特征的行为障碍综合征其高峰发病年龄为．
Directions:TranslatethefollowingsentencesintoEnglish.没有仔细考虑之前不要做决定
Opinionpollsarenowbeginningtoshowthatwhoeveristoblameandwhateverhappensfromnowonhighunemploymentisprobablyheretostay.Thismeansweshallhavetofindwaysofsharingtheavailableemploymentmorewidely.Butweneedtogofurther.Wemustasksomefundamentalquestionsaboutthefuturework.ShouldwecontinuetotreatemploymentasthenormShouldwenotratherencouragemanywaysforself-respectingpeopletoworkShouldwenotcreateconditionsinwhichmanyofuscanworkforourselvesratherthanforanemployerShouldwenotaimtorevivethehouseholdandtheneighborhoodaswellasthefactoryandtheofficeascentersofproductionandworkTheindustrialagehasbeentheonlyperiodofhumanhistoryinwhichmostpeople’sworkhastakentheformofjobs.Theindustrialagemaynowbecomingtoanendandsomeofthechangesinworkpatternswhichitbroughtmayhavetobereversed.Thisseemsadauntingthought.Butinfactitcouldoffertheprospectofabetterfutureforwork.Universalemploymentasitshistoryshowshasnotmeanteconomicfreedom.Employmentbecamewidespreadwhentheenclosuresofthe17thand18thcenturiesmademanypeopledependentonpaidworkbydeprivingthemoftheuseofthelandandthusofthemeanstoprovidealivingforthemselves.Thenthefactorysystemdestroyedthecottageindustriesandremovedworkfrompeople’shomes.Laterastransportimprovedfirstbyrailandthenbyroadpeoplecommutedlongerdistancestotheirplacesofemploymentuntileventuallymanypeople’sworklostallconnectionwiththeirhomelivesandtheplacesinwhichtheylive.Meanwhileemploymentputwomenatadisadvantage.Inpreindustrialtimesmenandwomenhadsharedtheproductiveworkofthehouseholdandvillagecommunity.Nowitbecamecustomaryforthehusbandtogoouttopaidemploymentleavingtheunpaidworkofthehomeandfamiliestohiswife.Taxandbenefitregulationsstillassumethisnormtodayandrestrictmoreflexiblesharingofworkrolesbetweenthesexes.Itwasnotonlywomenwhoseworkstatussuffered.Asemploymentbecamethedominantformofworkyoungpeopleandoldpeoplewereexcluded—aproblemnowasmoreteenagersbecomefrustratedatschoolandmoreretiredpeoplewanttoliveactivelives.Allthismaynowhavetochange.Thetimehascertainlycometoswitchsomeeffortandresourcesawayfromtheidealistgoalcrea-tingjobsforalltotheurgentpracticaltaskofhelpingmanypeopletomanagewithoutfull-timejobs.WhichoftheibllowingisNOTsuggestedasapossiblemeanstocopewiththecurrentsituation9
长途旅行之后他们看起来很疲惫
Opinionpollsarenowbeginningtoshowthatwhoeveristoblameandwhateverhappensfromnowonhighunemploymentisprobablyheretostay.Thismeansweshallhavetofindwaysofsharingtheavailableemploymentmorewidely.Butweneedtogofurther.Wemustasksomefundamentalquestionsaboutthefuturework.ShouldwecontinuetotreatemploymentasthenormShouldwenotratherencouragemanywaysforself-respectingpeopletoworkShouldwenotcreateconditionsinwhichmanyofuscanworkforourselvesratherthanforanemployerShouldwenotaimtorevivethehouseholdandtheneighborhoodaswellasthefactoryandtheofficeascentersofproductionandworkTheindustrialagehasbeentheonlyperiodofhumanhistoryinwhichmostpeople’sworkhastakentheformofjobs.Theindustrialagemaynowbecomingtoanendandsomeofthechangesinworkpatternswhichitbroughtmayhavetobereversed.Thisseemsadauntingthought.Butinfactitcouldoffertheprospectofabetterfutureforwork.Universalemploymentasitshistoryshowshasnotmeanteconomicfreedom.Employmentbecamewidespreadwhentheenclosuresofthe17thand18thcenturiesmademanypeopledependentonpaidworkbydeprivingthemoftheuseofthelandandthusofthemeanstoprovidealivingforthemselves.Thenthefactorysystemdestroyedthecottageindustriesandremovedworkfrompeople’shomes.Laterastransportimprovedfirstbyrailandthenbyroadpeoplecommutedlongerdistancestotheirplacesofemploymentuntileventuallymanypeople’sworklostallconnectionwiththeirhomelivesandtheplacesinwhichtheylive.Meanwhileemploymentputwomenatadisadvantage.Inpreindustrialtimesmenandwomenhadsharedtheproductiveworkofthehouseholdandvillagecommunity.Nowitbecamecustomaryforthehusbandtogoouttopaidemploymentleavingtheunpaidworkofthehomeandfamiliestohiswife.Taxandbenefitregulationsstillassumethisnormtodayandrestrictmoreflexiblesharingofworkrolesbetweenthesexes.Itwasnotonlywomenwhoseworkstatussuffered.Asemploymentbecamethedominantformofworkyoungpeopleandoldpeoplewereexcluded—aproblemnowasmoreteenagersbecomefrustratedatschoolandmoreretiredpeoplewanttoliveactivelives.Allthismaynowhavetochange.Thetimehascertainlycometoswitchsomeeffortandresourcesawayfromtheidealistgoalcrea-tingjobsforalltotheurgentpracticaltaskofhelpingmanypeopletomanagewithoutfull-timejobs.Whatisthemainideaofthepassage
如图O中弦AD∥BCDA=DC∠AOC=160°则∠BCO等于
已知集合M=x|x2＜4N=x|x2-2x-3＜0则集合M∪N
Behindourhouseisthestartofafascinatingtrail小径.Thistrailisoneoftheoldroadsthatwindthroughuntoldmilesofforest.My36BeansandIwalkthetrailfrequently.NormallyBeanssniffsalongsidethetrailtofollowthesmellofadeertrackorexploresomecauseknownonlytohim. Beansisawhitedogquitehandsomeandverysmart.Henotonlyunderstandswhatwetellhimbutalsooftenmakessoundsasifheweretryingto37back. Onemorningwetookadifferentroutewhichledustoanunfamiliartrail.Iwassurethistrailwouldeventuallyleadustoourfamiliar38.Butno.Weseemedtobefaroffcourse.AftertwohoursIsuddenlyrealizedthatBeansprobably39thewayhome.SoIurged"Beanstakemehome."Herandownanewtrail.Butitmerelyledtoanintersection岔道口oftrails. Soonitbecame40thatweweregettingnowhere.Ibegantopicturetherestofthedayinthe41withoutfoodordrink.Wehadwalkedabouttenmiles.ButBeansseemedtotally42Thesniffingandexploringwasgoingwellforhim. Finallywe43acrossroadnearahighway.LadyLucksuggestedIshouldturnleft.Wedidand44reachedacottagebesideafield.Iknockedonthedoorandexplainedmysituationtoanoldman.Helaughedandthendroveushome. SinceouradventureI45thatBeansprobablyknewallalonghowtogethome. Hewasjusthavingtoomuchfanexploringnewtrails. 41
Opinionpollsarenowbeginningtoshowthatwhoeveristoblameandwhateverhappensfromnowonhighunemploymentisprobablyheretostay.Thismeansweshallhavetofindwaysofsharingtheavailableemploymentmorewidely.Butweneedtogofurther.Wemustasksomefundamentalquestionsaboutthefuturework.ShouldwecontinuetotreatemploymentasthenormShouldwenotratherencouragemanywaysforself-respectingpeopletoworkShouldwenotcreateconditionsinwhichmanyofuscanworkforourselvesratherthanforanemployerShouldwenotaimtorevivethehouseholdandtheneighborhoodaswellasthefactoryandtheofficeascentersofproductionandworkTheindustrialagehasbeentheonlyperiodofhumanhistoryinwhichmostpeople’sworkhastakentheformofjobs.Theindustrialagemaynowbecomingtoanendandsomeofthechangesinworkpatternswhichitbroughtmayhavetobereversed.Thisseemsadauntingthought.Butinfactitcouldoffertheprospectofabetterfutureforwork.Universalemploymentasitshistoryshowshasnotmeanteconomicfreedom.Employmentbecamewidespreadwhentheenclosuresofthe17thand18thcenturiesmademanypeopledependentonpaidworkbydeprivingthemoftheuseofthelandandthusofthemeanstoprovidealivingforthemselves.Thenthefactorysystemdestroyedthecottageindustriesandremovedworkfrompeople’shomes.Laterastransportimprovedfirstbyrailandthenbyroadpeoplecommutedlongerdistancestotheirplacesofemploymentuntileventuallymanypeople’sworklostallconnectionwiththeirhomelivesandtheplacesinwhichtheylive.Meanwhileemploymentputwomenatadisadvantage.Inpreindustrialtimesmenandwomenhadsharedtheproductiveworkofthehouseholdandvillagecommunity.Nowitbecamecustomaryforthehusbandtogoouttopaidemploymentleavingtheunpaidworkofthehomeandfamiliestohiswife.Taxandbenefitregulationsstillassumethisnormtodayandrestrictmoreflexiblesharingofworkrolesbetweenthesexes.Itwasnotonlywomenwhoseworkstatussuffered.Asemploymentbecamethedominantformofworkyoungpeopleandoldpeoplewereexcluded—aproblemnowasmoreteenagersbecomefrustratedatschoolandmoreretiredpeoplewanttoliveactivelives.Allthismaynowhavetochange.Thetimehascertainlycometoswitchsomeeffortandresourcesawayfromtheidealistgoalcrea-tingjobsforalltotheurgentpracticaltaskofhelpingmanypeopletomanagewithoutfull-timejobs.Itcanbeinferredfromthepassagethat______.
设二次函数fx=ax2+bx+cabc∈Ra≠0满足条件 1当x∈R时fx-4=f2-x且fx≥x 2当x∈02时 3fx在R上的最小值为0． 求最大的mm＞1使得存在t∈R只要x∈[1m]就有fx+t≤x．
化简的结果是.
假设美国某中学的学生明天来你校访问交流主题是高中生对文理科的选择你用英语写一篇发言稿向他们介绍你所做的选择并说明选择的理由注意①词数120左右②短文中不能出现与本人相关的信息参考词汇文科arts理科science
已知点O00点A4-1且它们到直线mx+m2y+6=0的距离相等那么m2可取值的集合为______
设椭圆的轨迹方程为焦点分别为F1-10F210直线lx=a2交x轴于点A且 1试求椭圆的方程 2过F1F2分别作互相垂直的两直线与椭圆分别交于DEMN四点如图所示试求四边形DMEN面积的最大值和最小值．
Behindourhouseisthestartofafascinatingtrail小径.Thistrailisoneoftheoldroadsthatwindthroughuntoldmilesofforest.My36BeansandIwalkthetrailfrequently.NormallyBeanssniffsalongsidethetrailtofollowthesmellofadeertrackorexploresomecauseknownonlytohim. Beansisawhitedogquitehandsomeandverysmart.Henotonlyunderstandswhatwetellhimbutalsooftenmakessoundsasifheweretryingto37back. Onemorningwetookadifferentroutewhichledustoanunfamiliartrail.Iwassurethistrailwouldeventuallyleadustoourfamiliar38.Butno.Weseemedtobefaroffcourse.AftertwohoursIsuddenlyrealizedthatBeansprobably39thewayhome.SoIurged"Beanstakemehome."Herandownanewtrail.Butitmerelyledtoanintersection岔道口oftrails. Soonitbecame40thatweweregettingnowhere.Ibegantopicturetherestofthedayinthe41withoutfoodordrink.Wehadwalkedabouttenmiles.ButBeansseemedtotally42Thesniffingandexploringwasgoingwellforhim. Finallywe43acrossroadnearahighway.LadyLucksuggestedIshouldturnleft.Wedidand44reachedacottagebesideafield.Iknockedonthedoorandexplainedmysituationtoanoldman.Helaughedandthendroveushome. SinceouradventureI45thatBeansprobablyknewallalonghowtogethome. Hewasjusthavingtoomuchfanexploringnewtrails. 45
圆心-10半径为的圆的方程
Directions:TranslatethefollowingsentencesintoEnglish.希望您在这儿过得愉快
