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用如图1所示装置做探究物体的加速度跟力的关系”的实验实验时保持小车的质量不变，用钩码所受的重力作为小车受到的合力，用打点计时器和小车后端拖动的纸带测出小车运动的加速度． （1）实验时先不挂钩码，...
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高三下学期物理《》真题及答案
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某同学采用如图１所示的装置探究物体的加速度与所受合力的关系用砂桶和砂的重力充当小车所受合力F.通过分
（1）和（4）
（2）和（3）
（1）和（3）
（2）和（4）
在探究加速度与力质量关系的实验中1某小组的几位同学在讨论制定实验方案时分别提出以下几点意见你认为不正
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
在探究加速度与力质量的关系实验中采用如图4－15所示的实验装置小车及车中砝码的质量用M.表示盘及盘中
在探究加速度与力质量的关系实验中采用如图所示的实验装置小车及车中砝码的质量用M.表示盘及盘中砝码的质
某同学采用如图1所示的装置探究物体的加速度与所受合力的关系用砂桶和砂的重力充当小车所受合力F.通过分
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
用如图甲所示装置做探究物体的加速度跟力的关系的实验.实验时保持小车的质量不变用钩码所受的重力作为小车
在探究加速度与力质量的关系实验中为了探究加速度与力的关系应保持不变测量物体在不同力的作用下的加速度分
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
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
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
在探究加速度与力质量的关系的实验中采用如图所示的实验装置小车及车中砝码的质量用M.表示盘及盘中砝码的
某同学用如图甲所示的装置做物体质量一定时探究加速度与物体受力的关系实验①用游标卡尺测出正方体垫木a的
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1所示装置做探究物体的加速度跟力的关系的实验.实验时保持小车的质量不变用钩码所受的重力作为小车
用图甲所示的实验装置做探究加速度与力质量的关系实验小车放在木板上小车前端系一条细绳绳的一端跨过定滑轮
在探究加速度与力质量的关系的实验中小车及车中砝码的质量用M.表示盘及盘中砝码的质量用m表示小车的加速
如图乙所示是用DIS实验系统探究物体的加速度与力和质量的关系实验装置①为了使小车所受的合力等于绳子的
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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仔细阅读下面例题解答问题 例题已知二次三项式x2﹣4x+m有一个因式是x+3求另一个因式以及m的值． 解设另一个因式为x+n得 x2﹣4x+m=x+3x+n 则x2﹣4x+m=x2+n+3x+3n ∴． 解得n=﹣7m=﹣21 ∴另一个因式为x﹣7m的值为﹣21 问题仿照以上方法解答下面问题 已知二次三项式2x2+3x﹣k有一个因式是2x﹣5求另一个因式以及k的值．
用适当的方法解下列方程x²-4x-12=0
10分文中共有10处错误每句中最多有两处.错误涉及一个词的增加删除或修改.增加:在缺词处加一个漏词符号/\并在此符号下面写出该加的词. 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. OnalatersummereveningmyfatherandIwaswalkinghappilyhome.Wehavejusthadabigmealinarestaurantnearourhome.AswewerewalkingslowlydownthestreetIaskedmyfatherinalowvoiceWhatdoestheword'drunk'mean?That'seasilyboysaidmyfather.Doyouseethesetwopolicemenoverthere?IfIlookatthemIseefourinsteadtwoandI'mdrunk.Understand?HearingatthisIpretendedtobepuzzledandsaidMyGodandtherearesixpolicemenoverthere.Can'tyousee?Myfatherlookedatmeingreatsurprised.Youarereallydrinkson.
1分Hehassfromaseriousillnessforsevenyears.
8分Sureit'sgoodtogetalongwellwithyourteacherbecauseitmakesthetimeyouspendintheclassroommorepleasant. Andyesit'sgoodtogetalongwellwithyourteacherbecauseingeneralit'ssmarttolearnhowtogetalongwellwiththedifferenttypesofpeopleyou'llmeetthroughoutyourlife. Infactkidswhogetalongwellwiththeirteachersnotonlylearnmorebutthey'remorecomfortablewithaskingquestionsandgettingextrahelp.Thismakesiteasierforthemtounderstandnewmaterialsandmakesthemdotheirbestontests.Whenyouhavethiskindofrelationshipwithateacherheorshecanbesomeonetoturntowithproblemssuchasproblemswithlearningorschoolissues问题. Hereisaquestion:Whatifyoudon'tgetalongwithyourteachers?Infactteacherswanttogetalongwellwithyouandenjoyseeingyoulearn.Butteachersandstudentssometimeshavepersonalityclashes个性冲突whichcanhappenbetweenanytwopeople.Ifyoushowyourteacherthatyouwanttomakethesituationbetterheorshewillprobablydoeverythingpossibletomakethathappen.Bydealingwithaproblemlikethisyoulearnsomethingabouthowtogetalongwithpeoplewhoaredifferentfromyou. Howeverifacertainteacherisn'tyourfavoriteyoucanstillhaveasuccessfulrelationshipwithherorhimespecially________.Herearesomeofthoseresponsibilities责任: Attendclassreadytolearn. Bepreparedforclasswiththerightstationerybooksandcompletedassignments作业. Listenwhenyourteacheristalking. Doyourbestwhetherit'saclassroomassignmenthomeworkoratest.. 25.Accordingtothepassagegettingalongwellwithyourteacherswillmakeyou. A.havenoproblemswithstudy B.getabetterseatintheclassroom C.getthebestscoresintheexams D.havemorepleasanttimeintheclassroom 26.Theunderlinedwordthatinthefourthparagraphrefersto. A.thehappytimeyouhaveintheclassroom B.gettingalongverywellwithclassmates C.abetterrelationshipbetweenyouandyourteacher D.thedisappearanceofpersonalitydifferences 27.Whichofthefollowingcanbefilledintheblank? A.ifyoufulfill履行yourbasicresponsibilitiesasastudent B.ifyouarethoughtofasagoodstudent C.ifyouknowsomebasicsocialskills D.ifyouareeasygoingandhelpful 28.Whatdoesthepassagemainlytalkabout? A.Theimportanceoffriendshipinschools. B.Theimportanceofagoodrelationshipwithyourteachers. C.Studyingskillsforstudents. D.Usefulskillstogetalongwellwithyourteachers.
已知抛物线y=-x-2²的图象上有两点x1y1和x2y2且x1＞x2＞2则y1与y2的大小关系是
某校兴趣小组想测量一座大楼AB的高度．如图大楼前有一段斜坡BC已知BC的长为24米它的坡度i=1．在离C点80米的D处用测角仪测得大楼顶端A的仰角为37°测角仪DE的高为1.5米求大楼AB的高度约为多少米结果精确到0.1米 参考数据sin37°≈0.60cos37°≈0.80tan37°≈0.75≈1.73
8分Apaperclipmadeofsteelwirebentintoalooped环形的shapeisaninstrumentusedtoholdsheetsofpapertogether.Thiscommondeviceisawonderofsimplicityandfunction.Butwheredidthissimplecheapandpracticalinventioncomefrom? Inthelate19thcenturythemostcommonwaytoholdpaperstogetherwasbyusingapin.Althoughthepinwasaninexpensivetoolandwaseasilyremovableitwould1eaveholesinthepaper.Laterassteelwirebecamemorecommoninventorsbegantonoticeitselastic有弹性的feature.Withthisfeatureitcouldbestretchedandtwistedintovariousclip﹣likeobjects.Intheyearsjustbefore1900quiteafewpaperclipdesignsappeared.ThenamemostfrequentlyassociatedwiththepaperclipinventionisJohanVaaleraNorwegianinventor.HoweverVaaler'sclipswerenotthesameasthepaperclipscurrentlyinuse.Specificallytheydidnothavetheinsideloopweseetoday.ThefamiliarloopeddesignwasinventedbyGemManufacturingLtd.inEngland.ThisclipisthereforesometimesknownastheGemclip. BecauseofVaalerthepaperclipplayedanimportanthistoricalroleinNorway.DuringWorldWarIINorwaywasoccupiedbytheNazis.Norwegianswereprohibitedfromwearinganysymboloftheirnationalunity团结suchasbuttonswiththeinitialsoftheirking.Thusinprotesttheystartedwearingpaperclipstoshowtheirunity.Thereasonfordoingthiswassimple:PaperclipswereaNorwegianinventionwhoseoriginalfunctionwastobindtogether.AfterthewaragiantpaperclipstatuewasputupinOslotohonourVaaler﹣eventhoughhisdesignwasneveractuallyproduced. 