首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
如图所示,质量为m的滑块静置于倾角为30°的固定粗糙斜面上,轻弹簧一端固定在竖直墙上的P点,另一端系在滑块上,弹簧与竖直方向的夹角为30°.重力加速度大小为g.下列说法正确的是( )
查看本题答案
包含此试题的试卷
高三下学期物理《》真题及答案
点击查看
你可能感兴趣的试题
质量为m的木块置于倾角为θ的固定斜面上它与斜面间的动摩擦因数为μ一水平力F.作用在m上.在力F.的推
如图所示倾角为30°的粗糙绝缘斜面固定在水平地面上整个装置处在垂直斜面向上的匀强电场之中一质量为m电
如图所示两光滑斜面的倾角分别为30°和45°质量分别为2m和m的两个滑块用不可伸长的轻绳通过滑轮连接
质量为2m的滑块受到重力、绳的张力、沿斜面的下滑力和斜面的支持力的作用
质量为m的滑块均沿斜面向上运动
绳对质量为m滑块的拉力均大于该滑块对绳的拉力
系统在运动中机械能均守恒
如图所示质量M.=10kg的木楔ABC静置于粗糙水平地面上动摩擦因数μ=0.02在木楔的倾角为30°
2016·广东六校联考如图一质量为m的滑块静止置于倾角为30°的粗糙斜面上一根轻弹簧一端固定在竖直墙
滑块不可能只受到三个力作用
弹簧可能处于伸长状态
斜面对滑块的支持力大小可能为零
斜面对滑块的摩擦力大小一定等于
mg
如图所示两光滑斜面的倾角分别为30°和45°质量分别为2m和m的两个滑块用不可伸长的轻绳通过滑轮连接
质量为2 m的滑块受到重力、绳的张力、沿斜面的下滑力和斜面的支持力的作用
质量为m的滑块均沿斜面向上运动
绳对质量为m滑块的拉力均大于该滑块对绳的拉力
系统在运动中机械能均守恒
如图所示两上下底面平行的滑块重叠在一起置于固定的倾角为θ的斜面上滑块
B.的质量分别为M.、m,A.与斜面间的动摩擦因数为μ1,
与A.之间的动摩擦因数为μ2.已知两滑块都从静止开始以相同的加速度从斜面滑下,滑块上B.受到的摩擦力( ).【3】
(A.)等于零 (B.)方向沿斜面向上(
)大小等于μ1mgcosθ (
)大小等于μ2mgcosθ
如图6所示质量为M.的斜面体
置于粗糙水平面上,用轻绳拴住质量为m的小球
置于斜面上,整个系统处于静止状态.已知斜面倾角θ=30°,轻绳与斜面平行且另一端固定在竖直墙面上,不计小球与斜面间的摩擦,则 ( )
图6 A.斜面体对小球的作用力大小为mg B.轻绳对小球的作用力大小为mg
斜面体对水平面的压力大小为(M.+m)g
斜面体与水平面间的摩擦力大小为mg
如图所示质量M=10kg的木楔ABC静置于粗糙水平地面上滑动摩擦系数μ=0.02.在木楔的倾角θ为3
如图所示一个质量为m的滑块静止置于倾角为30°的粗糙斜面上一根轻弹簧一端固定在竖直墙上的P点另一端系
滑块可能受到三个力作用
弹簧一定处于压缩状态
斜面对滑块的支持力大小可能为零
斜面对滑块的摩擦力大小一定等于
mg
如图所示一个质量为m的滑块静止置于倾角为30°的粗糙斜面上一根轻弹簧一端固定在竖直墙上的P.点另一端
滑块可能受到三个力作用
弹簧一定处于压缩状态
斜面对滑块的支持力大小可能为零
斜面对滑块的摩擦力大小一定等于
如图所示一个质量为m的滑块静止置于倾角为30°的粗糙斜面上一根轻弹簧一端固定在竖直墙上的P.点另一端
滑块可能受到三个力作用
弹簧一定处于压缩状态
斜面对滑块的支持力大小可能为零
斜面对滑块的摩擦力大小一定等于
如图所示一个质量为m的滑块静止置于倾角为30°的粗糙斜面上一根轻弹簧一端固定在竖直墙上的P点另一端系
弹簧一定处于压缩状态
斜面对滑块一定有支持力
滑块一定受到四个力作用
斜面对滑块的摩擦力大小可能等于零
如图所示两光滑斜面的倾角分别为30°和45°质量分别为2m和m的两个滑块用不可伸长的轻绳通过滑轮连接
质量为2m的滑块受到重力、绳的张力、沿斜面的下滑力和斜面的支持力的作用
质量为m的滑块均沿斜面向上运动
系统在运动中机械能均守恒
绳对质量为m滑块的拉力均大于该滑块对绳的拉力
如图所示质量为m1=5kg的滑块置于一粗糙的斜面上用一平行于斜面的大小为30N.的力F.推滑块滑块沿
如图所示倾角为30°的粗糙绝缘斜面固定在水平地面上整个装置处在垂直斜面向上的匀强电场之中一质量为m电
两上叠在一起的滑块置于固定的倾角为θ斜面上如图所示滑块
B.质量分别为M.、m,A.与斜面间的动摩擦因数为μ
1
,
与A.之间的动摩擦因数为μ
2
,已知两滑块都从静止开始以相同的加速度从斜面滑下,滑块B.受到的摩擦力 A.等于零 B.方向沿斜面向下
大小等于μ
1
mgcosθ
大小等于μ
2
mgcosθ
如图2所示一个质量为m的滑块静止置于倾角为30°的粗糙斜面上一根轻弹簧一端固定在竖直墙上的P.点另一
弹簧一定处于压缩状态
滑块可能受到三个力作用
斜面对滑块的支持力不能为零
斜面对滑块的摩擦力大小等于mg
如图所示截面为直角三角形的木块置于粗糙的水平地面上其倾角30o.现有一质量m=l.0kg的滑块从斜面
