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如图所示，在边长为L的正方形区域abcd内有垂直纸面向里的匀强磁场，有一个质量为m，带电量大小为q的离子，从ad边的中点O处以速度v垂直ad边界向右射入磁场区域，并从b点离开磁场．则（ ）
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高三下学期物理《》真题及答案
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如图所示用相同导线制成的边长为L.或2L.的四个单匝闭合回路它们以相同的速度先后垂直穿过正方形匀强磁
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轻质绝缘细线吊着一质量为m=0.64kg边长为L.=0.8m匝数n=10的正方形线圈abcd线圈总电
如图所示正方形abcd区域内有垂直于纸面向里的匀强磁场O.点是cd边的中点一个带正电的粒子重力忽略不
该带电粒子不可能刚好从正方形的某个顶点射出磁场
若该带电粒子从ab边射出磁场，它在磁场中经历的时间可能是t
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如图所示用相同导线制成的边长为L.或2L.的四个单匝闭合回路它们以相同的速度先后垂直穿过正方形匀强磁
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如图所示截面为正方形的空腔abcd中有一匀强磁场磁场方向垂直纸面向里磁感应强度为B.正方形空腔的边长
如图11所示abcd是一边长为l的匀质正方形导线框总电阻为R.今使线框以恒定速度v水平向右穿过方向垂
如图所示用相同导线制成的边长为L.或2L.的四个单匝闭合回路它们以相同的速度先后垂直穿过正方形匀强磁
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轻质细线吊着一质量为m=0.64kg边长为L.=0.8m匝数n=10的正方形线圈abcd线圈总电阻为
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轻质细线吊着一质量m=1.5kg边长L=2m匝数n=10的正方形线圈线圈的总电阻r=5Ω边长为的正方
如图所示正方形线框的边长为L.电容器的电容为C.正方形线框的一半放在垂直于纸面向里的匀强磁场中在磁场
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已知函数fx＝e|x|+mcosx+2只有一个零点则m＝．
Manyyearsagomydadwasfacingaseriousheartcondition.Hewasunabletodoasteadyjob.Hefellsuddenlyillandhadtobeadmittedtothehospital. Hewantedtodosomethingtokeephimselfbusysohedecidedtovolunteeratthelocalchildren'shospital.Mydadlovedkids.Itwastheperfectjobforhim.Heendedupworkingwiththeseriouslyillchildren.Hewouldtalkplayanddoartswiththem. Oneofhiskidswasagirlwithararediseasethatparalyzed瘫痪herfromtheneckdown.Shecouldn'tdoanythingandshewasverydepressed.Mydaddecidedtotrytohelpher.Hestartedvisitingherinherroombringingpaintsbrushesandpaper.Hestoodthepaperupputthepaintbrushinhismouthandbegantopaint.Hedidn'tusehishandsatall.AllthewhilehewouldtellherSeeyoucandoanythingyousetyourmindto.Attheendofthedayshebegantopaintusinghermouthandsheandmydadbecamefriends.Soonafterthelittlegirlwassenthomebecausethedoctorsfelttherewasnothingelsetheycoulddoforher.Mydadalsoleftthechildren'shospitalforalittlewhilebecausehebecameill.Sometimelateraftermydadhadrecoveredandreturnedtoworkincamethelittlegirlwhohadbeenparalyzedandonlythistimeshewaswalking.Sheranstraightovertomydadandhuggedhimreallytight.Shegavehimapictureshehaddoneusingherhands.AtthebottomitreadThankyouforhelpingmewalk. Mydadwouldcryeverytimehetoldusthisstoryandsowouldwe.Hewouldsaysometimesloveismorepowerfulthandoctorandmydad﹣whodiedjustafewmonthsafterthelittlegirlgavethepicture﹣lovedeverysinglechildinthathospital. 1Theauthor'sfatherworkedatthelocalhospitalto. A.makehisseriousheartconditionlessserious. B.keephimselfoccupiedandpleased. C.realizehischildhooddream. D.earnmoneytopayfortreatment. 2Howdidtheauthor'sfatherhelptheparalyzedlittlegirl? A.Hehelpedherpracticewalking. B.Hevisitedherandmadeatoyforher. C.Heshowedhershecouldstilldothings. D.Hepaintedspecialpicturesforher. 3AccordingtoParagraph3theparalyzedgirl. A.eventuallybecameauniquepainter. B.wassenthomeandneverseenagain. C.graduallyrecoveredandwalked. D.senttheauthor'sdadapicturepaintedwithhermouth. 4Whatmessagedoesthepassagemainlyconvey? A.It'sbettertogivethantoreceive. B.Asickpersonshouldnotfocusonhisdisease. C.Volunteeringisaworthwhilethingtodo. D.Lovecansometimesbringgreatresults.