1.Accordingtothefirstparagraphthepaperclipis. A.madeofpaper B.forholdingclothestogether C.shapedlikeapin D.inexpensiveanduseful 2.Onewaythepaperclipisbetterthanthepinisthat A.itischeaper B.itissimpler C.itdoesn'tdamagethepaper D.itcanberemovedmoreeasily 3.WhichofthefollowingbestshowswhattheGemcliplookslike? 4.Thelastparagraphismainlyabout. A.howwidelyusedVaaler'sclipis B.howVaaler'sclipbecameanationalsymbol C.howtheNazisruledtheNorwegianpeople D.whyNorwegianshadtheinitialsoftheirkingontheirbuttons
8分Caneatingachocolatebareverydayreallypreventage﹣relatedmemoryloss?No.Butanewresearchshowsthatlargeamountsofflavones黄酮substancesfoundincocoateaandsomekindsofvegetablesmayimproveage﹣relatedmemoryfailure. Dr.ScottSmallisaprofessorofneurology神经学atColumbiaUniversityinnewYorkCityHeistheleadwriterofaresearchpaperdescribingtheeffectsofcocoaflavonesonbrainactivityHisstudyinvolved37volunteersagedbetween50and69.Researchersgavethemahigh﹣levelflavonesdrinkmadefromcocoabeansoralow﹣levelflavonesdrink.Foraperiodofthreemonthssomesubjectsgot900milligramsofflavonesaday.Theothersgot10milligramsofflavoneseachday.BrainimagingandmemorytestsweregiventoeachstudysubjectbeforeandafterthestudyDr.Smallsaysthatthesubjectswhohadthehigh﹣levelflavonesdrinkshowedmuchimprovementonmemorytests. Theresearcherswarnthatmoreworkisneededtobedonebecausethisstudywasperformedonlyonasmallgroup.Dr.JoannMansonistheleadresearcherofafour﹣yearstudyinvolving18000adults.Thisstudywilluseflavonescapsules.Thestudysubjectswillbedividedintotwogroupsandwilltaketwopillsperday.Thecapsulesusedwillalllookthesame.Butonegroup'scapsuleswillcontainflavoneswhiletheothergroupwilltakecapsulesmadeofaninactivesubstanceorplacebo安慰剂. Dr.Mansonsaysit'snotnecessaryforpeopletostarteatingmorechocolatebecause3personwouldhavetoeatahugeamountofchocolatetogetthesamelevelofflavonesgiventotheLestsubjects.Headdsmanymanufacturershaveplannedtoremovetheflavonesfromtheirchocolateproducts.SimilarityDr.saysacocoa﹣basedflavonesextract提取maybedevelopedinthefutureButhesaysthatmorestudiesareneededtoseehowmuchflavonesisgoodforourhealth. 1.WhatwasdonetothesubjectsalterDr.Small'sstudy? A.Theywereaskedtotakeahigh﹣levelflavonesdrink B.Theyweregivenbrainimagingandmemorytests C.Theyweregivencapsulescontainingflavones D.Theywereaskedtotaketwopillsofflavonescapsulesperday 2.What'sthesimilarityofthetwoexperiments? A.Bothusehigh﹣levelflavonescapsules B.Thenumberofthesubjectsisthesame C.Drinksandplacebosareusedinbothexperiments D.Thesubjectsaredividedintotwogroupsinbothexperiments 3.WhywillDr.Mansoncarryoutthefour﹣yearstudy? A.Tocarryouttheexperimentfurther B.Toprovethefirstexperimentiswrong C.Totesthowmuchflavonescanimproveourmemory. D.Toshoweatingchocolateisbettertoimprovememory. 4.Whatcanwelearnfromthelastparagraph? A.It'snotnecessaryforustoeatchocolate B.Inthefuturewecangetflavoneswithouteatingchocolate C.Themoreweeatflavonesthebetterourhealthwillbe D.It'seasyforpeopletogetthesamelevelofflavonesgiventothetestsubjects