如图所示一个质量为m的滑块静止置于倾角为30°的粗糙斜面上一根轻弹簧一端固定在竖直墙上的P.点另一端
滑块可能受到三个力作用
弹簧一定处于压缩状态
斜面对滑块的支持力大小可能为零
斜面对滑块的摩擦力大小一定等于
热门试题
更多
重庆地区水资源总量较丰富下列有关水的说法错误的是
DirectionsCompletethefollowingpassagebyusingthewordsinthebox.Eachwordcanonlybeusedonce.Notethatthereisonewordmorethanyouneed. Consideringhowmuchtimepeoplespendinofficesitisimportantthatworkbewelldesigned.Well﹣designedofficespaceshelpcreateacooperation'simage.Theymotivateworkersandtheymakeanimpressiononpeoplewhovisitandmightbepotentialor41customer.Theymakebusinessesworkbetterandtheyareapartofthecorporateculturewelivein. Aswemoveawayfromanindustrial﹣basedeconomytoaknowledge﹣basedoneofficedesignershavecomeupwith42tothetraditionalworkenvironmentsofthepast.Thedesignindustryhasmovedawayfromafixedofficesetupandcreatedmoreflexiblestrategicmanagementenvironments.These43solutionsaretomeanttosupportbetterorganizationalperformances. Asemployeehierarchies等级制度haveflattenedordecreasedofficedesigners‘responsetothischangehasbeentomoveopen﹣plainareastomoredesirablelocationswithintheofficeandcreatefewerformalprivateoffices.Theneedforincreasedflexibilityhasalsobeen44bychangesinworkstationdesign.Officesandworkspacesoftenarenot45toagivenpersononapermanentbasisbecauseofchangestomethodofworkingnewdesignsallowforexpansionormovementofdesksstorageandequipmentwithintheworkstation.Anotherimportantdesigngoaliscommunicationwhichdesignershaveimprovedbyloweringthewallsthat46workstations.Designershavealsocreatedinformalgatheringplacesandupgradedemployees'47toheavilytraffickedareassuchascopyandcoffeerooms. Corporateandinstitutionalofficedesignersoftenstruggletoresolveanumberofcompetingandoften48demandsincludingbudgetarylimitsemployeehierarchiesandtechnologicalinnovationespeciallyinrelationtocomputerization.Thesedemandsmustalsobebalancedwiththeneedtocreateinteriors内饰thatinsomewayenhanceestablishorpromoteacompany‘simageandwillenableemployeesto49attheirbest.Allthese50ofofficedesignarerelated.Themostsuccessfulofficedesignsarelikeagoodmarriage﹣﹣thewell﹣designedofficeandtheemployeesthatoccupyitareseeminglymadeforeachother. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50.
