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某研究性学习小组的同学用电解水的方法测定水的组成后，提出问题：“测定水的组成还有其他的方法吗？”经过讨论后，得到了肯定的答案，邀请你一起对此展开探究． 【设计方案】甲同学利用氢气还原氧化铜的原理...
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为了建设环境友好型社会节能减排将成为我国政府目前工作的重点因此节约能源与建设新能源是摆在当前的一个课
采用电解水法制取氢气作为新能源
完善煤液化制取汽油的技术
研制推广以乙醇为燃料的汽车
进一步提高石油加工工艺
某化学兴趣小组的同学在老师的指导下做电解水实验确定水的组成甲乙丙三位同学对电解水后液体的酸碱性进行探
某研究性学习课题小组在教师的指导下完成了水的体积随温度变化的研究得到如图4的图线根据这个图线当水的温
先变小后变大
保持不变
一直变大
先变大后变小
实验室用电解水的方法测定水的组成该反应中水氢气氧气的质量比为
2：2：1
9：1：16
9：1：8
3：2：1
某课外学习小组共8位同学其中4个同学从来没有参加过数学研究性学习活动4个同学曾参加过数学研究性学习活
某研究性学习小组将15mL氯气慢慢溶于1000mL自来水发现溶于自来水后的溶液黄绿色很浅接近无色为探
用电解水的方法分析水的组成时需加入一些物质以增强水的导电性一般不宜加入的物质是
Na
2
SO
4
NaCl
CuSO
4
KOH
某化学兴趣小组的同学在老师的指导下做电解水实验确定水的组成甲乙丙三位同学对电解水后液体的酸碱性进行探
实验是化学学习的一种重要手段如利用电解水实验可探究水的组成.请根据电解水实验回答下列问题1通电后电极
实验是化学学习的一种重要手段如利用电解水实验可探究水的组成请根据电解水实验回答下列问题1通电后电极上
某研究性学习小组的同学对电解水的实验很感兴趣很想通过实验验证这一结论于是在征得老师的同意后进行实验实
为了了解水的组成某同学提出了电解水的方法这个环节属于科学探究中的
提出假设
设计实验
收集证据
作出结论
为了了解水的组成某同学提出了电解水的方法这个环节属于科学探究中的
提出假设
设计实验
收集证据
作出结论
某研究性学习小组的同学对电解水的实验很感兴趣很想通过实验验证这一结论于是在征得老师的同意后进行实验实
2009年11月世界环境大会在丹麦哥本哈根举行节能减排在各国政府间已达成有限共识节约能源与开发新能源
采用电解水法制取氢气作为新能源
完善煤液化制取汽油的技术
研制推广以乙醇为燃料的汽车
进一步发展风能、太阳能等新能源
实验是化学学习的一种重要手段如利用电解水实验可探究水的组成.请根据电解水实验回答下列问题1通电后电极
实验是化学学习的一种重要手段如利用电解水实验可探究水的组成请根据电解水实验回答下列问题1通电后负极产
在探究电流跟电压和电阻的关系时采用保持电阻不变研究电流和电压关系的研究方法下列实验中运用该方法的实验
探究磁场的方向
电解水实验中，通过检验两极产物研究水的组成
通过改变溶剂、温度测定物质溶解的多少，研究影响物质溶解性的因素
测量滑动摩擦力大小时，通过弹簧测力计的示数得知摩擦力的大小
某研究性学习课题小组在教师的指导下完成了水的体积随温度变化的研究得到如下图像根据图像可说明温度从8℃
水的密度先变小后变大
水的密度保持不变
水的密度先变大后变小
水的密度一直变大
实验是化学学习的一种重要手段如利用电解水实验可探究水的组成.请根据电解水实验回答下列问题通电后电极上
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不等式组有4个整数解则m的取值范围是．
如图将边长为2的正六边形ABCDEF绕顶点A顺时针旋转60°则旋转后所得图形与正六边形ABCDEF重叠部分的面积为．
10分Weallknowtheimportanceofcuriosityandherearesometipsonhowtodevelopit. Keepanopenmind.Thisisessentialifyouaretohaveacuriousmind.Beopentolearningunlearningandrelearningthings.1Thereforeyoushouldbepreparedtoacceptthispossibilityandchangeyourmind. 2Mostpeoplejustaccepttheworldasitis.Thiswaytheywillcertainlylosetheholycuriosity.Trytodigdeeperbeneaththesurfaceofwhatisaroundyou.Asurewaytodigdeeperbeneaththesurfaceisaskingquestions.Whatwhywhenwhowhereandhowarethequestionscuriouspeoplealwaysask. Don'tlabel标注anythingasboring.Wheneveryoulabelsomethingasboringyoucloseonemoredoorofpossibilities.Curiouspeopleareunlikelytoconsiderthingsboring.3 Eveniftheydon'tyethavetimetoexplorethemtheywillleavethedooropentobevisitedanothertime. Takelearningassomethingfun.Ifyouseelearningasaburdenthere'snowayyouwillwanttodigdeeperintoanything.Thatwilljustmaketheburdenheavier.Howeverifyouthinkoflearningassomethingfunyouwillnaturallywanttodigdeeper.4 