30分 TheWorldAlwaysMakesWayfortheDreamer WhenIwastwelveyearsoldmyfathertookmetoseeZigZigler.IremembersittinginthatdarkhalllisteningtoMr.Zigler1everyone'sspiritsuptotheceiling.I2therefeelinglikeIcoulddoanything.WhenwegottothecarIturnedtomyfatherandsaidDadIwantto3peoplefeellikethat.Myfatheraskedme4Imeant.IwanttobeamotivationalspeakerjustlikeMr.ZiglerIreplied.AAn5wasborn. RecentlyIbeganseekingmydreamofmotivatingothers.6afour﹣yearrelationshipwithFortune100Company7asasales﹣trainerandendingasaregionalsalesmanagerIleftthecompanyattheheightofmy8.Manypeoplewere9thatIwouldleaveafterearningasix﹣figureincome.Andtheywondered10Iwouldriskeverythingforadream. Imademy11tostartmyowncompanyandleavemysecurepositionafter12aregionalsalesmeeting.Thevice﹣presidentofourcompanydelivereda13thatchangedmylife.HeaskedusIfagodwouldofferyouthreewisheswhatwouldtheybe?Aftergivingusa14towritedownthethreewisheshethenaskedusWhydoyouneeda15?IwouldneverforgetthepowerIfeltatthatmoment.Irealizedthat16Ihadaccomplishedinthepasthadpreparedmeforthismoment.Iwasreadyanddidn'tneedagod'shelptobecomeamotivationalspeaker.Amotivationalspeakerwas17. HavingmadethatdecisionIwasimmediately18.OneweekafterIgavenoticemyhusbandwaslaidofffromhisjobandnowwehadno19.ButIheldfasttomydream.Thewonderreallybegantohappen.Inashorttimemyhusbandfoundabetterjob.AndIwasabletobookseveral20engagementswithnewcustomers.Idiscoveredtheunbelievablepowerofdreams. 1.A.rise B.blow C.put D.raise 2.A.left B.came C.arrived D.reached 3.A.get B.hope C.make D.cheer 4.A.that B.what C.which D.if 5.A.dream B.idea C.girl D.speaker 6.A.After B.Before C.Because D.While 7.A.beginning B.working C.acting D.regarding 8.A.life B.love C.income D.career 9.A.disappointed B.moved C.surprised D.delighted 10.A.when B.why C.if D.how 11.A.plan B.promise C.decision D.mind 12.A.attending B.joining C.entering D.holding 13.A.newspaper B.book C.report D.speech 14.A.day B.second C.week D.moment 15.A.help B.job C.god D.company 16.A.everything B.anything C.nothing D.something 17.A.alive B.dead C.missing D.born 18.A.examined B.searched C.checked D.tested 19.A.help B.harm C.income D.money 20.A.selling B.speaking C.writing D.listening
30分I'dbeenproudthatI'dneverlostmycellphoneuntilmyhusbandJackgotacalloneevening. Wewenttovisitafriendinhospitallastyear.WhenJack's41rangitwasmymothercallingfrommy42.SheaskedifIhad43mymobile.Icheckedmypurse.Itwas44！ IusedJack'sphonetocallmynumber.ThenaboywhomI'llcallRhys45it.Ifoundyourphone！hesaidexcitedly.Ihavebeentryingtofindyoubut46itwasgettinglateIdecidedtoleave.Hegavemetheaddressofa47nearhishome. LaterthateveningIwentto48himthere.Ididn'tdaretogo49worryingthiswassomecheater.SoJackcamealong.After5010kmwegottothecoffeeshopwhichRhys51. My52weregone.Rhyswasjustayoungboy.Howdidyou53mymum?Iasked.He54thatwhenhefoundmymobilebytheroadsidehestartedcallingpeopleinmylistofcontacts联系人.Butallthey55wasmymobilephonenumber﹣whichdidn't56.He'dcalledmanynamesstartingwiththeletterA.FinallyhegotAdamoneofmyfriendswho57myhouse. Iwas58togetmyphonebackwithallthecontactsmessagesandphotosIcouldhavelostforever.Iwasso59toRhysandofferedhimsomemoneybuthe60. AswedrovebackwepraisedRhysforhishonesty. 41.A.electriccar B.mobilephone C.radio D.doorbell 42.A.hospital B.Company C.school D.home 43.A.found B.Changed C.lost D.bought 44.A.gone B.New C.busy D.broken 45.A.accepted B.Returned C.got D.answered 46.A.before B.Because C.after D.if 47.A.coffeeshop B.postoffice C.hotel D.supermarket 48.A.follow B.Meet C.catch D.punish 49.A.slowly B.Back C.alone D.finally 50.A.driving B.Running C.walking D.riding 51.A.talkedabout B.lookedfor C.heardof D.knewabout 52.A.difficulties B.Fears C.diseases D.hopes 53.A.remember B.Know C.tell D.understand 54.A.realized B.Repeated C.explained D.believed 55.A.had B.Noticed C.expected D.finished 56.A.happen B.Matter C.help D.fit 57.A.called B.Visited C.shared D.sold 58.A.sorry B.Glad C.sad D.proud 59.A.useful B.Strange C.grateful D.polite 60.A.missed B.Appeared C.agreed D.refused
如图在△ABC中点D在BC边上BC=3CD分别过点BD作ADAB的平行线并交于点E且ED交AC于点FAD=3DF． 1求证△CFD∽△CAB 2求证四边形ABED为菱形 3若DF=BC=9求四边形ABED的面积．
1分Thequestionsheraisedduringthediscussionwerealltothep.