Giftfromastranger Mylocalsupermarketisalwaysbusy.ThefirstparkingspaceIfoundwasconvenientbutI'dnoticedawomaninabluecarcirclingforawhile.25IwasinagoodmoodIletherhaveit.OntheedgeofthecarparkIbackedintothenextavailablespot﹣itwasatightfit. PrettysoonI'dmademywaythroughthesupermarketandwasbackinthefreshair.FeelinggoodI26emptymypursechangeintothehandsofahomelessmanandhelpedastrugglingwomanreversepark. JustasIapproachedmycar1sawthewomanI'dlethavemycarspaceearlier.Shewasgivingme27oddlook﹣halfpuzzledhalfintent热切的.Ismiledandwishedherapleasantday.AsIsqueezedbackintomycarIspottedthesamelady28lookinatme.Helloshesaidhesitantly.This29soundcrazybutIwasonmywaytodropsomeofmymother'sthingsoffatthecharitybins.Youarejustsomuch30her.YouhelpedthosepeopleInoticedandyouseemedsohappy.Shelookedatmemeaningfullyandpassedaboxinthroughthewindow.Ithinkshewouldlikeyoutohaveit.31shockItookitfromherautomatically.Shesmiledandwalkedaway. AfterapauseIopenedthebox.Insidewasabeautifulgoldnecklacewithalargegreypearl.Itwas32nicegiftI'deverreceivedanditwasfromacompletestranger.Thenecklacewasaroundmyneckawarmreminderofhumankindness. 25. 26. 27. 28. 29. 30. 31. 32.
56.AccordingtotheCodevisitorsshouldact. A.withcareandrespect B.withreliefandpleasure C.withcautionandcalmness D.withattentionandobservation 57.WhatareyouencouragedtodowhentravellinginNewZealand? A.Takeyourowncampingfacilities. B.Buryglassfarawayfromrivers. C.Followthetrackforthesakeofplants. D.Observesignstoapproachnestingbirds.
