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几何体的三视图如图所示，该几何体的体积为（ ）
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高三下学期数学《》真题及答案
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.一个几何体的三视图如图所示则该几何体的体积为________.
某几何体的三视图如图所示则该几何体的体积为
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某几何体的三视图如图所示则该几何体的外接球的体积为___________.
某几何体的三视图如图所示则该几何体的表面积为__________.
某几何体的三视图如图所示则该几何体的体积为.
某几何体的三视图如图所示则该几何体的体积为.
一个几何体的三视图如图所示则该几何体的体积为____________.
某几何体的三视图如图所示则该几何体的体积为.
一个几何体的三视图如图所示则该几何体的体积为
一几何体的三视图如图所示则该几何体的体积为____________.
某几何体的三视图如图所示则该几何体的体积等于___________.
一个几何体的三视图如图所示则这个几何体的体积为____________.
某几何体的三视图如图所示则该几何体的体积为.
某几何体的三视图如图所示则该几何体的体积为________.
某几何体的三视图如图所示则该几何体的体积为.
已知某几何体的三视图如图所示则该几何体的体积为.
一个几何体的三视图如图所示则该几何体的体积为_____.
某几何体的三视图如图所示则这个几何体的体积为_____________.
一几何体的三视图如图所示则该几何体的体积为__________.
一个空间几何体的三视图如图所示则该几何体的表面积为_________体积为_________.
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如图在正方体ABCD﹣A1B1C1D1中若M是线段A1C1上的动点则下列结论不正确的是
在桌面上有一倒立的玻璃圆锥其顶点恰好与桌面接触圆锥的轴图中虚线与桌面垂直过轴线的截面是边长为a的等边三角形如图所示．有一半径为r的圆柱形平行光束垂直入射到圆锥的底面上光束的中心轴与圆锥的轴重合．已知玻璃的折射率n＝光在空气中的传播速度为c．求 i光束在桌面上形成的光斑半径R ii光束在玻璃中传播的时间t．
Dreamisstrength.Thestrengthcanbringuswhereverwewanttogettoanditcanbringusalotofwondersonourwaytotheplaceinourdreams. Dreamisbeauty.Maybeyoucanseethethingsfullofmagicandmaybeyouwillbemovedbyyourowndream.1.Butshouldwehaveourlifewithoutdreams?Ofcoursenot. Everyonehashisdreamsanddreamsareespeciallyimportanttoteenagers.Asteenagersyouhavemanydreams.ThesedreamscanbeverybigsuchaswinningtheNobelPrize.Ortheycanbesmallforexampleyoumayjustwanttobecomeoneofthetenbeststudentsinyourclass.2whatdoyoudowithit?Doyouevertrytomakeyourdreamcometrue? AndrewMatthewsanAustralianwritertellsusthatmakingourdreamscometrueisthebiggestchallengeinourlife.3orthatitisimpossibleforyoutobecomeawriter.4.Infacteveryonecanfulfillhisdream.Thefirstthingyoumustdoisrememberwhatyourdreamis.Don'tletitleaveyourheart.Keeptellingyourselfwhatyouwant.Dothisstepbystepandyourdreamwillcometrueearlierbecauseabigdreamismadeupofmanysmalldreams. Youmustnevergiveupyourdreams.5.Butthebiggestonecomesfromyourself.Youneedtodecidewhatisthemostimportantandfaceallthesedifficultiesbravely. A.Thesekindsofthoughtsstopyourealizingyourdreams B.Therewillbemanydifficultiesontheroadtoyourdreams C.Onceyoufindadream D.Youmaythinkyou'renotverygoodatsomeschoolsubjects E.Bothbigdreamsandsmallonesareveryimportanttoourlives F.Theworldissorealthatthedreamsseemweak G.Yourtalentisoneofthemostimportantfactorsinlivingyourdreams
Thepaceoftoday'sworkinglifeblurs使模糊thelinebetweenpersonaltimeandworktimeanditincreasinglymixespersonallifestyleandworkstyle.Andascompaniesaretryinghardtoattractandkeepyoungpeoplefortheirtechnicalskillsandenthusiasmforchangeofficecultureisbecominganextensionofyouthculture.Thismaybenobadthing.Formostofhumanhistorythemiddle﹣agedhaveruledbutinthefuturetheywillhavetosharepowerwithfresh﹣facedyouths. Therehavebeenanumberofreasonsforthischangeandthemostdramaticoftheseistechnology.Childrenhavealwaysbeenmoreexpertthantheirparentsatsomethingbutusuallyagameorafashionnotthecentury'smostimportantbusinesstool.TheInternethasstartedthefirstindustrialrevolutioninhistorytobeledbytheyoung.ThoughtherehavebeenyouthrevolutionsbeforenoneofthemmadeabigchangethewaytheInternethas.Throughoutthe20thcenturyifayoungpersonwantedtoenteranAmericancompanytheyneededtoleavetheiryouthbehind.Theygotahaircutandprobablyasuitoratleastatie.Nowthesamehairsameclothesevennearlythesamehoursapplytoofficeandhome. IfithadnotbeenfortheInternetthischangecouldnothavehappened.HoweveritdidnothappenbecauseoftheInternetonlythecorporaterestructurings公司重组ofthe1980sand90sbrokedowntraditionalhierarchies等级制度.Inmanycompaniesseniority﹣based基于资历的hierarchieshavebeenreplacedbyhierarchiesbasedonperformance.Theabilitiestopleaseyoursuperiorsarenolongerthemostvaluedskills. Today'semployeesstaywithcompaniesonlyaslongastheyfeelchallengedandrewardedmovingfromjobtojobisnowasignofambition. Theriseoftheyoungisagoodthingbecauseitgivesthemmoreopportunitytoputtheirideasandenergyintopracticeattheirmostcreativestageinlife.Nowadaysyouthandyouthqualitiesseemtodominatebuttheexperienceandmaturityofolderemployeesshouldbeputtogoodusetoo. 1Inthe20thcenturytoenteranAmericancompanyayoungpersonneededto. A.workintheofficeandathome B.haveaneye﹣catchinghairstyle C.dressinthebusinessstyle D.leavethebusinesstoolbehind 2AccordingtoParagraph3companyhierarchiesarebasedontheemployees'. A.achievements B.ageandexperience C.skillswiththeInternet D.abilitytopleasetheboss 3Whyistheriseoftheyoungagoodthing? A.Theybecomemoreenergeticinlife. B.Theyhavetakenoverthecompanies. C.Theircreativitycanbeputtogooduse. D.Theirideasappealtoagreatmanypeople. 4Whatcanbeinferredfromthepassage? A.Youngpeoplewillleadinfashion. B.Youngpeoplewillhavemorepower. C.Olderpeoplewillstepoffthehistoricalstage. D.Olderpeoplewillcontinuetobethemainforce.
根据给出的数塔猜测123456×9+7＝ 1×9+2＝11 12×9+3＝111 123×9+4＝1111 1234×9+5＝11111 12345×9+6＝111111 …
假定你是学生李华准备参加黄山国际登山节HuangshanInternationalMountClimbDay志愿者招聘活动活动主办方要求能够熟练运用英语爱好运动有一定的志愿者工作经验.请你用英语写一封自荐信. 内容包括1.你的自荐理由.2.你对活动的理解. 注意1.词数100左右. 2.可以适当增加细节以使行文连贯. 3.开头和结尾以为你写好不计入总词数. Dearsir Thankyouforreadingmyletter. Yourssincerely LiHua
某大学进行自主招生时需要进行逻辑思维和阅读表达两项能力的测试．学校对参加测试的200名学生的逻辑思维成绩阅读表达成绩以及这两项的总成绩进行了排名．其中甲乙丙三位同学的排名情况如图所示 得出下面四个结论 ①甲同学的逻辑排名比乙同学的逻辑排名更靠前 ②乙同学的逻辑思维成绩排名比他的阅读表达成绩排名更靠前 ③甲乙丙三位同学的逻辑思维成绩排名中甲同学更靠前 ④甲同学的阅读表达成绩排名比他的逻辑思维成绩排名更靠前 则所有正确结论的序号是．
TheInternationalVoluntaryServicerunsanumberofYouthExchangesthroughouttheyear.YouthExchangesgivesmallgroupsof4﹣5youngpeopletheopportunitytotakepartinvolunteeringtripsabroadforanaverageoftwoweeks.Theseyoungpeoplearejoinedby4﹣5youngpeoplefrom3﹣4othernationalitiesandareawonderfulinterculturalexperienceinasafeenvironment. ExampleYouthExchanges YouthExchange1 LocationIreland OthernationalitiesIrelandSpainItalyHungary ThemeFocusesonthetopicofcommunityreconstructionandcommunityactivities﹣exploringhowlocalissuesfacingourcommunitiesareconnectedtoglobalissues.Thegroupwillalsolearnabouttheeco﹣villageasanexampleofacommunityandtakepartinteam﹣buildingactivities. YouthExchange2 LocationFrance OthernationalitiesBulgariaItalyFrance ThemeOrganicgardening&continualliving.Thisprojectwilltakeplaceinanaturalparkwherethegroupwilltakepartingardeningactivitiesandgames/workshopsaboutcontinuousdevelopment. YouthExchange3 LocationMacedonia OthernationalitiesSerbiaTurkeyIreland ThemeFoster培养socialinclusionandmotivatepersonaldevelopmentofyoungpeoplethroughsportsandoutdooractivities.Promoteoutdooractivitiesasatooltohelpinclusionofyoungpeoplewithfeweropportunities. YouthExchange4 LocationItaly OthernationalitiesItalyBulgariaGreece ThemeAsocial﹣environmentalprojectthatintendstopromotesocialinclusionandcontinuousdevelopmentregardedasaprocessofcivilrightsandactivecitizenship.Over10daysthegroupwillparticipateinactivitiestoraiseawarenessabouttheeffectofourbehaviorontheenvironment. 