Readdiversematerials.Itwillintroduceyoutothepossibilitiesandexcitementofotherworldswhichmayattractyourinterestinexploringfurther.Oneeasywaytodothisisthroughreadingdiversematerials.5It'llfeedyourmindwiththeexcitementofanewworld. A.Nevertakethingsasgranted. B.Don'tspendtoomuchtimeonjustoneworld. C.Trytopickabookormagazineonanewsubject. D.Somethingsyouknowandbelievemightbewrong. E.Itdoesn'tmatterthatyoudon'tagreetoothers'opinions. F.Insteadtheyalwaysseethesethingsasadoortoanexcitingnewworld.G.Solookatlifethroughtheglassesoffunandenjoythelearningprocess.
15分Therewasonceasmallboywhowouldnevergetdressedwhenhisparentstoldhimto1wouldhewearwhattheywantedhimto.Hepreferredunusualclothesbutaboveallhelikedtakinghistime.Hisparentswerealwaysinarushandwantedhimtobemuch2quickbuttheboydidn'tlikethis3hewouldslowdownevenmore. Onedayhisparentsgotsoangrywhenherefusedtodressthattheytoldhimtogooutwithoutanyclothesatall.4amusetheboyfollowedhisparentsoutofthedoor.Heheldabelief5nobodycoulddoanythingtohim. Astheboystoodoutsidehishousewithnothingonwaitingforhisparents'caralongcamethelocalpigfarmer.Thefarmer6wasalmostdeafhadverypooreyesight.Notonlythatbutalsohe7forgethisglassesthatday.Whenhesawtheboy'spinkskinhethoughtitwasoneofhispigs.Shoutingandpushingthefarmerforced8intoapigcage. Theboybeggedhimtostopbutthedeaffarmercouldn'thear. Whenfoundbyhisparentstheterrifiedboyneveragainwantedtobemistaken9anythingotherthanahumanbeing.Nowhe'sthefirst10getdressedandalwayslooksneat.
计算﹣20﹣|﹣4|＝．
点my1m+1y2都在函数y＝kx+b的图象上若y1﹣y2＝3则k＝．
30分Myname'sJamesandIaman18﹣yearCancerSurvivor.WhenIwas15yearsofageIwasatmyhouseonedaywithmytwosistersandwhenItriedtorunupthestepsIblackedout昏厥and1thestairsveryhard.WhenIcametomyselfIrememberedmysisterssayingAreyoualright?andIrepliedIthinksoyeah.ButlittledidmysistersandIknowthatwasthebeginningofthis2.WhenIbegantotrytoclimbthestairsmywholerightleghurtseriously.Icouldn'tmoveit3theassistanceofmyhands.The4washorrible.IfinallymademywayupstairsandIcouldn't5Icouldn'tmovemyleg.Astimewentonitgot6.SoamonthlaterIfinallywenttohospital.Iexplainedtothedoctorwhathadhappened.ThenIwasaskedtogototherooms7theytreatedmetotheX﹣raysMRIandCATSCANSmachines.Oneweeklatermydoctor8thehouseandsaidYouneedtocomeuphererightaway! MymotherandI9upthereandtheyhadtheX﹣raysresultsreadyforme﹣Mybodyseemed10exceptmyrightleg.Iwassurroundedbydoctorsandnurses.Igotmy11butwasn'tclearonwhatwashappening.They12usbackhome.Threedayslaterthey13anexpertfromanothercontinentorsomeplaceandhelookedatmyX﹣raysonetimeandsaidOHMYGODthisyoungmanhasbonecancer. Onceallofthatgotclearedupthey14mychemotherapy化疗treatmentsaweeklater.OnOctober92014Ihadthesurgerythebonereplacementsurgery.IwastoldthatIcouldn't15likeanormalpersonanymoreso16wasimpossible.Icouldn'tdothisorthatetc.Basicallymy17wasoverbeforeitevengotstarted.WhenIgotthroughwithmyfinalchemotherapyIwas1840kg. IwanttosharethisstorywithyouguysbecausetodayI'm84kgwith2%bodyfat.Idon'tsmokeordrink.Icanwalkandevenrun.I'mso19tobehereandforevertogracelifewithmypresenceeachday.Mydreamistobecomethe20toeverybodywhoeverthoughtaboutgivinguponlifebecauseit'ssohardorjustsimplynotlivingit. 1A.took B.moved C.hit D.climbed 2A.dream B.terror C.day D.memory 3A.without B.from C.with D.for 4A.pain B.change C.danger D.idea 5A.guess B.notice C.believe D.understand 6A.Better B.worse C.stranger D.cleaner 7A.when B.before C.though D.where 8A.found B.searched C.visited D.called 9A.came B.rushed C.looked D.stayed 10A.weak B.confused C.slim D.fine 11A.treatment B.needs C.results D.recovery 12A.followed B.carried C.sent D.directed 13A.flew B.promised C.allowed D.served 14A.continued B.started C.postponed D.cancelled 15A.work B.walk C.think D.feel 16A.playing B.stepping C.running D.learning 17A.plan B.hope C.career D.life 18A.only B.even C.ever D.right 19A.nervous B.relieved C.curious D.grateful 20A.Inspiration B.Instruction C.Introduction D.Information
下列计算中正确的是
某种计时“香篆”在000时刻点燃若“香篆”剩余的长度hcm与燃烧的时间xh之间是一次函数关系h与x的一组对应数值如表所示 1写出“香篆”在000时刻点然后其剩余的长度hcm与燃烧时间xh的函数关系式并解释函数表达式中x的系数及常数项的实际意义 2通过计算说明当“香篆”剩余的长度为125cm时的时刻．
如图抛物线y＝ax2+bx+过点A10B50与y轴相交于点C． 1求抛物线的解析式 2定义平面上的任一点到二次函数图象上与它横坐标相同的点的距离称为点到二次函数图象的垂直距离．如点O到二次函数图象的垂直距离是线段OC的长．已知点E为抛物线对称轴上的一点且在x轴上方点F为平面内一点当以ABEF为顶点的四边形是边长为4的菱形时请求出点F到二次函数图象的垂直距离． 3在2中当点F到二次函数图象的垂直距离最小时在以ABEF为顶点的菱形内部是否存在点Q使得AQBQFQ之和最小若存在请求出最小值若不存在请说明理由．
如图四边形ABCD是平行四边形用直尺和圆规作∠BAD的平分线AG交BC于点E若BF＝6AB＝5则∠AEB的正切值为
已知反比例函数y＝的图象经过点13若x＜﹣1则y的取值范围为
如图△ABD内接于⊙O弦AB不经过圆心O弦DC∥AB延长AB至E使BE＝AB连接ECF是EC的中点连接BF． 1求证＝ 2求证BF＝BD 3若AB＝AD四边形DCEB为平行四边形时求∠DBF的度数．
10分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Λ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. Thefirstdaywegotohighschoolourheadteachertoldusthenewswhichweneededtotakethemilitarytraining.Wewereallshockingatthenewsbecauseofitwassohotoutside.Howterriblyitwas!Thenextdaywemetourtraininginstructorwhowereyoungandhandsome.Hewasstrictbuthumoroustellinghimjokeswhenwerested.Atnightheaskedussingmilitarysongs.Weevencompetedwithotherteams.Thedaysofthemilitarytrainingswerebeautifulandwefoundthetrainingwasnotthathard.Webecamestrongerandmadefriendstoourmilitaryinstructor.
