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在，﹣，0.6，﹣0.65和62%五个数中，最大的数是 ，最小的数是 ．
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五个连续的自然数的和是420这五个数中最大的一个数是多少最小的一个数是多少
数轴上在-13与23之间插入三个数使这五个数中每相邻两个数之间的距离相等则这三个数的和是
五个连续自然数中最小的一个自然数等于这五个数的和的这五个数的和是多少
将连续的奇数13579排成如下的数表1十字框中的五个数的平均数与15有什么关系2若将十字框上下左右平
在10.6﹣0.65和62%这四个数中最大的数是最小的数是．
五个连续自然数如果中间的一个数为x那么这五个数的和是最大的数与最小数的和是三个较大数的和是．
在0.54555%0.和这四个数中最大的数是最小的数是．
从01279五个数字中任选四个不重复的数字组成的最大四位数和最小四位数的差是
8442
8694
8740
9694
从四个数2－1－46中取任意三个数这三个数的和最小是这三个数积最大的是.
五个连续自然数的和是360这五个数最大的一个数是最小的一个数是．
五个不同的正整数的平均数是15其中第三大的数是18则此五个数中的最大的数的最大值可能是
24
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将连续的奇数13579排成如下的数表1十字框中的五个数的平均数与15有什么关系2若将十字框上下左右平
将连续的偶数246810排成如下的数表.回答下列问题1十字框中的五个数的和与中间的数16有什么关系2
在115729562五个数中合数的个数有
5个
3个
1个
4个
ABCDE为五个自然数AB之和等于另外三个数和的五分之三DE之和等于另外三个数和的八分之五若让五个数
25
27
39
50
从数字12345这五个数中随机抽取2个不同的数则这2个数的和为偶数的概率是
从四个数2－1－46中取任意三个数这三个数的和最小是这三个数积最大的是
有五个连续偶数已知第三个数比第一个数与第五个数的和的多18这五个偶数中最大的数是．
下面是按一定规律排列的一列数第1个数第2个数第3个数第个数.那么在第2011个数第2012个数第20
2017年·北京西城一模理科将五个1五个2五个3五个4五个5共25个数填入一个5行5列的表格内每格
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Jennynearlymissedtheflightdoingtoomuchshopping.A.asaresultof B.ontopof C.infrontof D.inneedof
如图是小明春游时在水边看到的美景下图中能正确反映他看到水中树木的光路图是
如图所示两辆相同的小车上分别固定一块磁体和一个铁块将它们靠近到一定距离后由静止释放两小车同时运动下列说法正确的是
在科技节活动中有一项挑战项目如图所示ABCD是装满了某一种材料细盐铁粉米粉中的一种的四个不透明的轻质密闭容器要求在不打开容器的前提下将其中装有相同材料的两个容器挑选出来提供的器材有 ①与密闭容器同样的空容器各一个 ②天平和水按下列步骤在空白处填上适当的内容． 1用天平分别测出图中四个密闭容器的质量mAmBmCmD 2 3若满足关系式用测量的物理量表示则AC两容器中所装材料相同．
请你在图中的方框内设计一个“病房呼叫电路”电路图病人在病床按下开关医护人员在值班室能够听到铃声并通过灯泡的发光可以判断哪个病床在呼叫两个病床即可．
小明看到闪电后12.3s又听到雷声已知声音每3s传播的距离约为1000m光速约为3×108m/s于是他用12.3除以3很快估算出闪电发生位置到他的距离为41km．假设声速或光速发生以下变化这种估算方法不再适用的是
如图所示电源电压恒定R1R2为定值电阻R2＝20Ω灯泡L标有“6V3W”字样． 1当SS1S2都闭合时灯泡L正常发光电流表示数为A电路消耗的总功率为W 2当S闭合S1S2断开时电压表示数为2V则R1的阻值为Ω通电1minR1产生的热量为J．
如图所示电路电源电压恒为4.5V定值电阻R0的阻值为10Ω滑动变阻器的最大阻值为30Ω电阻箱Rx最大阻值为999.9Ω电流表量程为0～0.6A电压表量程为0～3V．闭合开关S下列说法正确的是
DirectionsReadthefollowingpassage.Summarizethemainideaandthemainpointsofthepassageinnomorethan60words.Useyourownwordsasfaraspossible.Afteryouhavealongdayatschoolorworkgettingabitofshut﹣eyeonthewayhomeissometimesjustwhatthedoctorordered.Butsleepingtoolongandendingupwaypastyourdestinationisarealpossibility.AccordingtoresearchfromsleepspecialistsintheUSthereareseveralpossibleexplanationsforbeingabletonapduringatrainorbusrideandstillgetoffattherightstop.Onetheorystatesthatsomepeoplehaveestablishedsleeppatternthatallowthemtosleepandwakeupatpreciselythesametimeeachday.Thatmeanstheirbodyknowswhentowakeupandgetoffthetrain.Anothertheoryisthatpeoplearemorelikelytorecognizethenameoftheirstopsotheirbrainwakesthemupwhentheyhearitannounced.Alternativelythosewhocaneffectivelysleeponthetrainmightactuallybewakingupateverystopbutnotlongenoughtobecomeconsciousuntiltheyknowthey'rereachedtherightplace.Theseshortnapsmightworkforthosewhoarereallyexhaustedforevenabriefresthasthebenefitofreducingstressandhelpingyourelaxalittle.ButifyouaretravellingreallyfareachdaychancesarethatyouwillreachrapideyemovementREMsleepcycles.AccordingtoDr.MarcLeaveywhohasstudiedthisskill'You'remorelikelytobetriedordisorientedwhenyouwakeupfromthesedreamssoifyou'resleepingforlongerthan20minutesyoumayfindithardertowakeupoutofthisdreamstate.Ifyou'reinadeepREMsleepyou'remorelikelytomissyourstoporsleepthroughit.'Noteveryonecandoitbutsomepeoplecanruntheirsleepcyclelikeclockworkandtakeanaponpublictransportation.
不管意图如何表扬对学生有着积极的影响使他们能作出更多的努力并且更有信心地面对将来的挑战.regardless .
在综合实践活动中科技小组设计了一个由压敏电阻控制的报警电路如图所示电源电压恒为18V电阻箱最大阻值为999.9Ω．报警器电阻不计通过的电流达到或超过10mA会报警超过20mA会损坏．压敏电阻Rx在压力不超过800N的前提下其阻值随压力F的变化规律如下表所示． 1为不损坏元件报警电路允许消耗的最大功率是多少 2在压敏电阻Rx所受压力不超过800N的前提下报警电路所选滑动变阻器的最大阻值不得小于多少 3现要求压敏电阻受到的压力达到或超过200N时电路报警按照下列步骤调试此报警电路 ①电路接通前滑动变阻器滑片P置于b端根据实验要求应将电阻箱调到一定的阻值这一阻值为Ω ②将开关向端填数字闭合调节直至 ③保持将开关向另一端闭合报警电路即可正常使用． 4对3中已调试好的报警电路现要求压敏电阻受到的压力达到或超过700N时电路报警若电源电压可调其它条件不变则将电源电压调为V即可．
有两只阻值未知的定值电阻R1R2． 1图甲是用伏安法测R1阻值的实物电路电源电压恒为3V滑动变阻器最大阻值为10Ω． ①甲图中有一根导线连接错误请在该导线上画“×”并在图上改正所画的导线用实线且不能交叉． ②改正电路后闭合开关发现无论怎样移动滑动变阻器滑片两电表均无示数其原因可能是填字母． A．滑动变阻器断路B．R1断路C．R1短路 ③故障排除后正确操作实验器材移动滑片当电压表示数为1.2V时电流表示数如图乙所示则待测电阻R1＝Ω． ④现有以下三组数据分析可知不可能通过以上实验获得的数据有填序号． 2图丙是能巧测R2阻值的实验电路图．图中R为电阻箱R0为定值电阻阻值未知．要求仅利用电阻箱读数表达R2的阻值请在空白处填上适当内容． ①将开关接a调节电阻箱和滑动变阻器滑片P至适当位置记下 ②将开关接b调节保持不变记下 ③则R2＝．
两个相同的圆柱形容器中分别装有体积相等的甲乙两种液体图示是同一只鸡蛋在两种液体中静止时的情景．图中两种液体的密度分别为ρ甲和ρ乙鸡蛋所受浮力分别为F甲和F乙容器底部所受液体压强分别为p甲和p乙则它们的大小关系是ρ甲ρ乙 F甲F乙p甲p乙以下三种方案①在鸡蛋上开小孔用注射器抽取鸡蛋内蛋清再用胶带封好小孔②在鸡蛋上开小孔塞入大头针用胶带封好小孔③在容器中加入比原液体密度更大的液体若想使鸡蛋在乙液体中下沉可行的方案有填序号．
Nooneknowswhatthefuturewilllooklike.Newtechnologyandclimatechangemightmaketheworldmoredifferentthanwecanpossiblyimagine.Sowehadbetterkeepanopenmindandhopeforthebest. Wehavenoideawhatthejobmarketwilllooklikein2050.Itisgenerallyagreedthatmachinelearningandroboticswillchangealmosteverylineofwork﹣fromproducingyoghurttoteachingyoga.Howeverthereareconflictingviewsaboutthenatureofthechangeanditsurgency.Somebelievethatwithinameredecadeortwobillionsofpeoplewillbecomeeconomicallyredundant多余的.Othersmaintainthateveninthelongrunautomationwillkeepcreatingnewjobsandgreaterprosperityforall. Soareweonanedgeofaterrifyingsuddenchangeoraresuchforecastsyetanotherexampleofill﹣foundedLudditehysteria勒德分子的歇斯底里?Itishardtosay.Fearsthatautomationwillcreatemassiveunemploymentgobacktothenineteenthcenturyandsofartheyhavenevermaterialized.SincethebeginningoftheIndustrialRevolutionforeveryjoblosttoamachineatleastonenewjobwascreatedandtheaveragestandardoflivinghasincreaseddramatically. Yettherearegoodreasonstothinkthatthistimeitisdifferentandthatmachinelearningwillbearealgamechanger.Humanshavetwotypesofabilities﹣physicalandcognitive认知的.Inthepastmachinescompetedwithhumansmainlyinrawphysicalabilitieswhilehumansstillhadagreatadvantageovermachinesincognition.Henceasmanualjobsinagricultureandindustrywereautomatednewservicejobsemergedthatrequiredthekindofcognitiveskillsonlyhumanspossessedlearninganalysingcommunicatingandaboveallunderstandinghumanemotions.HoweverAIisnowbeginningtooutperformhumansinmoreandmoreoftheseskillsincludingintheunderstandingofhumanemotions. Wedon'tknowofanythirdfieldofactivity﹣beyondthephysicalandthecognitive﹣wherehumanswillalwaysmaintainasecureadvantage.ItiscrucialtorealizethattheAIrevolutionisnotjustaboutcomputersgettingfasterandsmarter.Itisfueledbybreakthroughsinthelifesciencesandthesocialsciencesaswell.Thebetterweunderstandthebiochemicalmechanismsthatsupporthumanemotionsdesiresandchoicesthebettercomputerscanbecomeinanalyzinghumanbehaviorpredictinghumandecisionsandreplacinghumandriversbankersandlawyers. Inthelastfewdecadesresearchinneuroscienceandbehaviouraleconomicsallowedscientiststogainamuchbetterunderstandingofhowhumansmakedecisions.Itturnedoutthatourchoicesofeverythingfromfoodtomatesresultnotfromsomemysteriousfreewillbutratherfrombillionsofneuronscalculatingprobabilitieswithinasplitsecond.Boasting‘humanintuition'直觉isactuallypatternrecognition. 1Thesecondparagraphtellsusabout. A.predictionsabouttheroleofmachinelearninginfuturejobmarket B.thespeedatwhichroboticswilltaketheplaceofhumanbeings C.theurgencyofcreatingnewjobswiththehelpofautomation D.thenatureofapplyingnewtechnologytoeverylineofwork 2Theunderlinedexpressionill﹣foundedinParagraph3isclosestinmeaningto. A.unidentified B.badly﹣managed C.unproven D.ill﹣intended 3WhichofthefollowingisTRUEaccordingtothepassage? A.Lackofjobsecuritymightforcepeopletopickupmachinelearning. B.ThereispossibilitythatAIcanperformaconsultingroleasapsychologist. C.Theuseofautomationwillmakehumansmoreneededthaneverbefore. D.Arealgamechangerlikesinmakingcomputersbecomefasterandsmarter. 4Whatcanbeconcludedfromthepassage? A.Atrevolutionissimilartotheindustrialrevolutionincausingunemployment. B.It'scrucialthathumansmaintainanadvantageinthethirdfieldofactivity. C.Theprocessofhumandecisioniscontrolledbyfreewillratherthanneurons. D.Thenatureofpreferenceatfirstsightistheresultofrecognizingpatterns.
