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如图1所示为“探究加速度与物体所受合外力的关系”的实验装置图．图中A为小车，质量为m1，连接在小车后面的纸带穿过打点计时器B，它们均置于一端带有定滑轮的足够长的木板上，P的质量为m2，C为弹簧测力计...
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高三下学期物理《》真题及答案
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2013·北京朝阳区高三期中物理课上老师利用图甲所示的装置探究了加速度与力的关系得到加速度与物体所受
如图甲所示.用一水平外力F.拉着一个静止在倾角为θ的光滑斜面上的物体.逐渐增大F.物体做变加速运动其
斜面的倾角
加速度为2m/s2时物体所受的合外力
物体静止在斜面上所施加的最小外力
加速度为4m/s2时物体的速度
某实验探究小组为了探究物体的加速度与所受合外力之间的关系设计了如图a所示的实验装置.该实验小组成员用
用如图3－3－9所示的装置来探究物体的加速度与力质量的关系.实验时小盘和砝码牵引小车使小车做初速度为
某同学通过实验探究加速度与物体所受合力F.及质量m的关系.1该同学组装的实验装置如图a所示请写出该装
关于速度加速度合外力之间的关系正确的是
物体的速度越大，则加速度越大，所受的合外力也越大
物体的速度为零，则加速度为零，所受的合外力也为零
物体的速度为零，但加速度可能很大，所受的合外力也可能很大
物体的速度很大，但加速度可能为零，所受的合外力也可能为零
用如实图4-1所示的装置来探究物体的加速度与力质量的关系.实验时小盘和砝码牵引小车使小车做初速度为零
物理课上老师利用图甲所示的装置探究了加速度与力的关系得到加速度与物体所受合力成正比的结论某同学在实验
小明在实验室采用如图所示装置探究物体的加速度a与物体所受外力F.物体质量M.间的关系时设小车及车中的
某同学用如图所示实验装置探究加速度与物体质量物体所受力的关系.滑道水平用钩码所受的重力作为滑块所受的
关于速度加速度合外力之间的关系正确的是
物体的速度越大，则加速度越大，所受的合外力也越大
物体的速度为零，则加速度为零，所受的合外力也为零
物体的速度为零，但加速度可能很大，所受的合外力也可能很大
物体的速度很大，但加速度可能为零，所受的合外力也可能为零
探究物体的加速度与力质量的关系实验如下1在探究物体的加速度与力的关系时应保持不变改变施加在物体上的水
用如下图所示的装置来探究物体的加速度与力质量的关系.实验时小盘和砝码牵引小车使小车做初速度为零的匀加
用如图所示的装置做实验研究在物体质量不变时其加速度与合外力的关系1实验中用打点计时器在纸带上打出一系
关于力与运动的关系下列说法正确的是
物体的速度越大，则加速度越大，所受的合外力也越大
物体的速度为零，则加速度为零，所受的合外力也为零
物体的速率不变，则其所受合力必为零
物体的速度不断增大，表示物体必受力的作用
某同学用如图所示实验装置来探究加速度与物体质量物体所受力的关系.滑道水平用钩码所受的重力作为滑块所受
某实验小组应用如图甲所示装置探究加速度与物体受力的关系已知小车的质量为M.砝码及砝码盘的总质量为m所
物体做曲线运动的条件为
物体所受合外力为变力
物体所受合外力方向与加速度方向不在同一直线上
物体所受合外力方向与速度方向不在同一直线上
物体的加速度与速度方向不在同一直线上
在探究物体的加速度a与物体所受外力F.物体质量M.间的关系时采用如图所示的实验装置.小车及车中的砝码
为了探究力质量与加速度三个物理量之间的定量关系可以在质量一定的情况下探究物体的加速度与的关系再在物体
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Hundredsofpeoplehaveformedimpressionsofyouthroughthatlittledevice装置onyourdesk.Andthey'veneveractually41you.Everythingtheyknowaboutyou42throughthisdevicesometimesfromhundredsofmilesaway.43heyfeeltheycanknowyou44fromthesoundofyourvoice.That'showpowerfulthe45is.Powerfulyesbutnotalways46.ForyearsIdealtwithmytravelagentonlybyphone.RanimyfacelessagentwhomI'dnevermet47gotmerock﹣bottompricesonairfarescarsandhotels.Buthercoldvoicereally48me.Isometimeswishedto49anotheragent.OnemorningIhadto50animmediateflighthomeforafamilyemergency.IranintoRani'soffice51.Thewomansittingatthedesk52mymadnesssympatheticallyjumpedup.Shegavemea53smilenoddedwhilelisteningpatientlyandthenprintedoutthe54immediately.'Whatawonderfullady!'Ithought.Rushingout55Icalledoutovermyshoulder'Bythewaywhat'syourname?''I'mRani'shesaid.Iturnedaroundandsawa56womanwithabigsmileonherfacewavingtowishmeasafetrip.Iwas57!WhyhadIthoughtshewascold?Raniwaswellso58.SittingbackinthecaronthewaytotheairportIfigureditallout.Rani's59﹣﹣﹣herwarmsmilehernodsher‘I'mhereforyou'60﹣﹣﹣wereallsilentsignalsthatdidn'ttravelthroughwires.41.A.accepted B.noticed C.heard D.met42.A.came B.moved C.ran D.developed43.A.Thus B.Yet C.Then D.Indeed44.A.rather B.also C.just D.already45.A.Telephone B.voice C.connection D.impression46.A.direct B.useful C.easy D.accurate47.A.inperson