OneoftheexecutivesgatheredattheAspenInstituteforaday﹣longleadershipworkshopusingtheworksofShakespearewasdiscussingtheroleofBrutusinthedeathofJuliusCaesar.Brutuswasnotanhonorablemanhesaid.Hewasatraitor叛徒.Andhemurderedsomeoneincoldblood.TheagreementwasthatBrutushadactedwithcrueltywhenotheroptionswereavailabletohim.Hemadeabaddecisiontheysaid﹣atleastasitwaspresentedbyShakespeare﹣totaketheleadinmurderingJuliusCaesar.AndthoughoneoftheexecutivesacknowledgedthatBrutushadthegoodoftherepublicinmindCaesarwasneverthelesshissuperior.Youhavetoendeavortheexecutivessaidourpolicyistoobeythechainofcommand. DuringthelastfewyearsbusinessexecutivesandbookwriterslookingforanewwaytoadvisecorporateAmericahavebeenexploitingShakespeare'swisdomforprofitableends.NonemoresothanhusbandandwifeteamKennethandCarolAdelmanwell﹣knownadviserstotheWhiteHousewhostartedupatrainingcompanycalledMoversandShakespeares.TheyareamateurShakespearescholarsandShakespeareloversandtheyhavecombinedtheirpassionandtheirhighlevelcontactsintoamanagementtrainingbusiness.Theyconductbetween30and40workshopsannuallyfocusingonhalfadozendifferentplaysmostlyforcorporationsbutalsoforgovernmentagencies. Theworkshopsalltakethesameformfocusingonasingleplayasakindofcasestudyandusingindividualscenesasspecificlessons.InJuliusCaesarslyprovocation狡诈的挑唆ofBrutustotakeuparmsagainstthewhatwasabasisforadiscussionofmethodsofteambuildingandgrassrootsorganism. AlthoughneitheroftheAdelmansisacademicallytrainedinliteraturetheprogrammescontainplentyofShakespearetraditionandbackground.TheirworkshoponHenryVforexampleincludesahelpfulexplanationofHenry'swinningstrategyattheBattleofAgincourt.Buttheydocometothetextwithafewbiases偏向theirreadingofHenryVminimizeshismisuseofpower.Insteadtheyemphasizethestoryoftheyouthwhoseizesopportunityandbecomesamasterfulleader.AndattheworkshoponCaesarMr.AdelmanshadlittlegoodtosayaboutBrutussayingthenoblestRomanofthemallcouldn'tmakehismindupaboutthings. ManyoftheparticipantspointedtoveryspecificelementsintheplaythattheyfeltrelatedCaesar'spridewhichledtohismurderandBrutus'smistakesinleadingtheafterthemurdertheysaidraisevitalquestionsforanyoneservingasabusinesswhenandhowdoyouresisttheboss? 73.Accordingtoparagraph1whatdidalltheexecutivesthinkofBrutus?. A.Cruel. B.Superior. C.Honourable. D.Rude 74.AccordingtothepassagetheAdelmanssetupMoversandShakespearesto. A.helpexecutivestounderstandShakespeare'splaysbetter B.giveadviceonleadershipbyanalyzingShakespeare'splays C.providecasestudiesofShakespeare'splaysinliteratureworkshops D.guidegovernmentagenciestofollowthecharactersinShakespeare'splays. 75.WhydotheAdelmansconductaworkshoponHenryV? A.Tohighlighttheimportanceofcatchingopportunities. B.Toencouragemasterfulleaderstoplanstrategiestowin. C.Toillustratetheharmofprejudicesinmanagement. D.Towarnexecutivesagainstpowermisuse. 76.Itcanbeinferredfromthepassagethat. A.theAdelmans'programmeprovesbiasedastherolesofcharactersaremaximized. B.executivesfeelboredwithtoomanyspecificelementsofShakespeare'splays. C.theAdelmanswillmakemoreprofitsiftheyareprofessionalscholars. D.Shakespearehasplayedanimportantroleinthemanagementfield. 77.Thebesttitleforthepassageis. A.Shakespeare'splaysExecutivesreconsidercorporateculture B.Shakespeare'splaysAnessentialkeytobusinesssuccess C.Shakespeare'splaysalessonforbusinessmotivation D.Shakespeare'splaysDramatictrainingbringsdramaticresults.