1分Makesurethatyousetupeverywordshesays..
对下列多项式进行分解因式2xa-b+3yb-a
某白色固体甲的主要成分为NaCl可能含有MgCl2KClBaCl2和NaOH中的一种或几种杂质为检验白色固体甲的成分并除去其中杂质进行如下实验 1写出生成白色固体丙的化学方程式 2向无色溶液D中加入过量稀盐酸的目的是 3分析上述实验可知白色固体甲中一定没有的物质是 4若用上述实验中的ABCD四种溶液鉴别稀H2SO4和NaOH溶液分别取样后按下图所示操作进行实验就能达到鉴别目的的是实验
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1分Talwayscomesafterlightening闪电.
对下列多项式进行分解因式x-y2+16y-x
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观察下列各式x-1÷x-1=1x2-1÷x-1=x+1x3-1÷x-1=x2+x+1x4-1÷x-1=x3+x2+x+1．1根据上面各式的规律可得xn+1-1÷x-1=2利用1的结论求22015+22014++2+1的值3若1+x+x2++x2015=0求x2016的值．
1分Thepoorwomanissocaboutherson'ssafetythatshecouldn'tsleepwellallnight.
结合下列所示实验回答有关问题．1有氨味的气体是2经检验无色溶液C中含有NaCl则可推测出X溶液为溶液．3进一步测定可知无色溶液C的pH＞7向其中加入适量的Na2SO4溶液无现象写出无色溶液C中所含溶质的所有可能情况
计算-32013·-2011=．
1分Mymotherwasptheluggageforourtripinthelivingroom.
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6分Areyouscaredaboutmovinguptoseniorhighschool?Itcanbeanewexperiencebutyoushouldn'tworry.We'veputtogetheraguideonhowtosurvivethefirstweek. You'renotalone Remembereverybodyelseinyouryearisinthesameboat.Theymaynotrealizeitbutthey'rejustasnervousasyouare.Movingtoseniorhighisanopportunitynotaproblem.Thingsaredifferentandallyouneedtodoisbepoliteandlearnthenewrules. Teachersarereadytohelp Ifyou'reunsurewhattodoorareworriedaboutanythingthenyouhadbetteraskforhelp.Teachersareprobablythebestpeopletoturntoasthey'reexperiencedinhelpingnewstudents.Someseniorhighschoolsalsohaveafriendssystem.Ifyourschoolhasthisthenyouwillbepairedwithanolderstudent.Theywilllookoutforyouandhelpyouifyouhaveanyproblemsorquestions. Allchange Therearelotsofdifferencesbetweenjuniorhighschoolandseniorhighschool.You'llhaveahomeworkdiaryorastudentplanner.Youwillhaveyourlessonswithdifferentteachersindifferentrooms.Youwillhavehomeworkfordifferentsubjectsondifferentdayssomakesureyougetorganized.Makesureyouhaveacopyofyourschooltimetablewrittendownsoyouknowwhichroomsyourclassesareinandonwhichdaysyouwillhaveyourdifferentsubjects. Otherpoints Ifyou'vegotanolderbrotherorsisterattheschoolthenaskthemforadvice. Beyourself!Itsoundssimplebutpeoplewillknowyoumuchbetterifyoujustactnaturally. Havingearlynightsmakesadifferenceandyou'llfinditeasiertogetupinthemorning! 33.Whichofthefollowingisclosestinmeaningtotheunderlinedsentence? A.Otherstudentshavesimilarfeelingstoyours. B.Otherstudentshavetolearnboatingwithyou. C.Otherstudentswillhelpyousolveyourproblems. D.Otherstudentswillteachyoupolitenessandnewrules. 34.Thenewstudentsturntoteachersfirstwhenhavingproblemsbecause. A.teacherswon'tblamethemasparentsdo B.teachersaregoodathelpingsolveproblems C.teachersareequaltoeverystudent D.parentsaretoobusytohelpthem 35.What'sthepurposeofthepassage? A.Totellstudentstheimportanceoflearning. B.Towarnstudentsnottoignorefriendshipinseniorhigh. C.Tomakeadifferencewhenmovinguptoseniorhigh. D.Tohelpnewstudentstogetusedtolifeinseniorhigh.
互联网给生活带来极大的方便据报道2016底全球支付宝用户数为4.5亿2018年底达到9亿． 1求平均每年增长率 2据此速度2020底全球支付宝用户数是否会超过17亿请说明理由．参考数据≈1.414
1分Hemustworkhardinorderthatsupporthisfamily..
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