8分Abargainissomethingofferedatalowandadvantageousprice.Amorerecentdefinitionis:abargainisadirtytricktoforcemoneyoutofthepocketsofsillyandinnocentpeople. Thecostofproducinganew﹣forexample﹣toothpastewouldmake80ptheproperpriceforitsowewillmarketitat1.20.Itisnotabadtoothpasteandaspeopleliketotrynewthingsitwillsellwelltostartwith;buttheattractionofnoveltysoonfadessosaleswillfall.Whenthathappenswewillreducethepriceto1.15.Andwewillturnitintoabargainbyprinting5pOFFalloverit. Sometimesitisnot5pOFFbut1pOFF.Whatbreathtakingrudenesstoadvertise1pOFFyoursoaporwashingpowderorwhatever!Eventhepoorestold﹣agepensioneroughttoregardthisasaninsult侮辱buthedoesn't.Abargainmustnotbemissed.Peoplesayonehastohavewashingpowderorwhateverandonemightaswellbuyitapennycheaper. Therealdangerstartswhenunnecessarythingsbecome‘bargains'.Manypeoplejustcannotresistbargains.Providedtheythinktheyaregettingabargaintheywillbuyclothestheywillneverwearorfurnituretheyhavenospacefor.OnceIheardofamanwhoboughtanelectricsaw电锯asabargainandcutofftwoofhisfingersthenextday.Buthehadnoregrets:thesawhadbeentrulycheap. Quiteafewpeopleactuallybelievethattheymakemoneyonsuchbargains.Aladyoncetoldme:I'vehadaluckydaytoday.Iboughtadressfor120reducedfrom400;andIboughtabeautifulPersiancarpetfor600reducedfrom900.Itwillneveroccurtoherthatshehasactuallywasted720.Shefeelsasthoughshehadmade580.ShealsofeelsIamsurethatifshehadmoretimeforshoppingshecouldmakealivingoutofit. Somepeoplebuyinlargequantitiesbecauseitischeaper.Onceacoupleboughtenoughsugarfortheirlifetimeandthelifetimeoftheirchildrenandgrandchildren.Theythoughtitabargainnottobemissed.Whenthesugararrivedtheydidn'tknowwheretostoreit﹣untiltheyrealizedthattheirtoiletwasaveryspaciousone.Sothatwaswheretheypileduptheirsugar.Notonlydidtheirguestsfeelratherstrangewhenevertheywereofferedsugartoputintotheircoffeebutthetoiletbecameextremelysticky. Toofferbargainsisacommercialtricktomakethepoorpoorer.Whengreedyfoolsfallforthistrickitservesthemright. 1Whichwordbestdescribesthelanguagestyleofthepassage? A.Polite. B.Foolish. C.Humorous. D.Serious. 2WhatdoestheunderlinedwordnoveltyinParagraph2probablymean? A.Goodquality. B.Lowprice. C.Newness. D.Curiosity. 3Howdoestheauthorfeelabout1pOFFaproduct? A.It'sagiftforpoorpeople. B.It'sanoffensetoshoppers. C.It'sabargainworthtrying. D.It'sarealreductioninprice. 4Whichstatementwilltheauthorprobablyagreewith? A.Bargainsarethingspeopledon'treallyneed. B.Bargainsareoftenrealcheapproducts. C.Bargainshelppeoplemakealiving. D.Bargainsplaytricksonpeople.