﹣GoandsaysorrytoyourMomDave. ﹣I'dliketobutI'mafraidshewon'tbehappywithmy. A.requests B.excuses C.apologies D.regrets
LiBaiagreatChinesepoetwasbornisknowntothepublicbutsomewon'tacceptit. A.That B.Why C.Where D.How
近日中国在四川某地发现了一个超大规模的锂矿储量高达52万吨被称之为“中国锂谷”.锂矿是重要的国家战略资源有着21世纪改变世界格局的“白色石油”和“绿色能源金属”之称.如图是锂原子结构示意图和锂元素在元素周期表中的相关信息.下列说法不正确的是
Thenumberofsmokersisreportedhasdroppedby17percentinjustoneyear. A.it B.which C.what D.as
下列叙述完全符合质量守恒定律的是
下列物质由分子构成的是
下列古代生产工艺或文明中主要利用化学变化的是
Supposeyoubecomealeaderinanorganization.It'sverylikelythatyou'llwanttohavevolunteerstohelpwiththeorganization'sactivities.Todosoitshouldhelptounderstandwhypeopleundertakevolunteerworkandwhatkeepstheirinterestinthework. Let'sbeginwiththequestionofwhypeoplevolunteer.Researchershaveidentifiedseveralfactorsthatmotivatepeopletogetinvolved.Forexamplepeoplevolunteertoexpresspersonalvaluesrelatedtounselfishnesstoexpandtheirrangeofexperiencesandtostrengthensocialrelationships.Ifvolunteerpositionsdonotmeettheseneedspeoplemaynotwishtoparticipate.Toselectvolunteersyoumayneedtounderstandthemotivationsofthepeopleyouwishtoattract. Peoplealsovolunteerbecausetheyarerequiredtodoso.Toincreaselevelsofcommunityservicesomeschoolshavelaunchedcompulsoryvolunteerprograms.Unfortunatelytheseprogramscanshiftpeople'swishofparticipationfromaninternalfactore.g.Ivolunteerbecauseit'simportanttometoanexternalfactore.g.IvolunteerbecauseI'mrequiredtodoso.Whenthathappenspeoplebecomelesslikelytovolunteerinthefuture.Peoplemustbesensitivetothispossibilitywhentheymakevolunteeractivitiesamust. Oncepeoplebegintovolunteerwhatleadsthemtoremainintheirpositionsovertime?Toanswerthisquestionresearchershaveconductedfollow﹣upstudiesinwhichtheytrackvolunteersovertime.Forinstanceonestudyfollowed238volunteersinFloridaoverayear.Oneofthemostimportantfactorsthatinfluencedtheirsatisfactionasvolunteerswastheamountofsufferingtheyexperiencedintheirvolunteerpositions.Althoughthisresultmaynotsurpriseyouitleadstoimportantpracticaladvice.Theresearchersnotethatattentionshouldbegiventotrainingmethodsthatwouldpreparevolunteersfortroublesomesituationsorprovidethemwithstrategiesforcopingwiththeproblemtheydoexperience. Anotherstudyof302volunteersathospitalsinChicagofocusedonindividualdifferencesinthedegreetowhichpeopleviewvolunteerasanimportantsocialrole.Itwasassumedthatthosepeopleforwhomtheroleofvolunteerwasmostpartoftheirpersonalidentitywouldalsobemostlikelytocontinuevolunteerwork.ParticipantsindicatedthedegreetowhichthesocialrolematteredbyrespondingtostatementssuchasVolunteeringinHospitalisanimportantpartofwhoIam.Consistentwiththeresearchers'expectationstheyfoundapositivecorrelation正相关betweenthestrengthofroleidentityandthelengthoftimepeoplecontinuedtovolunteer.TheseresultsonceagainleadtoconcreteadviceOnceanindividualbeginsvolunteeringcontinuedeffortsmightfocusondevelopingavolunteerroleidentity…ItemslikeT﹣shirtsthatallowvolunteerstoberecognizedpubliclyfortheircontributionscanhelpstrengthenroleidentity. 61.Peoplevolunteermainlyoutof. A.academicrequirements B.socialexpectations C.financialrewards D.internalneeds 62.WhatcanwelearnfromtheFloridastudy? A.Follow﹣upstudiesshouldlastforoneyear. B.Volunteersshouldgetmentallyprepared. C.Strategytrainingisamustinresearch. D.Volunteersareprovidedwithconcreteadvice. 63.Whatismostlikelytomotivatevolunteerstocontinuetheirwork? A.Individualdifferencesinroleidentity. B.PubliclyidentifiablevolunteerT﹣shirts. C.Roleidentityasavolunteer. D.Practicaladvicefromresearchers. 64.Whatisthebesttitleofthepassage? A.HowtoGetPeopletoVolunteer B.HowtoStudyVolunteerBehaviors C.HowtoKeepVolunteers'Interest D.HowtoOrganizeVolunteerActivities.