B.bymyself C.inpublic D.onpurpose48.A.annoyed B.interested C.discouraged D.confused49.A.promote B.train C.find D.know50.A.arrange B.postpone C.confirm D.book51.A.forthefirsttime B.atanytime C.fromtimetotime D.ingoodtime52.A.expecting B.seeing C.testing D.avoiding53.A.shy B.comforting C.familiar D.forced54.A.bill B.form C.ticket D.list55.A.hopefully B.disappointedly C.gratefully D.regretfully56.A.careful B.serious C.nervous D.pleasant57.A.amused B.worried C.helpless D.speechless58.A.calm B.nice C.proud D.clever59.A.forgiveness B.eagerness C.friendliness D.skillfulness60.A.explanation B.attitude C.concept D.Behavior
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. 删除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. Thesummerholidayiscoming.MyclassmatesandIaretalkingabouthowtododuringtheholiday.Wecanchosebetweenstayingathomeandtakeatrip.Ifwestayathomeitiscomfortablebutthereisnoneedtospendmoney.Butinthatcasewewilllearnlittleaboutworld.Ifwegoonatripabroadwecanbroadenyouviewandgainknowledgeswecannotgetfrombooks.Someclassmatessuggestwecangotoplacesofinterestnearby.Ithoughtthatitisagoodidea.Itdoesnotcostmanyyetwecanstilllearnalot.
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AnewcollectionofphotosbringsanunsuccessfulAntarcticvoyagebacktolife.FrankHurley'spictureswouldbeoutstanding﹣﹣﹣﹣undoubtedlyfirst﹣ratephoto﹣journalism﹣﹣﹣iftheyhadbeenmadelastweek.Infacttheywereshotfrom1914through1916mostofthemafteradisastrousshipwreck海难byacameramanwhohadnoreasonableexpectationofsurvival.Manyoftheimageswerestoredinanicechestunderfreezingwaterinthedamagedwoodenship.TheshipwastheEnduranceasmalltightNorwegian﹣builtthree﹣masterthatwasintendedtotakeSirErnestShackletonandasmallcrewofseamenandscientists27meninalltothesouthernmostshoreofAntarctica'sWeddellSea.FromthatpointShackletonwantedtoforceapassagebydogsled雪橇acrossthecontinent.ThejourneywasintendedtoachievemorethanwhatCaptainRobertFalconScotthaddone.CaptainScotthadreachedtheSouthPoleearlyin1912buthaddiedwithhisfourcompanionsonthemarchback.AswriterCarolineAlexandermakesclearinherforcefulandwell﹣researchedstoryTheEnduranceadventuringwaseventhenathoroughlycommercialeffort.Scott'slastjourneycompletedasbelayinatentdyingofcoldandhungercaughttheworld'simaginationandafilmmadeinhishonordrewcrowds.ShackletonaonetimeBritishmerchant﹣navyofficerwhohadgottowithin100milesoftheSouthPolein1908startedabusinessbeforehis1914voyagetomakemoneyfrommovieandstillphotography.FrankHurleyaconfidentandgiftedAustralianphotographerwhoknewtheAntarcticwashiredtomaketheimagesmostofwhichhaveneverbeforebeenpublished.33.WhatdoweknowaboutthephotostakenbyHurley?A.TheyweremadelastweekB.TheyshowedunderseasceneriesC.TheywerefoundbyacameramanD.Theyrecordedadisastrousadventure34.WhoreachedtheSouthPolefirstaccordingtothetext?A.FrankHurleyB.ErnestShackletonC.RobertFalconScottD.CarolineAlexander35.WhatdoesAlexanderthinkwasthepurposeofthe1914voyage?A.ArtisticcreationB.ScientificresearchC.MoneymakingD.Treasurehunting.