1WhatdoyoufocusonwhentravelinginFrance? A.Gardeningwork B.Civilrights C.Developingsocialinclusion D.Rebuildingcommunities 2Ifyouareinterestedinprotectingtheenvironmentyoucantakepartin. A.YouthExchange1 B.YouthExchange2 C.YouthExchange3 D.YouthExchange4 3WhichnationalityareYouthExchangesmostpopularwith? A.Spain B.Italy C.Ireland D.France
某校有160名教职工其中教师120名行政人员16名后勤人员24名为了了解教职工对学校在校务公开方面的意见．现抽取一个容量为20的样本其中后勤人员应抽人数为
同学用一个满偏电流为10mA内阻为30Ω的电流表一只滑动变阻器和一节电动势为1.5V的干电池组装成一个欧姆表如图a所示 1甲乙测试笔中甲表笔应是选填“红”或“黑”表笔． 2电流表5mA刻度处应标的电阻刻度为Ω． 3经调零后将甲乙两表笔分别接图b中的ab两点指针指在电流表刻度的4mA处则电阻Rx＝Ω． 4若误将甲乙两表笔分别接在了图中的ac两点则Rx的测量结果偏选填“大”或“小”． 5再给电流表并联一个合适的定值电阻R就可组装成一个中间刻度值为15Ω的欧姆表则R＝Ω．保留2位有效数字
如图半径为a的内圆A是电子发射器其金属圆周表圆各处可沿纸面内的任意方向发射速率为v的电子外圆C为与A同心的金属网半径为a．不考虑静电感应及电子的重力和电子间的相互作用已知电子质量为m电量为e． 1为使电子从C射出的速率达到3vCA间应加多大的电压U 2CA间不加电压而加垂直于纸面向里的匀强磁场． ①若沿A径向射出的电子恰好不从C射出求该电子第一次回到A时在磁场中运动的时间t ②为使所有电子都不从C射出所加磁场磁感应强度B应多大．
哈六中数学兴趣小组的同学们为了计算六中数学组二维码中黑色部分的面积在如图一个边长为4的正方形区域内随机投掷400个点其中落入黑色部分的有225个点据此可估计黑色部分的面积为
已知某校5个学生期末考试数学成绩和总分年级排名如表 Ⅰ通过大量事实证明发现一个学生的数学成绩和总分年级排名具有很强的线性相关关系在上述表格是正确的前提下用x表示数学成绩用y表示年级排名求y与x的回归方程其中都取整数 Ⅱ若在本次考试中预计数学分数为120分的学生年级排名大概是多少 参考数据和公式其中＝＝﹣x． 其中xi﹣yi﹣＝﹣13040．
OncewhenIwasateenagermyfatherandIwerestandinginlinetobuyticketsforthecircus马戏.Finallytherewasonlyonefamilybetweenusandtheticketcounter.Thisfamilymadeabigimpressiononme.Therewereeightchildrenallprobablyundertheageoftwelve.Youcouldtelltheydidn'thavealotofmoney.Theirclotheswerenotexpensivebuttheywereclean.Thechildrenwerewell﹣behavedallofthemstandinginlinetwo﹣by﹣twobehindtheirparentsholdinghands.Theywereexcitedlytalkingabouttheclownselephantsandotheractstheywouldseethatnightwiththeirbrothersorsistersinalowvoice.Onecouldsensetheyhadneverbeentothecircusbefore.Itpromisedtobehighlightoftheiryounglives.Thefatherandmotherwereattheheadofthepackstandingproudascouldbe.Themotherwasholdingherhusband'shandlookingupathimasiftosay'Youaremyknightinshiningarmor.'Hewassmilingandrespondinginpridelookingbackatherasiftosay'Yougotthatright.'Theticketladyaskedthefatherhowmanyticketshewanted.Heproudlyresponded'Pleaseletmebuyeightchildren'sticketsandtwoadultticketssoIcantakemyfamilytothecircus.'Theticketladygavetheprice.Theman'swifeletgoofhishandherheaddroppedandhislipsbegantoshake.Thefatherleanedalittlecloserandasked'Howmuchdidyousay?'Theticketladyagainquotedtheprice.Themandidn'thaveenoughmoney.Howwashesupposedtoturnandtellhiseightchildrenthathedidn'thaveenoughmoneytotakethemtothecircus?Actuallywewerenotwealthyinanysense.SoIunderstandhowthekidswouldfeel.Ifeltsorryforthem.注意1.所需写的短文词数应为150左右2.应使用5个以上短文标有下划线的关键词语3.续写部分分为两段每段的开头语已经为你写好4.续写完成后请用下划线标出你所使用的关键词.Paragraph1Seeingwhatwasgoingonmydadputhishandinhispocketpulledouta﹩20billanddroppeditontheground.Paragraph2ThatdaymyfatherandIwentbacktoourcaranddrovehomewithoutanytickets..