在平面直角坐标系xOy中直线C1曲线C2φ为参数以坐标原点O为极点以x轴正半轴为极轴建立极坐标系. 1求C1C2的极坐标方程 2若曲线C3的极坐标方程为θ=α且曲线C3分别交C1C2于点AB两点求的最大值.
Looktomanyofhistory'sculturalsymbolsandthereyou'llfindanancestorofFrostythesnowmaninthemovieFrozen.Itappearedonsomeofthefirstpostcardsstarredinsomeoftheearliestsilentmoviesandwasthesubjectofacoupleoftheearliestphotosdatingallthewaybacktothe1800s.Idiscoveredevenmoreaboutoneofhumanity'searliestformsoflifeartduringseveralyearsofresearcharoundtheworld. ForexamplesnowmenwereaphenomenonintheMiddleAgesbuiltwithgreatskillandthought.Atatimeoflimitedmeansofexpressionsnowwaslikefreeartsuppliesdroppedfromthesky.Itwasapopularactivityforcouplestoleisurelywalkthroughtowntoviewthetemporaryworksofchillyart.Somewerecreatedbyfamousartistsincludinga19﹣year﹣oldMichelangelowhoin1494wasappointedbytherulerofFlorenceItalytobuildasnowmaninhismansion'scourtyard. TheMiracleof1511tookplaceduringsixfreezingworkscalledtheWinterofDeath.ThecityofBrusselswascoveredinsnowmen﹣animpressivescenethattoldstoriesoneverystreetcorner.Somewerepoliticalinnaturecriticizingthechurchandgovernment.Somewereareflectionofpeople'simagination.ForthepeopleofBrusselsthiswasadefiningmomentofdefiningfreedom.Atleastuntilspringarrivedbywhichtimetheyweredealingwithdamagingfloods. Ifyoufeartheheydayofthesnowmanhaspasseddon'tworryI'velearnedthatsomeexplosivesnowmanhistoryisstillbeingmadetoday.Everyyearsince1818thepeopleofZurichSwitzerlandcelebratethebeginningofspringbyblowingupasnowman.OnthethirdMondayofApriltheholidaySechselauteniskickedoffwhenacottonsnowmancalledtheBooggisstuffedwithexplosiveandparadedthroughtownbybakersandothertradesmenwhothrowbreadtothecrowds.TheparadeendswiththeBooggbeingplacedona40﹣footpileoffirewood.AfterthebellsoftheChurchofSt.Peterhaverungsixtimesrepresentingthepassingofwinterthepileislit.Whenthesnowmanexplodeswinterisconsideredofficiallyover﹣thequickeritisburntdownthelongersummerissaidtobe. 66.AccordingtothepassagewhydidsnowmenbecomeaphenomenonintheMiddleAges? . A.Peoplethoughtofsnowasholyartsupplies. B.Peoplelongedtoseemasterpiecesofsnow. C.Buildingsnowmenwasawayforpeopletoexpressthemselves. D.Buildingsnowmenhelpedpeopledeveloptheirskillandthought. 67.Theheydayofthesnowmanparagraph4meansthetimewhen. A.snowmenweremademainlybyartists B.snowmenenjoyedgreatpopularity C.snowmenwerepoliticallycriticized D.snowmencauseddamagingfloods 68.InZurichtheblowingupoftheBooggsymbolizes. A.thestartoftheparade B.thecomingofalongersummer C.thepassingofthewinter D.thesuccessoftradesmen 69.Whatcanbeconcludedaboutsnowmenfromthepassage? A.Theywereappreciatedinhistory B.Theyhavelosttheirvalue C.Theywererelatedtomovies D.Theyvaryinshapeandsize.