WhenIlivedinSpainsomeSpanishfriendsofminedecidedtovisitEnglandbycar.Beforetheylefttheyaskedmeforadviceabouthowtofindaccommodation.IsuggestedthattheyshouldstayatbedandbreakfasthousesbecausethiskindofaccommodationgivesaforeignvisitoragoodchancetospeakEnglishwiththefamily.Myfriendslistenedtomyadvicebuttheycamebackwithsomefunnystories.Wedidn’tstayatbedandbreakfasthousestheysaidbecausewefoundthatmostfamilieswereawayonholiday.Ithoughtthiswasstrange.FinallyIunderstoodwhathadhappened.MyfriendsspokelittleEnglishandtheythoughtVACANCIESmeantholidaysbecausetheSpanishwordforholidayisvacation.SotheydidnotgotohousewherethesignoutsidesaidVACANCIESwhichinEnglishmeanstherearefreerooms.ThenmyfriendswenttohousewherethesignsaidNOVACANCIESbecausetheythoughtthismeantthepeoplewhoownedthehousewerenotawayonholiday.Buttheyfoundthatthesehouseswereallfull.Asaresulttheystayedathotels!Welaughedaboutthisandaboutmistakesmyfriendsmadeinreadingothersigns.InSpanishthewordDIVERSIONmeansfun.InEnglishitmeansthatworkmenarerepairingtheroadandthatyoumusttakeadifferentroad.WhenmyfriendssawthewordDIVERSIONonaroadsigntheythoughttheyweregoingtohavefun.Insteadtheroadisblockedbyacrowd.Englishpeoplehaveproblemstoowhentheylearnforeignlanguages.OnceinPariswhensomeoneofferedmesomemorecoffeeIsaidThankyouinFrench.ImeantthatIwouldlikesomemore.Howevertomysurprisethecoffeepotwastakenaway!LaterIfoundoutthatThankyouinFrenchmeansNothankyou.WhensomeoneofferedmemorecoffeeandIsaidThankyouinFrenchI______.
Behindourhouseisthestartofafascinatingtrail小径.Thistrailisoneoftheoldroadsthatwindthroughuntoldmilesofforest.My36BeansandIwalkthetrailfrequently.NormallyBeanssniffsalongsidethetrailtofollowthesmellofadeertrackorexploresomecauseknownonlytohim. Beansisawhitedogquitehandsomeandverysmart.Henotonlyunderstandswhatwetellhimbutalsooftenmakessoundsasifheweretryingto37back. Onemorningwetookadifferentroutewhichledustoanunfamiliartrail.Iwassurethistrailwouldeventuallyleadustoourfamiliar38.Butno.Weseemedtobefaroffcourse.AftertwohoursIsuddenlyrealizedthatBeansprobably39thewayhome.SoIurged"Beanstakemehome."Herandownanewtrail.Butitmerelyledtoanintersection岔道口oftrails. Soonitbecame40thatweweregettingnowhere.Ibegantopicturetherestofthedayinthe41withoutfoodordrink.Wehadwalkedabouttenmiles.ButBeansseemedtotally42Thesniffingandexploringwasgoingwellforhim. Finallywe43acrossroadnearahighway.LadyLucksuggestedIshouldturnleft.Wedidand44reachedacottagebesideafield.Iknockedonthedoorandexplainedmysituationtoanoldman.Helaughedandthendroveushome. SinceouradventureI45thatBeansprobablyknewallalonghowtogethome. Hewasjusthavingtoomuchfanexploringnewtrails. 39
WhenIlivedinSpainsomeSpanishfriendsofminedecidedtovisitEnglandbycar.Beforetheylefttheyaskedmeforadviceabouthowtofindaccommodation.IsuggestedthattheyshouldstayatbedandbreakfasthousesbecausethiskindofaccommodationgivesaforeignvisitoragoodchancetospeakEnglishwiththefamily.Myfriendslistenedtomyadvicebuttheycamebackwithsomefunnystories.Wedidn’tstayatbedandbreakfasthousestheysaidbecausewefoundthatmostfamilieswereawayonholiday.Ithoughtthiswasstrange.FinallyIunderstoodwhathadhappened.MyfriendsspokelittleEnglishandtheythoughtVACANCIESmeantholidaysbecausetheSpanishwordforholidayisvacation.SotheydidnotgotohousewherethesignoutsidesaidVACANCIESwhichinEnglishmeanstherearefreerooms.ThenmyfriendswenttohousewherethesignsaidNOVACANCIESbecausetheythoughtthismeantthepeoplewhoownedthehousewerenotawayonholiday.Buttheyfoundthatthesehouseswereallfull.Asaresulttheystayedathotels!Welaughedaboutthisandaboutmistakesmyfriendsmadeinreadingothersigns.InSpanishthewordDIVERSIONmeansfun.InEnglishitmeansthatworkmenarerepairingtheroadandthatyoumusttakeadifferentroad.WhenmyfriendssawthewordDIVERSIONonaroadsigntheythoughttheyweregoingtohavefun.Insteadtheroadisblockedbyacrowd.Englishpeoplehaveproblemstoowhentheylearnforeignlanguages.OnceinPariswhensomeoneofferedmesomemorecoffeeIsaidThankyouinFrench.ImeantthatIwouldlikesomemore.Howevertomysurprisethecoffeepotwastakenaway!LaterIfoundoutthatThankyouinFrenchmeansNothankyou.NOVACANCIESinEnglishmeans______.
若函数fx=x2·lna-2x+2在区间12内有且只有一个零点那么实数a的取值范围是
Directions:TranslatethefollowingpassageintoChinese.Tomakeyourfirstencounterapositiveonestartwithafirmhandshake.Iftheinterviewerdoesn’tinitiatethegestureofferyourhandfirst.Wheneveryou.haveachoiceofseatsselectachairbesidehisorherdeskasopposedtooneacrossfromit.Thatwaytherearenobarriersbetweenthetwoofyouandtheeffectissomewhatlessconfrontational.Ifyoumustsitfacingthedeskshiftyourchairslightlyasyousitdownorangleyourbodyinthechairsoyou’renotdirectlyinfrontofyourinterviewer.
提出教学的教育性观点认为世界上不存在无教学的教育也不存在无教育的教学的是
WhereisloveHowcanwefindloveThepastagesofmanhaveallbeencarefullylabeledbyanthropologists.DescriptionslikePaleolithicManNeolithicManetc.neatlysumupthewholeperiods.WhenthetimecomesforanthropologiststoturntheirattentiontothetwentiethcenturytheywillsurelychoosethelabelLeglessMan.Historiesofthetimewillgosomethinglikethis:inthetwentiethcenturypeopleforgothowtousetheirlegs.Menandwomenmovedaboutincarsbusesandtrainsfromaveryearlyage.Therewereliftsandescalatorsinalllargebuildingstopreventpeoplefromwalking.Thissituationwasforceduponearthdwellersofthattimebecauseofmileseachday.Butthesurprisingthingisthattheydidn’tusetheirlegsevenwhentheywentonholiday.Theybuiltcablerailwaysskiliftsandroadstothetopofeveryhugemountain.Allthebeautyspotsonearthweremarredbythepresenceoflargecarparks.Thefuturehistorybooksmightalsorecordthatweweredeprivedoftheuseofoureyes.Inourhurrytogetfromoneplacetoanotherwefailedtoseeanythingontheway.Airtravelgivesyouabird’seyeviewoftheworld—orevenlessifthewingoftheaircrafthappenstogetinyourway.Whenyoutravelbycarortrainablurredimageofthecountrysideconstantlysmearsthewindows.Cardriversinparticularareforeverobsessedwiththeurgetogoonandon:theyneverwanttostop.IsitthelureofthegreatmotorwaysorwhatAndasforseatravelithardlydeservesmention.Itisperfectlysummedupinthewordsoftheoldsong:IjoinedthenavytoseetheworldandwhatdidIseeIsawthesea.ThetypicaltwentiethcenturytraveleristhemanwhoalwayssaysI’vebeenthere.YoumentiontheremotestmostevocativeplacenamesintheworldlikeE1DoradoKabulIrkutskandsomeoneisboundtosayI’vebeenthere—meaningIdrovethroughitat100milesanhouronthewaytosomewhereelse.Whenyoutravelathighspeedthepresentmeansnothing:youlivemainlyinthefuturebecauseyouspendmostofyourtimelookingforwardtoarrivingatsomeotherplace.Butactualarrivalwhenitisachievedismeaningless.Youwanttomoveonagain.Bytravelinglikethisyoususpendallexperience;thepresentceasestobeareality:youmightjustaswellbedead.Thetraveleronfootontheotherhandlivesconstantlyinthepresent.Forhimtravelingandarrivingareoneandthesamething:hearrivessomewherewitheverystephemakes.Heexperiencesthepresentmomentwithhiseyeshisearsandthewholeofhisbody.Attheendofhisjourneyhefeelsadeliciousphysicalweariness.Heknowsthatsound.Satisfyingsleepwillbehis:thejustrewardofalltruetravelers.Whatisthepurposeoftheauthorinwritingthispassage
如图点P1P2…P10分别是四面体顶点或棱的中点那么在同一平面上的四点组P1PiPjPk1＜i＜j＜k≤10有个．
WhereisloveHowcanwefindloveThepastagesofmanhaveallbeencarefullylabeledbyanthropologists.DescriptionslikePaleolithicManNeolithicManetc.neatlysumupthewholeperiods.WhenthetimecomesforanthropologiststoturntheirattentiontothetwentiethcenturytheywillsurelychoosethelabelLeglessMan.Historiesofthetimewillgosomethinglikethis:inthetwentiethcenturypeopleforgothowtousetheirlegs.Menandwomenmovedaboutincarsbusesandtrainsfromaveryearlyage.Therewereliftsandescalatorsinalllargebuildingstopreventpeoplefromwalking.Thissituationwasforceduponearthdwellersofthattimebecauseofmileseachday.Butthesurprisingthingisthattheydidn’tusetheirlegsevenwhentheywentonholiday.Theybuiltcablerailwaysskiliftsandroadstothetopofeveryhugemountain.Allthebeautyspotsonearthweremarredbythepresenceoflargecarparks.Thefuturehistorybooksmightalsorecordthatweweredeprivedoftheuseofoureyes.Inourhurrytogetfromoneplacetoanotherwefailedtoseeanythingontheway.Airtravelgivesyouabird’seyeviewoftheworld—orevenlessifthewingoftheaircrafthappenstogetinyourway.Whenyoutravelbycarortrainablurredimageofthecountrysideconstantlysmearsthewindows.Cardriversinparticularareforeverobsessedwiththeurgetogoonandon:theyneverwanttostop.IsitthelureofthegreatmotorwaysorwhatAndasforseatravelithardlydeservesmention.Itisperfectlysummedupinthewordsoftheoldsong:IjoinedthenavytoseetheworldandwhatdidIseeIsawthesea.ThetypicaltwentiethcenturytraveleristhemanwhoalwayssaysI’vebeenthere.YoumentiontheremotestmostevocativeplacenamesintheworldlikeE1DoradoKabulIrkutskandsomeoneisboundtosayI’vebeenthere—meaningIdrovethroughitat100milesanhouronthewaytosomewhereelse.Whenyoutravelathighspeedthepresentmeansnothing:youlivemainlyinthefuturebecauseyouspendmostofyourtimelookingforwardtoarrivingatsomeotherplace.Butactualarrivalwhenitisachievedismeaningless.Youwanttomoveonagain.Bytravelinglikethisyoususpendallexperience;thepresentceasestobeareality:youmightjustaswellbedead.Thetraveleronfootontheotherhandlivesconstantlyinthepresent.Forhimtravelingandarrivingareoneandthesamething:hearrivessomewherewitheverystephemakes.Heexperiencesthepresentmomentwithhiseyeshisearsandthewholeofhisbody.Attheendofhisjourneyhefeelsadeliciousphysicalweariness.Heknowsthatsound.Satisfyingsleepwillbehis:thejustrewardofalltruetravelers.Travellingathighspeedmeans______.
在1000个数据中用适当的方法抽取50个作为样本进行统计频数分布表中54.5～57.5这一组的频率是0.12那么估计总体数据落在54.5～57.5之间的约有
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