MywifeandIrecentlyhadatwo﹣weektriptoVietnamandThailand.Itwasexciting!Thebestpartwasthatwemadedifferentpeople's1there.IalsolearnedsomelessonsfromthetripandI'dliketo2thebiggestlessonthatIlearnedwithyoutoliveyourlifetothefullestyouneedtolearnnew3. IspendmostofmytimeinmyhomecountryIndonesia.4Icanunderstandwhateverybodyissayingthere.IalsospentsometimeoverseasinanEnglish﹣speakingcountry.Icouldalso5whateverybodythereissaying. Thistripisquitedifferent.HereIspentmytimeintwocountrieswheremostpeopledon'tspeakEnglish.6Icouldn'tunderstandwhattheyweresaying!Iremembermy7thatwhatsoundedlikerandomvoicestomeactually8meaning.Ialsorememberthe9feeling﹣aftercomingbackhome﹣ofsuddenlyunderstandingagainwhateveryonearoundissayingwhichleftmepuzzledand10. ThisgavemerealizationIhavebeenlivingina11environment.Beingataplacewitha12languageisoneofthegreatpleasuresinlife.It'sgoodtounderstandwhateveryonearoundyouissaying13havingtolearnanythingnew. But14?Doingthatmeans15yourselftojustasmallpartoftheworld.It'slikebeinginasmallbox.The16isthatthereissomuchmoreoutthere.Therearesomany17culturestoexperienceinothercountries.Youneedto18themifyouwanttoliveyourlifetothefullest.Butthat19youtolearnnewlanguagesafteryou20yourbox. 1A.day B.peace C.acquaintance D.assistance 2A.share B.provide C.teach D.attend 3A.languages B.customs C.manners D.skills 4A.Surprisingly B.Practically C.Hardly D.Obviously 5A.copy B.predict C.follow D.identify 6A.Otherwise B.Therefore C.However D.Besides 7A.amazement B.satisfaction C.disappointment D.argument 8A.reserves B.produces C.possesses D.lacks 9A.pleasant B.anxious C.uneasy D.strange 10A.inahurry B.ataloss C.atadisadvantage D.inadilemma 11A.visible B.recognizable C.comfortable D.changeable 12A.special B.familiar C.beautiful D.natural 13A.without B.by C.except D.beyond 14A.whatfor B.sowhat C.howcome D.guesswhat 15A.devoting B.preventing C.limiting D.committing 16A.reason B.fact C.challenge D.trick 17A.traditional B.memorial C.noble D.diverse 18A.waitfor B.playwith C.gothrough D.relateto 19A.intends B.requires C.commands D.encourages 20A.getridof B.jumpoutof C.makeuseof D.takechargeof
Weallhavesomepeoplewhomwerespectverymuchlikeourfamilymembersourfriendsorourteachers. Respectoftenmeansdifferentthingstodifferentpeople.Thereareseveralaspectsthatmanypeoplecanagreeonthough.Forexampleatitsmostbasiclevelrespectmeansbeingkindandconsideratetoothers. Respectcantakemanyforms.Don'tmakefunofothers.Putyourselfinotherpeople'sshoesandthinkabouthowtheyfeel.RemembertheGoldenRuletreatothersthesamewayyou'dwanttobetreated. Respectisimportantbecauseitsetstheproperstageforallourhumaninteractions.Friendshiploveandevenbasiccommunicationmustallstartwithrespect. Everyonewantstoberespected.Togetrespectthoughyoumustalsoshowrespectforothers.It'salwaysatwo﹣waystreet.Youcan'tbeimpolitetoothersandexpectrespectinreturn. It'seasytoshowrespect.Bepolite.Lookforthebestinpeopleratherthanconcentratingontheirmistakes.Showcompassiontoothersandtrytoputtheirinterestsbeforeyourown.Makeotherscomfortablewhenthey'reuneasy.Helpoutwheneveryoucan.Whenyoupayitforwardamazingthingscanhappen. Andberespectfultoeveryone.Theworldisanunbelievablyhugeplacefilledwithbillionsofpeopleeachoneofwhomisuniqueandspecial.Andtheyalldeserveyourrespect! Becarefulthough.Noteveryonewillshowyourespectallthetime.Infactyou'llprobablyseeexamplesofimpolitebehavioureachandeveryday.Howyourespondtoimpolitebehaviourthoughcanmakeahugedifference. Ifyouchoosetorespondtoimpolitebehaviourbyactingrudelyyourselfyou'vegainednothing.You'veonlycontinuedthepatternofimpolitebehaviourandsetabadexample.Insteadactrespectfullyandsetagoodexample.Consistentlyactingrespectfullymightjusthelpotherslearnfromyourexample! 1AccordingtotheGoldenRule. A.you'dbetterwalkinothers'shoes B.youcan'tplayjokesonotherpeople C.youshouldpayattentiontoyourfeelings D.thewayyouaretreateddependsonyourself 2BysayingIt'salwaysatwo﹣waystreetinParagraph4thewriterprobablywantstotellus. A.Peopleshouldrespecteachother B.Itisalwayssafetowalkinthestreet C.Someleaveandotherscomeback D.Thereisonlyonestreettogothrough 3Thefifthparagraphismainlywrittentotellus. A.wheretofindrespect B.howtocorrectmistakes C.whentohelpothersintime D.howtoshowrespectforothers 4Accordingtothepassagewhatshouldwedoifsomeoneisimpolitetous? A.Showhim/hertruerespect. B.Leavehim/heralone. C.Bekindtohim/hersometimes. D.Setaspecialexampletoothers.