30分MostpeopleneedtohearIloveyou.Onceinawhiletheyhearthemjust1.ImetConniethedayshewas2tothehospiceward病房whereIworkedasa3.HerhusbandBillstoodnervousnearbyasshewas4tothehospitalbed.WhileConniewasinthefinal45ofherfightagainstcancershewas6.Conniewasa7.Aswebecameacquaintedsheconfided吐露how8itwastobemarried32yearstoamanwhooftencalledherasillywoman.IknowBilllovesme.shesaid.Buthehasneverbeenonetosayhelovesmeorsendcardstome.I'dgiveanythingifhe'dsay‘Iloveyou'butit'sjustnotinhis9.SoonwhenConniehadfewer10momentsIbeganspendingmoreofmyvolunteertimewithBill.OnedayIgothimonthe11ofwomenhowweneedromanceinourlivesandhowwelovetogotsentimentalcards.Idon'thavetohesaid.SheknowsIdo!I'msuresheknowsIsaidbutsheneedstohearwhatshehas12toyoualltheseyears.Pleasethinkaboutit.TwodayslaterIwalkeddownthehospicewardatnoon.TherestoodBillleaning13thewallinthehallwayandstaringatthefloor.IalreadyknewConniehad14at11a.m.WhenIsawBill.hisfacewaswetwith15andhewas16.HesaidIhavetosayhowgoodIfeelabouttellingher.Hestoppedto57hisnose.ThismorningItoldherhowmuchIlovedherandlovedbeingmarriedtoher.You58haveseenhersmile!IwentintotheroomtosaygoodbyetoConnie.ThereonthebedsidetablewasalargeValentine19fromBill20:TomywonderfulwifeIloveyou.1A.ontime B.attimes C.intime D.behindtime2A.allowed B.admitted C.committed D.acknowledged3A.nurse B.cleaner C.doctor D.volunteer4A.translated B.transferred C.transformed D.transported5A.step B.stage C.state D.stair6A.anxious B.worried C.frightened D.cheerful7A.reminder B.performer C.romantic D.hostess8A.disturbing B.shocking C.annoying D.frustrating9A.nature B.mind C.1ife D.style10A.sleeping B.yawning C.waking D.crying11A.lesson B.subject C.point D.focus12A.shown B.explained C.expressed D.meant13A.on B.by C.against D.over14A.passedby B.passedon C.passeddown D.passedaway15A.sweat B.rain C.tears D.water16A.struggling B.trembling C.sighing D.sinking17A.blow B.touch C.scratch D.rub18A.would B.could C.might D.should19A.card B.gift C.paper D.package20A.telling B.reading C.writing D.announcing
关于x的一元二次方程x2﹣2m﹣1x﹣m2﹣m＝0的根的情况是
25分随着母亲节的临近班级要召开以'感恩母亲'为主题的班会要求大家介绍一下对自己母亲的感激之情.主要内容包括母亲为我们做了什么以及你如何回报她的付出.请结合如上内容以'ThankyoumyMother'为题写一篇发言稿.要求:1.句子通顺语意连贯;2.包括所有提示内容;3字数100字左右ThankyoumyMother!WithMothers'dayaroundthecorner
关于字母a所表示的数下列说法正确的是
一个正方体的表面展开图如图所示则原正方体中字“享”所在面的对面所标的字是
8分Myfifteen﹣year﹣oldsonhasjustreturnedfromabroadwithrollsofexposedfilmandahundreddollarsinuncashedtraveler'schecksandisasleepatthemoment.Hisblueduffel粗呢bagliesonthefloorwherehedroppedit.Obviouslyhepostponedasmuchsleepashecould:whenhewalkedinandwehuggedhiselectricalsystemsuddenlyswitchedoffandheheadeddirectlyforthebedwhereIimaginehebeathisoldrecordofsixteenhours.ItwashisfirsttripoverseassoweeksbeforeitIpressedtravelbooksonhimandatapecassetteofusefulFrenchphrases;drewupalistofpeopletovisit;advisedhimonclothingandotherthings.Attheluggagestorewherewewenttobuyhimasuitcaseheheadedfortheduffelssayingthatsuitcasesweremoreforoldpeople.Duringthetriphecalledhomethreetimes:fromLondonParisandavillagenamedUllapool.NearUllapoolheclimbedamountaininarainstormthatalmostblewhimoff.InthevillageamanspoketohiminGaelicandtoopolitetointerruptmysonlistenedtohimfortenorfifteenminutestryingtonodintherightplaces.TheFrenchhelearnedfromthecassettedidn'tholdwaterinParis.TheFrenchhetalkedtoshruggedandwalkedon.WhenmysoncalledIsatdownatthekitchentableandleanedforwardandhungoneveryword.Hisvoicecamethroughclearlythoughtwoofthecallswerelikeship﹣to﹣shorecommunication.WhenIinterruptedhimwithaGreat!oraReally?Iknockedalittleholeinhiscommunication.SoIjustsatandlistened.Ihaveneverlistenedtoatelephonesoattentivelyandwithsomuchpleasure.Itwaswonderfultohearnewsfromhimthatwassonewtome.InmybookhewasthefirstmantolandonthemoonandIknewthatIhadnoadvicetogivehimandthatwhatIhadalreadygivenwasprobablynotmuchhelp.Theunusedchecksarecertainlyevidenceofthat.Youthtravelslight.Nosuitcasenotmuchluggageandaslimexpenseaccountandyethewenttothesceneandcamebacksafely.Isithereamazed.Thenightwhenyourchildreturnswithdustonhisshoesfromacountryyou'veneverseenisanightyouwouldgladlyturnintoaweek.1Duringthetriptheauthor'sson.A.ranoutofmoneyB.hadinadequatesleepC.forgottocallhismotherD.failedtotakegoodpictures2Accordingtothepassagewhichofthefollowingcouldbestdescribetheauthor'sson?A.Politeandcareless.B.Creativeandstubborn.C.Considerateandindependent.D.Self﹣centeredandadventurous.3Whatdoestheunderlinedwordthatinthelastparagraphreferto?A.Itisimportanttolistentoyourchild'sstory.B.It'seasytointerruptthechatwithyourchild.C.Theauthorisproudofhersonlandingonthemoon.D.Thesonnolongerneedsmuchhelpfromhismother.4Whatcanweinferfromthepassage?A.Goodparentsshouldprotecttheirchildrenfrompotentialdangers.B.Theworldisabookandthosewhodonottravelreadonlyonepage.C.It'sanicechoicetogiveachildspacetoexperienceandexplore.D.Communicationbetweenparentsandchildrenisextremelyimportant.