TheLife﹣changingAntiqueNavajoBlanket ACaliforniamanandhisfamilywentfromragstorichesafterdiscoveringthattheblanketgiventohimbyhisgrandmotherwasworthasmallfortune.LorenKrylzerwaslivinginasmallhutandbarelygettingbyonhisdisabilitypayments.OnedayhehappenedtobewatchingAntiquesRoadshowonTVwhenhelearnedthattheforgottenoldblanketinhisclosetmightbevaluable.TheKrytzerfamilyheirloom传__turnedouttobeanantique古老的Novajoweavingfromthe19thcenturythatfetchedUS＄1.5millionatauction拍卖会. Krytzer'sblanketwasprizedformuchmorethanitsantiquity.AmongNativeAmericantribesTheNavajoarerecognizedasthemostskillfulweaversofblanketsandrugs.Theweavingstyleischaracterizedbyvividvariedpatternsandexceptionaldurability.Fromshearingthesheepspinningpreparinganddyeingthewooltotheactualweavingprocessittakesaround345hourstocreateoneblanket. WomentraditionallywoveNavajoblanketswhilemenbuilttheweavingdevices.TothisdayNavajopeoplestillmakehighqualityblanketsandrugstosell.TheybelievethatsinceonlyGodisperfecttheircreationsshouldhavesomeimperfection.AnotherNavajobeliefisthattheirsoulsaresewnintoeveryweavingsotheyintentionallyincludeahiddenloosethreadintoeachpiece.Thisensuresthatisisn'ttooperfectandtheirsoulscanstillescapeintotheafterlife. TheKrylzersalsohadaloosethreadontheirroadtorichesthatallowedthemtoescapethetrapoffinancialruin.Inanunfortunatetwistthefamily'slife﹣changingwindfall意外之财camewithahugetaxbillfromthegovernmentandalotofimploringrelatives.AftertakingafamilyvacationinMexicobuyinganewsportscarandacoupleofrealestatepurchasesKrytzerlosthisdisabilitypaymentsandnowgetbigbillsforpropertytaxesandinsuranceinstead.Ironicallythefamilydecidedtorelocatetoalessexpensivestatetosavemoney. 1HowdidtheKrytzerfamilygofromragetoriches? A.Afamilymemberpurchasedawinninglotteryticket. B.LorenwasinvitedtohaveaninterviewonaTVshow. C.Loren'sdisabilitypaymentswereunexpectedlyincreased. D.Lorenauctionedoffablankethisgrandmothergavehim. 2AloosethreadwoveninaNavajoblanketindicatesthat. A.God'screationisalsoimperfect B.peoplecanexitfromhorriblesituations C.itsownerissuretohaveaneverlastinglife D.theblanketisreallymadebyhand 3Whydidthefamilyfinallydecidetomovetoanotherstate? A.Toreducethecostofliving. B.Tobehiddenfromtheirrelatives. C.Tochangeforabetterenvironment. D.Toapplyfordisabilitypaymentsagain. 4AccordingtothearticlewhichofthefollowingstatementisTRUE? A.Navajoblanketshavenicepatternsbutdon'tlastlong. B.LorenKrytzermademillionsofdollarsfromdisability. C.Weavingablanketinvolvesmanyprocessesandskills. D.Loren'slifewentfrombadtoworsebecauseofthewindfall.