如图所示潜艇采用压缩空气排出海水控制浮沉在海面上潜艇将压强为1.0×105Pa总体积为600m3的空气包含贮气筒内空气视为理想气体压入容积为3m3的贮气筒．潜至海面下方190m水平航行时为控制姿态将贮气筒内一部分压缩空气通过节流阀压入水舱使15m3的水通过排水孔排向与之相通的大海．已知海面处大气压p0＝1.0×105Pa取海水的密度ρ＝1.0×103kg/m3g＝10m/s2求 ①潜艇下潜前贮气筒内空气的压强 ②排出水后贮气筒内剩余空气的压强．
I'dliketosharealittlestorywithyouaboutsomethingthathappenedwhenIwasfour.Irememberitclearly.Ourlovingfamilydogwasnearingtheendofhislife.Myfatherpickedhimupandputhiminalittlebedwehadmadeforhim.Ourdogmycompanionwhomwehadcaredforbitmyfatherwhenheattemptedtohelphim.Howcouldhe?Why?Icouldn'tunderstandit.Ididn'tlikehimanymore. Ihadn'tthoughtaboutthatstoryforalongtimebutsomethingthathappenedlastweekbroughtitbacktome.Iwenttospeakwithafriend.WhenIknockedonthedoorImetinaninstantanangrylookandafewharsh尖刻的words.Whenthedoorwasslammed砰地关上inmyfaceIstoodthereshockedandinarushIwasremindedofmydogthatbitmyfather20yearsagoorso.Whatbroughtthatstorybackwasthatsamefeelingofbetrayal. Bothstoriestaughtmesomethingthenextday.YouseewhenIgotupinthemorningandwastoldmydoghaddieditbecamecleartomethathemusthavebeeningreatpain.Forhimtohavebittenafamilymemberhecouldnothavebeenhimself.MuchthesamefortheotherstorywhenIlearnedthatmyfriend'swifehadjustlefthim. Weareallbeingsofourenvironmentsouropinionsandfeelings.Andallofthosethingscancauseyoutosayanddothingsthatcan'tbeunderstoodbythosewhoarenotinthesamesituationwithyou. Ifyoumeetsomeoneeitherbehavingoutofcharacteroractinginawaythatdoesn'tseemtofitthesituationputoutyourhandandbepatientwhenyouthinkitisleastpossibleforhimtodoso.Youmayturnaroundastorythathasasadendingsimplybyyouractions. 1WhatistheinfluenceoftheincidentmentionedinParagraph1?D A.Ithurthisfather'sfeelingdeeply. B.Itmadetheauthordislikedogs. C.Ithaspuzzledtheauthoreversince. D.Itleftadeepimpressionontheauthor 2Amadetheauthorthinkaboutthestoryabout20yearsago. A.Hisfriend'sattitude B.Thephotoofthedog C.Hisfather'swound D.Hisfriend'ssuffering 3Whatadvicedoestheauthorgiveusaccordingtothetext?B A.Lookbeforeyouleap. B.Learntoputyourselfinother'sshoes. C.Helpthoseinneed. D.Respectforothersisakindofvirtue.