已知EFGH分别是四面体ABCD的棱ABBCCDDA上的点且AE＝EBBF＝FCCH＝2HDAG＝2GD．则下列说法错误的是
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Youcanseldomseehomelesspeopleonthestreet.Sowhatcouldyoudoifyouwanttohelpthem?Herearesomeways. Donate捐赠money.Theeasiestwaytohelpthehomelessistodonateyourmoney.Whenyouwanttodothatyoucandonateyourmoneytolocalorganizations.Mostcharityorganizationsknowwherethemosthelpisneeded. Donatethings.Donatingyourusedornewthingsisanothereasywaytohelp.Donatethesethingstolocalorganizationswhichhelpthehomelessorgivethemtohomelesspeopleyouseeoften.Thebestthingstodonateincludethingslikeprofessionalclothingnewsocks… Providefood.①Therearelotsofwaysthatyoucanhelphomelesspeoplegetfood.Youcandonatefreshfruitsandvegetablestolocalsoupkitchens.Youcanalsodropoffbananasapplesorsandwiches. Callemergency紧急services.Ifyouseesomeonewhomaybeadangertothemselvesorotherscallemergencyservices.②Ifsomeoneisclearlyhavingaseriousproblemcallforhelpalso.IfsomeoneisindangerbecauseofweatherconditionscallEmergencyServicesalso. 1根据短文内容简要回答问题 1Whatistheeasiestwaytohelpthehomeless? 2Wherecanyoudonateyourusedornewthings? 2①和②将短文中画线的句子译成汉语. ① ② 3请给短文拟一个适当的标题.
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Oneofthefeaturesofasuccessfulbusinessisitsabilitytoemploycreativitytoconstantlypushintonewterritory.Withoutgrowthandinnovationbusinesseseventuallyfadeaway.Thosewithstayingpowerhoweverhavemasteredanoften﹣overlookedfactorthatallowsthemtofocusonthefutureclearlyempathy共情.WhilethatmaysurprisemanyIamcertainthattheabilitytoconnectwithandrelatetoothers﹣empathyinitspurestform﹣istheforcethatmovesbusinessesforward. Thoughtheconceptofempathymightgoagainstthemodernconceptofatraditionalworkplacecompetitivetherealityisthatforbusinessleaderstoexperiencesuccesstheyneedtonotjustseeorheartheactivityaroundthembutalsorelatetothepeopletheyserve. Somemaythinktheywanttheresultsfromdoggedly顽强地pursuingtheirgoalswithoutmuchthoughtforotherpeople.Thisattitudeworksforsomebutatsomepointoftensoonerratherthanlatereveryoneneedstorelyontheirrelationshipsandestablishedpersonalandprofessionalconnections.Theserelationshipsaretheproductoftakinganhonestanddedicatedinterestinothersandtheirbusinesses.Successfulpeopledonotoperatealoneeachofusneedsthesupportofotherstoachievepositiveresultsthatpushustowardourgoals.Trueempathycombinesunderstandingboththeemotionalandthelogicalrationale根据thatgoesintoeverydecision. Effectivelyunderstandingempathyinvolvesviewingitaseachperson'sconnectiontothepeopleandmarketplacethatsurroundthem.Abiologicalprincipleknownasco﹣evolutionexplainsthattheadaptationofanorganismiscausedbythechangeofarelatedobject.Similarlybusinessesandtheirleadersparticipateinco﹣evolution﹣typerelationships.Businesssuccessdependsonempatheticleaderswhoareabletoadaptbuildonthestrengthsaroundthemandrelatetotheirenvironment.Whenbusinessesfailitisoftenbecauseleadershavestoppedfocusingonunderstandingtheirenvironmentandinsteadstayseparatedintheirownoperations.Successfulbusinessleadersarereceptivetodisturbanceandawareofwhatisgoingonintheirorganizationsbothinternallyandexternally. Todevelopaneffectiveworkforcewemustbewillingtogiveinandmeetpeoplewheretheyare.Thiscanbefrustratinganduncomfortableparticularlywhenyoufeellikeyourpositionmakesmoresenseoroffersabettersolution.Acriticalpartofdevelopingempathyhoweverislearningtounderstandrespectandimplementanotherindividual'spointofviewratherthanforcingyourown. 