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铜～锌原电池如图所示电解质溶液为稀硫酸下列说法不正确的是
根据金属活动顺序表Cu不能发生如下反应Cu+2H2O＝CuOH2↓+H2↑．但选择恰当电极材料和电解液进行电解这个反应就能变为现实．下列四种电极材料和电解液中能实现该反应最为恰当的是
Readingcanbeasocialactivity.Thinkofthepeoplewhobelongtobookgroups.Theychoosebookstoreadandthenmeettodiscussthem.NowthewebsiteBookCrossing.comBookCrossing.comturnsthepageonthetraditionalideaofabookgroup.Membersgoonthesiteandregisterthebookstheyownandwouldliketoshare.BookCrossingprovidesanidentificationnumbertostickinsidethebook.Thenthepersonleavesitinapublicplacehopingthatthebookwillhaveanadventuretravelingfarandwidewitheachnewreaderwhofindsit.BrucePedersonthemanagingdirectorofBookCrossingsays'Thetwothingsthatchangeyourlifearethepeopleyoumeetandbooksyouread.BookCrossingcombinesboth.'Membersleavebooksonparkbenchesandbusesintrainstationsandcoffeeshops.Whoeverfindstheirbookwillgotothesiteandrecordwheretheyfoundit.Peoplewhofindabookcanalsoleaveajournalentrydescribingwhattheythoughtofit.E﹣mailsarethensenttotheBookCrossingtokeepthemupdatedaboutwheretheirbookshavebeenfound.Brucepetersonsaystheideaisforpeoplenottobeselfishbykeepingabooktogatherdustonashelfathome.BookCrossingispartofatrendamongpeoplewhowanttogetbacktothe'real'andnotthevirtual虚拟.Thesitenowhasmorethanonemillionmembersinmorethanonehundredthirty﹣fivecountries.29.Whydoestheauthormentionbookgroupsinthefirstparagraph?A.Toexplainwhattheyare.B.TointroduceBookCrossing.C.Tostresstheimportanceofreading.D.Toencouragereaderstosharetheirideas.30.Whatdoestheunderlinedword'it'inParagraph2referto?A.Thebook.B.Anadventure.C.Apublicplace.D.Theidentificationnumber.31.WhatwillaBookCrosserdowithabookafterreadingit?A.Meetotherreaderstodiscussit.B.Keepitsafeinhisbookcase.C.Passitontoanotherreader.D.Mailitbacktoitsowner.32.Whatisthebesttitleforthetext?A.OnlineReadingAVirtualTourB.ElectronicBooksAnewTrendC.ABookGroupBringsTraditionBackD.AWebsiteLinksPeoplethroughBooks.
已知NH3和HCl都是能用来做喷泉实验的气体．若在同温同压下用等体积烧瓶一个收集满NH3另一个收集HCl和N2的混合气体如图所示．喷泉实验停止后两个烧瓶内溶液的关系是不考虑烧瓶内溶质的扩散氨水的溶质按NH3计算
Ifyoufeelstressedbyresponsibilitiesatworkyoushouldtakeastepbackandidentify识别thoseof61greatandlessimportance.Thenhandlethemostimportanttasksfirstsoyou'llfeelarealsenseof62achieve.Leavingthelessimportantthingsuntiltomorrow63beoftenacceptable.Mostofusaremorefocused64ourtasksinthemorningthanwearelaterintheday.Sogetanearlystartandtrytobeasproductive65possiblebeforelunch.Thiswillgiveyoutheconfidenceyouneedtogetyouthroughtheafternoonandgohomefeelingaccomplished.Recent66studyshowthatwearefarmoreproductiveatworkifwetakeshortbreaks67regular.Giveyourbodyandbrainarestbysteppingoutsidefor68whileexercisingordoingsomethingyouenjoy.Ifyoufindsomethingyoulovedoingoutsideoftheofficeyou'llbelesslikely69bringyourworkhome.Itcouldbeanything﹣gardeningcookingmusicsports﹣butwhateveritis70makesureit'sarelieffromdailystressratherthananotherthingtoworryabout.