Noteveryonedealswiththeirfeelingsasanopenbookforotherstoread.1GLearntoopenupinordertoimproveyourmentalhealth. 2FAcceptthisandmoveon.Giveyourselfsometimetohavesweatypalmsorashakyvoicesinceitwillgetbetterwithpractice. Askpeopleopen﹣endedquestions.Tobeginpracticingopeningupyouneedtoengageinhonestopenconversation.TryaquestionlikeHowarethingsgoingatwork?insteadofHow'sitgoing?togetanopenanswer.Theninturnansweropen﹣endedquestionswithhonestanswersinsteadofFineorOK.3CHoweverinmostcasespeopleareflatteredthatyouarelisteningtothemandinterestedintheirlife. Tryemulating效仿someonewhoisveryopen.Observetheminasocialsituation.Thentrytoactasifyouarethemoccasionally.Manyopenbehaviorsarelearnedandnotanaturalpartofpersonality.4A Avoidbeingaknowitall.Somepeoplethinkadviceisopeningupbutitisunlikelytohelpyoumoreopen.Whenyouwanttogiveadvicelistenandtrytolearnsomethingnewfromthesituation. 5BScheduleatleastonelongconversationperweek.Intheconversationyoutellsomeoneabouttheemotionalanddifficultpartofyourlife.Getintothepracticeofopeningupaboutwhat'sgoodandbadinyourlife. A.Inthiscasepracticecanmakeperfect. B.Callclosefriendsandfamilymembersmoreoften. C.Askingpeoplepersonalquestionsisnotalwaysproper. D.Tryconnectingabouthobbiesinterestsvacationsorbooks. E.Listeningpatientlyisagreatwaytoovercomefearofsharingemotionsinpublic. F.Understandthatthereisusuallysomefearwithopeninguptootherpeople. G.Howeverclosingyourselffromnewpeoplecanstopyourpersonalgrowth.
StartingthisSeptemberfreshmenatTsinghuaUniversitywillhavetotakeswimmingcourses.Theywon'treceivetheirdegreesuntiltheypassthetest1successfullysuccess.Exceptionswillbeallowedforstudentswithcertainphysicalormentalconditionsif2proved/provenprovebymedicalstaff.Actuallyviewingtheability3toswimswimasamustforstudentsisnotsomethingnewtothisuniversity.Itwasa4requirementrequireintheearly20thcentury.Lateritdroppedduetoa5risingrisenumberofstudentsandalackoffacilities设施.Asfor6thenewruleopinionsvarygreatly.Somestudentswelcomeitsayingit'sanecessaryskill7that/whichcansaveliveswhileothersarguethatit'snot8reasonablereasontolinkdegreeswithswimmingability. InresponsetothenegativereviewsLiuBoheadoftheDivisionofSportsSciencegavethefollowingexplanation.9Asawatersportswimmingdoeslessharmtojoints关节andmusclesandishelpfulinimprovingstudents'endurance.10Therefore/Consequently/Thusit'sbeneficialtostudentsinthelongrun.
已知命题p∀x∈Rsinx≤1则
DebraAveryhasbeenahorseloversinceshewasalittlegirlinSanDiego.Herfamilycouldn'taffordahorseofitsownsoDebraborrowedridesatthelocalhorse﹣ridingcentergainingtheconfidenceonlyfoundatopahorse.YearslaterDebrarememberedthoseearlydaysandthelessonsshelearnedwiththehorsesattheridingcenterandwantedtohelpotheryoungwomengetthebenefitsofconnectingwithhorses.IalwayswantedtorunahorseprogramforgirlslikemesaysDebra.Iwantedtohelpthemgainthecouragetobearoundahorseandtocareforahorse. OnedayattheLosAngelesHorse﹣ridingCenterasDebrarodebesideherfellowriderJudithHopkinsshementionedaninheritance遗产fromherfather﹣in﹣lawandherdesiretouseittoservedisadvantagedgirls.Judithhadthesamedream﹣andanamefortheorganization. TheyfoundedTakingtheReinsTTRin1998.Theorganizationservesmorethan400youngwomenperyearinafter﹣schoolweekendandsummerprogramsthatfeaturehorseridingandcaregardeningandevencompetitivehorseshowing.Mostparticipantslivebelowthepovertylineandoftenhavenothadreliablehousingformorethansixmonthsatatime.Fewhaveprevioushorseexperience. TTRusesfarmandranchexperiencestoteachresponsibilityleadershipteamworkandself﹣confidence.DirectorDr.JaneHavensaysAlargenumberofourgirlsaresomewhatautistic孤独症的.Ican'tcounthowmanyofthemhavefoundtheirfirstsocialfriendsthankstosharingthishobbyandactivity.Horsesbringthemoutinsuchawonderfulway. JanealsoseesmembersofTTRprogramexcelinschool﹣100percentofyoungwomeninvolvedforfouryearsormorehavegraduatedfromhighschool.Ninety﹣ninepercentofthoseparticipantshavegoneontoattendfour﹣yearcolleges. Debraseesamoreobviousimpact﹣afterafewweeksintheTTRprogramtheyoungwomensitalittlehigherintheirsaddles马鞍.There'sjustsomethingaboutsittinguponthebackofahorsethatgivesthemaboostofconfidence. 1WhatprogramsdoesTTRoffer? A.Horseridingandshowing. B.Horsecareandfarming. C.Petcareandgardening. D.Weekendhikingandcamping. 2Whowastheorganizationfoundedfor? A.Homelessandlonelywomen. B.Hard﹣workingschoolgirls. C.Femaleautisticpatients. D.Poorhorse﹣lovinggirls. 3InwhatwayhasTTRchangeditsmembers'life? A.Theyhavebeengivenfinancialaid. B.Theyhaveachievedacademicexcellence. C.Theyhavegrownintoprofessionalhorseriders. D.Theyhavebeenprovidedwithreliablehousing. 4Whatcanwelearnfromthelastparagraph? A.TTRisaprofit﹣makingorganization. B.TTRprogramlastsafewweeks. C.Thegirls'confidencegrowsquickly. D.Thegirlscanridetallerhorses.