Markhavehurried.Afterdrivingattopspeed.hearrivedhalfanhourearly.A.needn't B.wouldn't C.mustn't D.couldn't
用橡皮做以下几个小实验． 1用刻度尺测量图中橡皮的长度为cm． 2手用力压住橡皮更易擦去写错的字应用的物理知识是越大越大． 3用细线吊住橡皮将一本物理课本放在课桌面上若发现现象则可以判断课桌面是水平的．
Theoddsarehighthatyou'veseenabeautypageant选美比赛ortwoinyourlife.Theyareamongthemostattendedandviewedeventsintheworld.Despitenumerousdifferentopinionsbeautypageantscontinuetonotonly1butalsobecomemorepopular. MissWorldMissUniverseMissInternationalandMissEarthareknownastheBigFourbeautypageantsandallofthemcontinuetothisday.Thesecompetitions2youngwomenontheirphysicalattractivenessofcoursebuttheyalsoarejudgedontheirpersonalityintelligencetalentandresponsestointerview﹣basedquestions.Theeventualwinnersreceiveprizesincludingcashscholarshipsclothesbeautyqueencrownsandofcoursethetitleoftheeventforoneyear. Alltheseawardsdonotcomecheapfortheyoungladies.Theyhavedutiestofulfillwhileholdingtheirtitles.Beautyqueensoftenappearatfunctionstoraisesocialawarenessaboutenvironmentalandsocialissuessuchasnature3racialorgenderdiscriminationanddiseaseprevention.Byprojectingtheimageofawell﹣educatedrespectablecharacter4withasuccessfulpersonalityeverybeautypageantwinnerisseenasarolemodelandnotjustforyounggirlsalone. Somebeautycontests5menratherthanwomen.SimilartotheirfemininecounterpartsmenenterMisterGlobalMisterInternationalandMisterWorldfortheirlooksstyleandtalent.Thesecontestsshouldnotbe6withtheMisterUniversecontestwhichisanannualbodybuildingcompetition. Thereareotherstrangeand7pageantsallovertheworldthatcelebrateeverythingfrombeingoldtobeingpregnant. Beautycontestswhetherorganizedwithnoble8orjustforfunhaveattractedcriticismsincetheywerefirstheld.Somecriticsobjecttothefocusonphysicalbeautyespeciallyemphasisonacertainstatureandbodyshape.Furthertheypointoutthatsomeparticipantswillactuallyhavethemselvesthroughdietingorplasticsurgerytoachievetheperfectappearance.Despitethesecomplaintsbeautymaybeonlyskindeepbut9itandcompetingforthegloryofbeingthefairestofthemallholdsatimelessanduniversal410
如图所示已给出人射光和出射光请你在ab两盒内分别填上适当的透镜．
以下活动中用来探究声音产生原因的是
NileCruiseinEgypt It'shardtobeatEgyptforitsmixofheatandcultureinDecember.Aseven—nightcruiseonboardatraditional19th—century—stylewoodenluxurysailingvesselwhichsleepsupto12andcruisesbetweenLuxorandAswancostsfrom£775perheadfullboarddepartingonDecember11throughBales08450570600www.balesworldwide.com. ChristmasMarketsinCologne