2018年江苏省实现GDP约92500亿元．用科学记数法表示92500是．
8分Perhapsyouthinkyoucouldeasilyaddtoyourhappinesswithmoremoney.Strangeasitmayseemifyou'reunsatisfiedtheissueisnotalackofmeanstomeetyourdesiresbutalackofdesires﹣notthatyoucannotsatisfyyourtastesbutthatyoudon'thaveenoughtastes. Realrichesconsistofwelldevelopedandheartycapacities能力toenjoylife.Mostpeoplearealreadyswamped淹没withthings.Theyeatweargoandtalktoomuch.Theyliveintoobigahousewithtoomanyroomsyettheirhouseoflifeisahut. Yourhouseoflifeoughttobeamansion豪宅aroyalpalace.Everynewtasteeveryadditionalinteresteveryfreshenthusiasmaddsaroom.Hereareseveralroomsyourhouseoflifeshouldhave. Artshouldbeadesireforyoutodevelopsimplybecausetheworldisfullofbeautifulthings.Ifyouonlyunderstoodhowtoenjoythemandfeedyourspiritonthemtheywouldmakeyouashappyastofindplentyofhamandeggswhenyou'rehungry. Literatureclassicliteratureisabeautifulrichlyfurnishedroomwhereyoumightfindmanyanhourofrestandrefreshment.Togainthatlovewouldgotowardmakingyouarichpersonforarichpersonisnotsomeonewhohasalibrarybutwholikesalibrary. MusiclikeMozart'sandBach'sshouldn'tbeabsent.Realrichesareofthespirit.Andwhenyou'vebroughtthatspirituptowhereclassicalmusicfeedsitandmakesyoualittledrunkyouhaveincreasedyourthrillsandbetteredthem.Andlifeisamatterofthrills. Sportswithoutwhichyouremainpoormeanalotinlife.Nomatterwhoyouareyouwouldbemorehumanandyourhouseoflifewouldbebettersupportedagainstthebaddaysifyoucouldanddidplayabit. Whateverroomsyoumightaddtoyourhouseoflifethesecretofenjoyinglifeistokeepadding. 1Theauthorintendstotellusthat. A.truehappinessliesinachievingwealthbyfairmeans B.bighousesarepeople'smostvaluedpossessions C.bighousescaninasensebringrichnessoflife D.truehappinesscomesfromspiritualriches 2Itcanbelearnedfromthepassagethat. A.moremoneybringsmorehappiness B.artisneededtomakeyourhousebeautiful C.literaturecanenrichyourspirituallife D.sportscontributemainlytoyourphysicalfitness 3Whatwouldbethebesttitleforthepassage? A.HouseofLife B.SecretofWealth C.RestandRefreshment D.InterestandEnthusiasm 4Theunderlinedsentenceinthesecondparagraphprobablyimpliesthat. A.howevermateriallyrichtheyneverseemtohesatisfied B.howevermateriallyrichtheyremainspirituallypoor C.thoughtheirhouseisbigtheypreferasimplelife D.thoughtheirhouseisbigitseemstobeacage
10分假定英语课上老师要求同桌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:在错的词下画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. Helloboysandgirls!TodayIamgoingtotalkwithwhatyoushoulddowhenafirealarmgooff.Ifyouhearthealarmstandinlineatthedoorandwaityourteachertoleadyououtside.Stayclosetoyourteacherandclassmate.Don'tpanicorgetoutoflineandtryingtoremainquietandcalmly.Soonthefirefighterswillcomeandputoutafire.Ifit'safalsealarmandthereisnofireyourteacherwillleadusbacktotheclassroom.Ifyounoticethatwhensomeoneismissingandhurttellyourteacherimmediately.