Positivethinkingdoesnotmeanyouhavetofindeveryideaabsolutelywonderful. It1domeanyouhavetobereadytoexploreanideaandtotryandbringoutwhatevergoodfeaturesithas.Thenextstepmightbetofindthe2weakintheideaandtotryandstrengthenthemratherthanusethem3simpleasanexcuseforrejectingthewholeidea.Finallytheideaafterit4exploremaynotbeusedbecausethereisa5goodoneorbecausegood6itisitisnotsuitable.Thereis7somethingwrongwithbeingpositiveaboutanideaatfirstandthen8rejectitlaterwhenyouseethatitwon'twork. Itiseasytobenegativeandcriticalandtoomuchtalentiswastedinnegativethinking.Itistimewe9showlessrespectforthiskindofdestructivethinkingandfocused10positivethinkingmore.Soremembertothinkpositively.
若从甲乙丙丁4位同学中选出2位同学参加某个活动则甲被选中的概率为．
目前学案导学模式已经成为教学中不可或缺的一部分为了了解学案的合理使用是否对学生的期末复习有着重要的影响我校随机抽取200名学生对学习成绩和学案使用程度进行了调查统计数据如表所示 已知随机抽查这200名学生中的一名学生抽到善于使用学案的学生概率是0.6． 参考公式其中n＝a+b+c+d 参考数据 1请将上表补充完整不用写计算过程 2试运用独立性检验的思想方法分析有多大的把握认为学生的学习成绩与对待学案的使用态度有关
2018年暑假期间哈六中在第5届全国模拟联合国大会中获得最佳组织奖其中甲乙丙丁中有一人获个人杰出代表奖记者采访时甲说我不是杰出个人乙说丁是杰出个人丙说乙获得了杰出个人丁说我不是杰出个人若他们中只有一人说了假话则获得杰出个人称号的是
如图四棱锥P﹣ABCD的底面为菱形且∠ABC＝120°PA⊥底面ABCDAB＝2PA＝ Ⅰ求证平面PBD⊥平面PAC Ⅱ求三棱锥P﹣BDC的体积． Ⅲ在线段PC上是否存在一点E使PC⊥平面EBD成立．如果存在求出EC的长如果不存在请说明理由．
Ihandedthecardfrommyschool'shelp﹣wantedboardtothemanbehindthecounterofMort'sDeli熟食店attheFarmersMarket.EvenbeforeIopenedmymouthhewasshakinghishead. ItwasSeptember1957andmyfamilyhadjustarrivedinCalifornia.Myfatheronlygotworktwoorthreedaysaweek.OurpoorsavingsweregoneandastheeldestboyofthefamilyIwastheonlyoneabletohelp. letmeworktherestoftheweekandifyoudon'tlikethewayIdothejobdon'tpayme.Isaid.Thetallmanstaredatmethennodded.AtMort'sIworkedveryhard.Neartheendofthedayhecalledmeuptohim.Howmuchdidthatcardatschoolsaythisjobpaid?heasked.Onedollaranhour.Iwhispered.ActuallyIwaswillingtotakeless. That'snotenoughforsomeonewhoworksashardasyouMortsaid.Youstartat£1.25.OverthenextfewweeksIlearnedalotaboutMort.OurstorewasclosedonSundayssoeverySaturdayeveningMorturgedmetotakehometheleftoversoup.Itwasamealinitselfatreatformystrugglingfamily. OneSaturdayafterwork.IwasabouttostepinmyhousewhenIsawalargemaninmyfather'schair.Hewasswearingatmyfather.Iquietlywalkedintothekitchenandlistenedthroughthedoor.Themanwantedtotakeourcar.Dadofferedtomakethethreepaymentsthatwereduebutthemandemandedtheentiresum﹣﹣﹣£325﹣﹣﹣orthecar.IslippedoutofthedoorthinkingWhomighthave£325?Whowouldevenconsiderlendingmesomuchmoney? TheonlypersonIcouldthinkofwasMort.Iranbacktohisdeliandtoldhimmytale.Socouldyoupossiblylendmyfather£325?Ifinishedrealizinghowabsurditsounded.AlthoughMort'seyebored挖holesinmyfacehegaveme£325sayingI'lltakebackhalfyourwagesuntilit'srepaid. ThatnightIwasaherotomyfamilyButtherealherowasMortRubinwhoquietlyraisedmysalaryeverymonthafterwards.Hemadetheworldabetterplace. 1WhydoestheauthortalkabouthisfamilyinParagraph2? A.Toshowhisstrongdesireforajob. B.Toreflecthispoorlivingconditions. C.Tostresstheheavyburdenonhisfather. D.ToprovehighlivingcostsinCalifornia. 2Whatcanbeinferredfromtheunderlinedsentence? A.Themealwascheapbutverydelicious B.Thesoupwasfuelinsnowyweather. C.Thesoupwasmorethanthefamilycouldconsume. D.Thesoupwasabasicsolutiontotheauthor'sfamily. 3WhydidMortgivetheauthor£325? A.Becausetheauthorwantedtobuyacar. B.Becausethethreepaymentsoftheauthor'sfamilyweredue. C.Becausehethoughtitabsurdnottolendtheauthorthemoney. D.Becausetheauthorwantedtopayoffallthedebtsforhisfamily. 4WhichwordscanbeusedtodescribeMortRubin? A.Coldbutflexible. B.Patientandhard﹣working. C.Kindandhelpful. D.Strictandcalculating.