1Intheauthor'sopinionifacompanywantstoachievesuccessitmust. A.frequentlydevelopinnewareas. B.alwaysstaypureandpowerful. C.concentrateonitsfuturedevelopment. D.valuemuchthoughtforothers. 2Itcanbeinferredfromthepassagethat. A.empathygenerallydependsonlogicalreasons. B.supportsfromothershelptoachieveambitions. C.competitionrarelyexistsintraditionalworkplaces. D.strivingforgoalsonone'sownisthekeytosuccess. 3Whichofthefollowingexamplescanbestillustratetheco﹣evolutionprinciple? A.Thebossistoooccupiedtorealizethathisemployees'incomeisbelowtheaverage. B.Theheadofthenewsagencyofferslittlebonustothejournalistswhoworkextrahours. C.Theprincipalpromisesflexibleworkinghoursaftertheschoolmovestothecountryside. D.Thefactorydirectorinsistsonincreasingtheoutputdespitethedecliningmarketdemand. 4Whatcanbethebesttitleofthispassage? A.EmpathyandBusinessSuccess. B.TheFormationofEmpathy. C.EmpathyandAggressiveness. D.TheImportanceofEmpathy.
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PeteRosethefamousbaseballplayerwhomIhavenevermettaughtmesomethingsovaluablethatitchangedmylife.PetewasbeinginterviewedinspringtrainingtheyearhewasabouttobreakTyCobb'sall﹣timehitsrecord.OnereporteraskedPeteyouonlyneed78hitstobreaktherecord.Howmanyat﹣ bats轮到击球doyouthinkyou'llneedtogetthe78hits?WithouthesitationPetesaid78.ThereporteryelledbackAhcomeonPete.Youdon'texpecttoget78hitsin78at﹣batsdoyou? Mr.Rosecalmlysharedhisruleinlifewithallthereporterswhowereanxiouslyawaitinghisreply.EverytimeIstepuptotheplateIexpecttogetahit！IfIdon'texpecttogetahitIhavenorighttostepinthebatter'sboxinthefirstplace！IfIgouphopingtogetahitthenIprobablydon'thaveaprayerofgettingahit.Itisthepositiveexpectationthathasgottenmeallofthehitsinthefirstplace. WhenIthoughtaboutPeteRose'sruleandhowitwasappliedtoeverydaylifeIfeltalittleembarrassed.AsabusinesspersonIwashopingtomakemysalesmeetthequotas定额.AsafatherIwashopingtobeagooddad.AsamarriedmanIwashopingtobeagoodhusband.ThetruthwasthatIwasanadequatesalespersonIwasnotsobadasafatherandIwasanokayhusband.Iimmediatelydecidedthatbeingokaywasnotenough!Iwantedtobeagreatsalespersonagreatfatherandagreathusband.Ichangedmyattitudetooneofpositiveexpectationsandtheresultswereamazing.IwasfortunateenoughtowinafewsalestripsIwonCoachoftheYearinmyson'sbaseballleagueandIsharedalovingrelationshipwithmywife！ThanksMr.Rose! 1WhichofthefollowingsayingscanmostappropriatelybeusedtodescribeMr.Rose'srule? A.Hewhodoesn'twanttobeageneralcan'tbeagoodsoldier. B.Beforeeverythingelsegettingreadyisthesecretofsuccess. C.Ifyouworkhardenoughyourdreamswillcometrue. D.Romewasnotbuiltinoneday. 2WhatcanbeinferredaboutPeteRosefromthepassage? A.Hewasgeneroustoshareallhisruleswitheveryone. B.Hegotallthehitshewantedbecauseofgoodluck. C.Hesethimselfagoalofbeingthebest. D.Helikedtodreamofsomethingimpossible. 3BysayingIwasanadequatesalespersoninPara.3thewriterprobablymeans. A.hecouldmakeadequatemoneyasasalesperson B.hedidn'tdoanexcellentjobasasalesperson C.hewasgoodenoughtobeasalesperson D.heknewhowtosellgoodsinaproperway
已知函数fx＝x﹣1ex﹣alnx在上单调递减则a的取值范围是
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在△ABC中角ABC的对边分别为abca﹣b+ca+b﹣c＝bc． 1求A 2若A+B＝Cb＝1求△ABC的周长．