6分AfewthingstoconsiderbeforebookingaflightWithfuelcostsrisingandairlinesfindingmorefeestoimposeontravelerseverydayairfareisn'tgettinganycheaper.Sinceyoucan'tdrivetoallyourdreamdestinationsflyingistheonlywaytogosometimesandundeniablythefastest.Luckilythereareplentyofwaystofindthemostaffordablefaresandalsoavoidpayingasmanyextrachargesaspossiblewhenyouplanahead.GettingthebestfareAirlinesputouttheirfaresalesonTuesdaymorningmakingthisdaythebestdaytobookaflightforless.Flyduringtheleastpopulartimes.TuesdayWednesdayandSaturdayaretheslowestdaystoflywhichmeanscheaperdealsthantherestoftheweek.Youcanalsofindreducedratesonearlymorningflightssincemanypeopledon'tliketogetupbeforethesuntogettotheairport.Earlierboardingtimescanalsoconsiderablycutdownyourchancesofgettingbumpedonanoverbookedflightordelayedbecauseofotherdelayedflightsormechanicalissues.Chooseyourseatlater.Someairlineschargeyoutopickyourseatwhenyoubookonlineaddingevenmoretothebottomlineofyourticketcost.Ifyoushowupearlyonyourtraveldayyoucanstillgetsuitableseats.Someofthebestseatsgetheldbackuntilflightdayunlessothersarewillingtopayextraforthemaheadoftimesoyoustillhavethechanceatoneofthose.Flyonholidays.Youalreadyknowthatsummeristhemostexpensivetimetoflyandeventhoughmostothertimesaremoreaffordablethedayssurroundingholidayscanbecrazy.Savebigifyou'rewillingtotravelonmajorholidayssuchasThanksgivingandChristmas.Don'twaituntilthelast﹣minutetobook.Manytravelersdon'tknowthatthere'sasweetspotforbookingandgettingthebestpriceonyourtickets.Booktooearlyortoolateandyoucouldenduppayingmorethanyouneedto.Thebesttimetobookisbetweenthreemonthsandsixweeksfromwhenyouwanttotravel.AvoidingextrafeesAirlineswillchargeforjustaboutanythingthesedays.Somehaveeventoyedaroundwithchargingcustomersforusingtherestroom.Allthoseextrafeescancertainlyaddupbutthere'snoreasontopaythemifyoudon'thaveto.Herearesometipstokeepmoneyinyourwalletonceyougettotheairport.Avoidtheupgradeit'snotnecessary.Sometimesupgradesarefreebutmostlyyouwillbechargedforseekingalast﹣minutebumptofirstclassandthecostcanbehefty.Flycarry﹣ononly.Baggagefeesvarywildlybutalmostallairlineschargethemandchargebig.Whypayforyourclothestoflywithyou?Ifeveryoneinyourtravelpartychecksabagyourbillcanbeastronomicalbeforeyoueverevengettoyourdestination.It'seasytoreducetheamountofstuffyoupackMakesureallyourclothingcoordinatessoyoucantakelessandstillmakemoreoutfitcombinationstakeonlytwopairofshoesplantodoabitoflaundryonyourtripandbringonlytravel﹣sizedtoiletries.Packyourownsnacks.Unlessyou'reflyinginternationallyit'srareyourflightcomeswithafreemeal.Snacksontheplanearenotcheapandalmostneverhealthy.Don'trelyonwhat'sonthesmallmenuandinsteadtucksomeofyourownsnacks﹣granolabarshomemademuffinsfruitandtrailmixallmakefantastictravelfoods﹣intoyourbagandeatalotbetterandcheaperthanotherpassengers.Doyouhaveatriedandtruemethodofgettingthebestdealonyourflights?Letusknow.1TosavemoneywhichoneshouldNOTbethechoice?A.EarlymorningflightsB.EarlyboardingtimesC.TheflightsonSaturdayD.TheflightsonSummerholiday2Accordingtothepassagewhichoneisright?A.Ifyoushowupearlyonyourtraveldayyoucangetthebestseats.B.Youcansavebigifyou'rewillingtotravelonChristmaseve.C.Youwillbechargedforseekingtheupgradesandthecostcanbehigh.D.Ifyou'reflyinginternationallyyourflightwillcomewithafreemeal.3Accordingtothepassageyoucandothethingsexcepttoavoidextrafees.A.Usetherestroom.B.TuckyourownsnacksC.Flywithcarry﹣ononly.D.Avoidtheupgrade.