Whenalaptoporsmartphonebatterystartslosingitspowertheonlyoptionsaretobuyanexpensivereplacementorjustkeepitpluggedinallthetime.Butonewomanmayhavefoundtheanswertothisproblem. MyaLeThaiisascientiststudyingattheUniversityofCalifornia.Sherecentlydiscoveredaprocessthatmayleadtobatteriesthatlastforever. Thaisaidshehadbeenfrustratedthatthebatteriesforherwirelessdevicesdegradedovertimeuntiltheyfailedtochargefully.Thaididnotlikehavingtokeepherlaptopconnectedtoanelectricaloutlet电源插座tokeepitpoweredon.Soshedecidedtodosomethingaboutthatproblem.AtfirstsheandherteamatUCIrvinethoughtaboutinventinganewbattery.ButastheyexperimentedThaidiscoveredsomethingthatmightpermitlithium﹣ion锂离子batteriestolastforever. Lithium﹣ionbatteriespowermostwirelessdevices.Overtimethebatterieslosetheabilitytoholdacharge.Mostofthesebatterieshavealifespanofabout7000chargingcyclesbeforetheydie.Oneofthereasonslithium﹣ionbatteriesdegradeistheiruseofnanowirestocarryelectricity.NanowiresareextremelythinAhumanhairisthousandsoftimesthickerforexample.Nanowiresareextremelyefficientcarriersofelectricitywhichmakesthemusefulinbatteries.ButThaisaidtheirthinnessalsomakesthemweak.Nanowiresbreakandfractureovertimeshesaid.That'swhytheylosecapacity. ButThaihadatheory﹣﹣﹣thenanowiresmightlastlongerifcoveredwithagel凝胶.Sheandherteamtestedthistheory.ItwasalongprocessandalotofworkThaisaid.Theteamtriedmanycoveringsforthewires.PMMAatypeofplasticwasoneofthem.ThenanowireswerecoatedwithPMMAandcycledthroughcharges200000times.ThePMMA﹣coatednanowiresshowednoevidenceofdamage.Theresultssuggestthatbatteriescouldlastforeverwithoutlosingchargingability.Thaisaid200000cyclesamounttoaboutthreemonthsonjustonedevice.Thaihopestocontinueherresearchtounderstandwhythisgelworkssowellandtoseeifanyothergelcouldcreatebetterresults. 1WhatcausedThaitoworkonlithium﹣ionbatteries? A.Shefoundthatbatteriesgraduallywearout. B.Shedislikedthebatteriesforherlaptop. C.Shethoughtbatteriesweretooexpensive. D.Sheandherteamwereassignedtoinventanewbattery. 2WhichofthefollowingsentencesisTRUEaboutnanowires? A.Theyaretooweaktocarryelectricity. B.Theylastonly7000chargingcycles. C.Theyarethemaincauseofbatterydegrading. D.Theyarenotsuitabletouseinbatteries. 3Thebreakthroughmaymostprobablyliein. A.anewkindofbattery B.newmaterialsforbatteries C.Coatingnanowiresingel D.anewwayofchargingbatteries 4Whatmaybethebesttitleforthepassage? A.Whybatteriesaredegrading B.Scientistinventslife﹣longbattery C.Nanowiresdiscoveredbyscientist D.Nanowirestryingonnewcoating
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. Inordertostrengthenoursenseofsocialresponsiblethestudentsinourschoollaunchedanactivityofdonatingbookstothechildreninpoorareas.WegatherinfrontoftheschoollibraryintheafternoonofJan.15th.Eachofthemgaveawaysomebookswhatwetreasured.Weevenwroteournamesandaddressonthefrontpageshopetobecontactedandmakefriendswiththechildrenwhowouldreceivethebooks.Abouttwothousandbookswerecollectedinandsentaway.Anactivitynotonlyprovidedagoodchanceforusshowloveforothersbutalsohelpedustomakenewfriends.
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