EverybodyseemstopaymoreattentiontomylittlesisterLisa.I've1enoughofthisbig﹣sisterthing! SoIdecideto2withmyfavoritetoysandother3likeclothes.Mother4myrunningaway.Howevershe'snotasupsetasshe5beAreyougoingtoGrandma's?Ican'tbelieveshecaneven6thisout.She'slikeawitch! Idon't7herandgoout.So8onmyleavingI'munawaremotheris9me.FinallyIgettoGrandma's.10Ievenknockthedooropens.IrealizeMotherhas11ahead. Mothercomesinandsitsdownpattingherthigh大腿Comehere.Idon'twanttobutI'mhotandtiredsoI12herthigh.Shepushesmyhairbehindmyearandasks13Dearwhyhaveyouleft?AnditallcomesoutIt's14andallthetimewithLisaIgetintotrouble… Takingmyfaceinherhands.MumsaysIdon'twantyoutobeso15.Ifit'shardforyou.I'llcalltheorphanageandsendherawaytomorrow.Istartto16andIbegherNo.Don'tsendheraway!Seeming17Motheragrees. 18wheneverwehavean19ifIsayMumLisa'sbeingmeantome! MumsmilesYouhadyour20. 1A.seen B.had C.done D.thought 2A.argue B.move C.talk D.leave 3A.necessities B.facilities C.valuables D.tools 4A.monitors B.enjoys C.ignores D.notices 5A.could B.must C.should D.would 6A.put B.take C.bring D.figure 7A.forgive B.answer C.watch D.accept 8A.keen B.dependent C.focused D.impressed 9A.seeking B.following C.missing D.scolding 10A.Before B.When C.Until D.After 11A.called B.arrived C.known D.asked 12A.pushaway B.falloff C.geton D.holdonto 13A.quickly B.impatiently C.unhappily D.gently 14A.unimportant B.improper C.unfair D.impolite 15A.ridiculous B.sad C.unconfident D.nervous 16A.cry B.laugh C.nod D.jump 17A.puzzled B.unsatisfied C.exhausted D.unwilling 18A.Afterwards B.Instead C.Frankly D.Generally 19A.discussion B.plan C.quarrel D.choice 20A.life B.chance C.experience D.fortune
WantedSomeoneforaKiss We'relookingforproducerstojoinusinthesecondofLondon100FM.You'llworkonthestation'smusicprogrammes.Musicproductionexperienceinradioisnecessaryalongwithrichknowledgeofmoderndancemusic.Pleaseapply申请inwritingtoProducerVacanciesKiss100. FatherChristmas We'relookingforaveryspecialpersonpreferablyover40tofillourFatherChristmassuit. WorkingdaysEverySaturdayfromNovember24toDecember15andeverydayfromDecember17toDecember24exceptSunday1030﹣1600 Excellentpay. Pleasecontact联系theEnterpriseShoppingCenterStationParadeEastbourne. AccountantsAssistant WhenyoujointhetheminourRevenueAdministrationUnityouwillbeprovidingassistancewithinallpartsoftheRevenueDivisiondealingwithpostandothergeneralduties.IfyouareeducatedtoGCSEgradeClevelwewouldliketotalktoyou.Thispositionisequallysuitableforaschoolleaverofforsomebodywhohasofficeexperience. WealdenDistrictCouncil SoftwareTrainer Ifyouareaged24﹣45andhaveexperienceinteachingandtrainingyoucouldbethepersonwearelookingfor.Youshouldbegoodatthecomputerandhavesomeexperienceinprogrammewriting.Youwillbeallowedtomakeourdecisionandtodesigncoursesaswellaspresentthem.Payupwardsof￡15000fortherightperson.PleaseapplybysendingyourCV简历toMrsR.OgliviePalmlaceLimited. 1Whoshouldyougetintouchwithifyouhopetoworkinaradiostation? A.ProducerVacanciesKiss100. B.MrsR.OgliviePalmlaceLimited. C.TheEnterpriseShoppingCentre D.WealdenDistrictCouncil. 2WelearnfromtheadsthattheEnterpriseShoppingCentreneedsapersonwho. A.isagedbetween24and40 B.maydosometrainingwork C.shoulddealwithgeneralduties D.canworkforaboutamonth 3Whichpositionisopentorecentschoolgraduates? A.ProducerLondonKiss. B.FatherChristmas. C.AccountantsAssistant D.SoftwareTrainer 4WhatkindofpersonwouldprobablyapplytoPalmaceLimited? A.OnewithGCSEgradeClevel. B.Onewithsomeofficeexperience. C.Onehavinggoodcomputerknowledge D.Onetrainedinproducingmusicprogrammes.
假定你是李华来自高一4班.请你代表班级写封邮件给下周四即将回国的外教Johnson先生邀请他参加7月20日晚上7点为其出色的教学而举办的欢送晚会. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.邮件的开头和结尾己给出不计入总词数. DearMr.Johnson Yours LiHua
为了研究广大市民对共享单车的使用情况某公司在我市随机抽取了100名用户进行调查得到如下数据 认为每周使用超过3次的用户为“喜欢骑共享单车”． 1分别估算男女“喜欢骑共享单车”的概率 2请完成下面的2×2列联表并判断能否有95%把握认为是否“喜欢骑共享单车”与性别有关． 附表及公式其中n＝a+b+c+d．
已知函数fx＝2xlnx﹣mx． 1若m＝0求曲线y＝fx在x＝1处的切线方程 2若函数fx在[1e]上的最小值为﹣e求m的值．
某学校有2200名学生现采用系统抽样方法抽取44人将2200人按12…2200随机编号则抽取的44人中编号落在[101500]的人数为
ChoosingtheRightPathtoBeaBetterPerson Lifeisaconstantexerciseinself﹣improvement.Intherushtoachievetheideaofbeingbettercanbecomelostsometimes.Youmayalwayswonderhowtoimproveyourselfandfulfillyourdreamsinaneasierway.1 Exploreyourtalents. Everybodyhassomeoutstandingskillsorinterests.Soit'softennecessarytobepatientandtrymanythingsbeforeyoufindonethatsuitsyou. 2Forexamplepeoplelovingadventuremaynotbeinterestedinthequietchessclubbutsomeonewhoenjoysotherquietactivitiesmightbe.Determiningwhoyouenjoybeingaroundmayhelpyouknowwhatyou'llenjoy. 3 Nomatterhowmuchmoneyyoumakeyouwillnotbehappyifyouspendyourentirelifedoingsomethingyouhate.It'simportanttoatleastdevotesomeofyourtimetowhatmakesyouhappy. Ifyou'reparticularlyunhappyatyourjobconsiderwhy.4Ifyoufeelyourjobisn'tmeaningfulorisn'tinlinewithyourvaluesconsiderfindinganotherjob. Experiencesomethingnew. Researchhasshownthatwhenwe'reinourcomfortzonewearen'tasproductiveaswearewhenwestepjustbeyondit.5Becauseofthatwemayreactslowlytoourownpositiveexperiences.It'simportanttohavenewexperiencesandinteractionswithothersevenwhenthosearealittlescary.Doingsocanhelpyouachievemore. A.Dowhatyoulove. B.Herearesometipsforyou. C.Registerinaclassyou'reinterestedin. D.Humansadaptveryquicklytopositiveevents. E.It'spossiblethatsomechangesmaychangeyourfeeling. F.Similartypesofpeoplemaybeattractedtothesameactivities. G.Trynottoallowyourselftofocussomuchonacertainaspectofyourlife.
Celebrities名人likeOliviaMunnaswellasfashioncompanieslikeCucciandVersaceareamongthosewhohavebeenopposed1wearinganimalfur.NowSanFranciscohasbecomethe2largecityintheUSAtobanretailersfromsellingnewfurtotheircustomers. Thebanaimstosend3strongmessagetothefurindustry4thecrueltytheseanimalsendureforthepurposeof5becomeclothingisnotconsistentwiththevalueofthecity. AsweallknowWestHollywoodbecamethefirstAmericancity6forbidthesaleofnewfuritemsin2011andBerkeleypassedabanonthesaleoffurclothingin2017.Additionallyin2000theUKledthecharge打头阵7followbyAustraliain2004.MorerecentlytheNetherlandstheEuropeanUnion'smaproduceroffurbannedfurfarmingin2012andplanstoendmink貂farmingby2024.In2018Norwaybannedfurfarmsand8endfoxandminkfarmingby2025. Hopefullyonlywheneffortslikethesearemadetoencourage9consumetostopbuyingrealanimalfur10thelivesofanimalsbefurtherprotectedallovertheworld.
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若该带电粒子从cd边射出磁场，它在磁场中经历的时间一定是
a点的电势高于b点的电势 电容器所带的电荷量为零 
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