PerhapsthebestofnorthernEurope'smanyChristmasmarketsisCologne—therearesevenseparatethemedmarketswhichstartopeningthisweek.Cologneisalsooneoftheeasiestplacestogettobytrain.EurostarconnectionsfromLondonviaBrusselstakejustunderfourhoursandreturnticketsareavailablethiswinterfrom£8908432186186www.eurostar.com.FordetailsofaccommodationandmarketsseeCologneTourismwww.cologne—tourism.com. SkiinginValThorens IfyouwanttobesureofsnowforskiingintheAlpsbeforeChristmasyouneedtoheadhigh—whereyouwillgettheadvantageofquietslopesandlowprices.Aweek'sstayatChaletElianecostsfrom£399chaletboardthroughCrystalSki08712312256www.crystalski.co.ukormuchmoreluxuriousaweek'shalfboardatthefive—starhotelcostsfrom£1195throughCrystalFinest08719710364www.crystalfinest.co.uk.BothpackagesarefordeparturesonDecember13. JapaneseOnsen SnowmonkeyswarmingthemselvesinthehotspringsatYudanakamakeanendearingsight.Assnowflakesfallyoumaybetemptedtoclimbinyourselfperhapsnotthesamepoolthough.ExperiencethisovernightatatempleandaryokanandseeTokyoandHiroshimatravelingbybullettrainonthe14—nightJapanUnmaskedtour£1600excludingflights01173144620www.insidejapantours.com. 1Theadvertisementismainlyaimedatthosewho. A.studyabroad B.oftentravelaround C.wanttogoshoppingbeforeChristmas D.arefondofskiinginwinter 2Marylovestheideaofshoppingduringhertrip.Shewillprobablycontactbycalling. A.08432186186 B.08450570600 C.08712312256 D.01173144620 3Ifyouwanttogosightseeingbywateryouhavetobook. A.beforeDecember11 B.beforeDecember13 C.beforeChristmas D.afterChristmas 4Ifyouenjoywatchinganimalsbathingwhichwebsitewillyouclickforfurtherinformation? A.www.crystalfinest.co.uk B.www.cologne—tourism.com C.www.insidejapantours.com D.www.balesworldwide.com 5Fromthepassagewecanlearnthat. A.skiinginValThorensishighinprice B.Eurostaristhemostbeautifulareaofthecity C.atouristhastowarmhimselfinthehotspringwithmonkeys D.aLondonerwillspendlessthan4hourstravellingtoColognebytrain
完成图中的光路．
作为一名成年人你一旦签下协议就应该承担履行承诺的责任.assume .
Oh!Theflowercan'tbesaved.Iftheflowerhadbeenwatereditnow.A.wouldn'tbedying B.isdead C.hadbeendead D.willnotdie
—Didyouforgetyourpromisedear? —Ihavefinishedmyhomeworkontimemom. A.Excuseme. B.Surely. C.Whynot? D.HowcouldI?
Thesystemhasbeendesignedtogivestudentsquickandeasytothedigitalresources资源ofthelibrary.A.access B.passage C.way D.approach
如图为一辆正在匀速行驶喷射水雾的环保车它的动能选填“增大”“减小”或“不变”水雾喷出后一会儿就消失了其中发生的物态变化是此过程需要热．
inmylifeimpressedmesodeeplyasmyfirstvisittothePalaceMuseum.A.Anything B.Nothing C.Everything D.Something
根据小磁针静止时所指方向在图中画出通过小磁针中心的一条磁感线并标出电源的正极．
如图是水位自动报警器的原理示意图下图四个实验能反映其自动报警原理的是
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