在一次连环交通事故中只有一个人需要负主要责任但在警察询问时甲说“主要责任在乙”乙说“丙应负主要责任”丙说“甲说的对”丁说“反正我没有责任”四人中只有一个人说的是真话则该事故中需要负主要责任的人是
20分FewAmericansstayinoneplaceforalifetime.We1fromthecitytothesuburbsfromhighschooltocollegeinadifferentstatefromajobinoneregiontoabetterjob2fromthehomewherewe3ourchildrentothehomewhereweplantolivein4.Witheachmoveweare5makingnewfriendswhobecomepartofournewlife.Formanyofusthe6isaspecialtimeforformingnewfriendships.TodaymillionsofAmericansgoonvocation7andtheygonotonlytoseenewsightsbutalso﹣inthoseplaceswheretheydonotfeeltoo8﹣withthehopeofmeetingnewpeople.Noonereally9avacationtriptoproduceaclosefriendbutthebeginningofafriendshipispossible.Surelyineverycountrypeople10friendship?Theword'friend'toAmericanpeoplecanbe11toawiderangeofrelationships﹣tosomeoneonehasknownforafewweeksinanewplacetoaclosebusinesscompaniontoachildhoodplaymatetoamanorwomantoa12colleague.Therearereal13amongtheserelationsforAmericans﹣afriendshipmaybe14casualsituationalordeepandlasting.ButtoaEuropeanwhoseesonlyoursurfacebehaviorthedifferencesarenotclear.AsEuropeansseeitallkindsof'friends'flow15ofAmericans'homeswithlittleceremony.Theymaybeparentsofthechildren'sfriendshouseguestsofneighborsmembersofacommitteebusinessassociatesfromanothertownorevenanothercountry.16asaguestintoanAmericanhometheEuropeanvisitorfindsno17differences.Theatmosphereis18.Mostpeopleoldandyoungarecalled19firstnames.Americans'characteristicopennesstodifferentstylesofrelationshipmakesitpossibleforustofindnewfriendsabroadwithwhomwefeel20.1A.drive B.commute C.move D.settle2A.abroad B.elsewhere C.somewhere D.nowhere3A.deliver B.protect C.educate D.raise4A.retirement B.death C.illness D.sadness5A.mostly B.mainly C.rarely D.forever6A.winter. B.summer C.spring D.autumn7A.along B.freely C.together D.abroad8A.alone B.strange C.scared D.remote9A.allows B.desires C.expects D.imagines10A.form B.develop C.ignore D.value11A.used B.applied C.stuck D.dedicated12A.kind B.generous C.trusted D.helpful13A.differences B.varieties C.distinctions D.diversities14A.informal B.reliable C.shallow D.fragile15A.inandout B.onandon C.byandby D.upanddown16A.Moving B.Flowing C.Going D.Coming17A.obvious B.heavy C.apparent D.strong18A.weird B.stressed C.relaxed D.strange19A.with B.on C.for D.by20A.atbest B.athome C.atheart D.athand
Agardenthat'sjustrightforyouHaveyouevervisitedagardenthatseemedjustrightforyouwheretheatmosphereofthegardenappearedtototalmorethanthesum总和ofitsparts?36.Butitdoesn'thappenbyaccident.Itstartswithlookinginsideyourselfandunderstandingwhoyouarewithrespecttothenaturalworldandhowyouapproachthegardeningprocess.●37Somepeoplemaythinkthatagardenisnomorethanplantsflowerspatternsandmassesofcolor.Othersareconcernedaboutusinggardeningmethodsthatrequirelesswaterandfewerfertilizers肥料.38.Howeverthereareanumberofotherreasonsthatmightexplainwhyyouwanttogarden.Oneofthemcomesfromourearliestyears.●Recall回忆yourchildhoodmemoriesOurmodelofwhatagardenshouldbeoftengoesbacktochildhood.Grandma'srosegardenandDad'svegetablegardenmightbegoodorbadbutthat'snotwhat'simportant.39﹣﹣howbeinginthosegardensmadeusfeel.Ifyou'dliketobuildapowerfulbondwithyourgardenstartbytakingsometimetorecallthegardensofyouryouth.40thengooutsideandworkoutaplantotranslateyourchildhoodmemoriesintoyourgrown﹣upgarden.Havefun.A.KnowwhyyougardenB.FindagoodplaceforyourowngardenC.It'sourexperienceofthegardenthatmattersD.It'sdelightfultoseesomanybeautifulflowersE.StillothersmaysimplyenjoybeingoutdoorsandclosetoplantsF.YoucanproducethatkindofmagicalqualityinyourowngardentooG.Foreachofthosegardenswriterdownthestrongestmemoryyouhave.
假定你是李华你校摄影俱乐部photographyclub将举办国际中学摄影展.请给你的英国朋友Peter写封信.请他提供作品.信的内容包括 1.主题环境保护 2.展览时间 3.投稿邮箱intlphotoshow@gmschool.com. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯.
Sciencefictionsofthe1960sand1970spredictedthatpillswouldreplacemealsastheway_______peoplewouldgetthefueltheyneeded. A./ B.which C.How D.where
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