全球已经进入大数据时代大数据bigdata是指数据规模巨大类型多样且信息传播速度快的数据库体系．大数据在推动经济发展改善公共服务等方面日益显示出巨大的价值．为创建大数据应用示范城市我市某机构针对市民最关心的四类生活信息进行了民意调查被调查者每人限选一项下面是部分四类生活信息关注度统计图表请根据图中提供的信息解答下列问题 1本次参与调查的人数是多少 2关注城市医疗信息的有多少人并补全条形统计图 3扇形统计图中D部分的圆心角的度数是多少 4写出两条你从统计图中获取的信息．
如图△ABC中∠ACB＝90°AB＝2BC＝ACD为AB的中点E为BC上一点将△BDE沿DE翻折得到△FDEEF交AC于点G则△ECG的周长是．
某幢楼10户家庭每月的用电量如表所示 那么这10户家庭该月用电量的众数和中位数分别是
如图在边长为4的正方形ABCD中点EF分别是BCCD上的动点且EF＝4G是EF的中点下列结论正确的是
8分Inthemid1950sIwasasomewhatboredearlyadolescentmalestudentwhobelievedthatdoinganymorethannecessarywaswastedeffort.Onedaythisapproachthrewmeintoembarrassment.InMrs.Totten'seighthgrademathclassatCentralAvenueSchoolinAndersonIndianawewerelearningtoaddandsubtractdecimals小数.Ourteachertypicallyassigneddailyhomeworkwhichwouldberecitedinclassthefollowingday.Onmostdaysourgradeswerebasedonouroralanswerstohomeworkquestions.Mrs.Tottenusuallywalkedupanddowntherowsofdesksrequestinganswersfromstudentafterstudentintheorderthequestionshadappearedonourhomeworksheets.Shewouldstarteitheratthefrontorthebackoftheclassroomandworktowardtheotherend.SinceIwasseatednearthemiddleofabout35studentsitwaseasytofigureoutwhichquestionsImighthavetoanswer.ThisparticulartimeIhadcompletedmyusualtwoorthreeproblemsaccordingtomycalculations.WhatIfailedtoexpectwasthatseveralstudentswereabsentwhichthrewoffmyestimate.AsMrs.TottenmadeherwayfromthebeginningoftheclassIdesperatelytriedtodeterminewhichmathproblemIwouldget.ItriedtoworkitoutbeforeshegottomebutIhadbrainfreezeandcouldn'tfunction.WhenMrs.TottenreachedmydesksheaskedwhatanswerI'dgotforproblemNo.14.IIdidn'tgetanythingIansweredandmyfacefeltwarm.Correctshesaid.Itturnedoutthatthecorrectanswerwaszero.WhatdidIlearnthatday?Firstalwaysdoallyourhomework.Secondinreallifeitisn'talwayswhatyousaybuthowyousayitthatmatters.ThirdIwouldnevermakeitasamathematician.IfIcouldchooseoneschooldaythattaughtmethemostitwouldbethatone.1WhatdoestheunderlinedpartinParagraph1indicate?A.Itiswisetovalueone'stime.B.Itisimportanttomakeaneffort.C.Itisrighttosticktoone'sbelief.D.Itisenoughtodothenecessary.2Theauthorcouldworkoutwhichquestionstoanswersincetheteacheralways.A.askedquestionsinaregularwayB.walkedupanddownwhenaskingquestionsC.chosetwoorthreequestionsforthestudentsD.requestedherstudentstofinishtheirusualquestions3Theauthorfailedtogetthequestionshehadexpectedbecause.A.theclassdidn'tbeginasusualB.severalstudentsdidn'tcometoschoolC.hedidn'ttryhardtomakehisestimateD.Mrs.Tottendidn'tstartfromthebackoftheclass4Whichofthefollowingcanbethebesttitleforthepassage?A.AnUnforgettableTeacherB.AFutureMathematicianC.AnEffectiveApproachD.AValuableLesson
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