如图是用红磷燃烧法测定空气里氧气含量的装置图有关此实验的结论与分析正确的是
﹣Whydidn'tyouinviteJohntoyourbirthdayparty? ﹣Wellyouknowhe's. A.anearlybird B.awetblanket C.aluckydog D.atoughnut
下列物质中属于纯净物的是
﹣JimcanyouworkthisSunday? ﹣?I'vebeenworkingfortwoweeksonend. A.Whyme B.Whynot C.Whatif D.Sowhat
Peopleselectnewsinexpectationofareward.Thisrewardmaybeeitheroftwokinds.OneisrelatedtowhatFreudcallsthePleasurePrincipletheothertowhathecallstheRealityPrinciple.Forwantofbetternamesweshallcallthesetwoclassesimmediaterewardanddelayedreward.Ingeneralthekindofnewswhichmaybeexpectedtogiveimmediaterewardarenewsofcrimeandcorruptionaccidentsanddisasterssportssocialeventsandhumaninterest.Delayedrewardmaybeexpectedfromnewsofpublicaffairseconomicmatterssocialproblemsscienceeducationandhealth. Newsofthefirstkindpaysitsrewardsatonce.Areadercanenjoyanindirectexperiencewithoutanyofthedangersorstressesinvolved.Hecantremblewildlyatanaxe﹣murdershakehisheadsympatheticallyandsafelyatahurricaneidentifyhimselfwiththewinningteamlaughunderstandinglyatawarmlittlestoryofchildrenordogs.Newsofthesecondkindhoweverpaysitsrewardslater.Itsometimesrequiresthereadertotolerateunpleasantnessorannoyance﹣asforexamplewhenhereadsofthethreateningforeignsituationthemountingnationaldebtrisingtaxesfallingmarketscarcehousingandcancer.Ithasakindofthreatvalue.Itisreadsothatthereadermaybeinformedandprepared.Whenareaderselectsdelayedrewardnewshepullshimselfintotheworldofsurroundingrealitytowhichhecanadapthimselfonlybyhardwork.Whenheselectsnewsoftheotherkindheusuallywithdrawsfromtheworldofthreateningrealitytowardthedreamworld. Foranyindividualofcoursetheboundariesofthesetwoclassesarenotstable.Forexampleasociologistmayreadnewsofcrimeasasocialproblemratherthanforitsimmediatereward.Acoachmayreadasportsstoryforitsthreatvaluehemayhavetoplaythatteamnextweek.Apoliticianmayreadanaccountofhislatestsuccessfulpublicmeetingnotforitsdelayedrewardbutverymuchashiswifereadsanaccountofaparty.Inanygivenstoryofcorruptionordisasterathoughtfulreadermayreceivenotonlytheimmediaterewardofindirectexperiencebutalsothedelayedrewardofinformationandpreparedness.Thereforewhilethedivisionofcategoriesholdsingeneralanindividual'stendencymaytransferanystoryfromonekindofreadingtoanotherordividetheexperiencebetweenthetwokindsofreward. 71. 72. 73. 74. 75. 76. 77. 78. 79. 80.
Theuniversitystartedsomenewlanguageprogramstothecountry'sSilkRoadEconomicBelt. A.applyto B.caterfor C.appealto D.huntfor
ThewholeteamCristianoRonaldoandheseldomletsthemdown. A.waiton B.focuson C.counton D.callon
如图已知AB⊥BCBE∥CD∠DCB=90°平面BCDE⊥平面ABCAB=BC=BE=2CD=4F为AD中点. Ⅰ证明EF⊥平面ACD Ⅱ求直线CE与平面ABD所成角的余弦值.
下列化学用语正确的是
美食是人们造访上海的乐趣之一.visit.
Thepoliceofficersdecidedtoconductathoroughandreviewofthecase. A.comprehensive B.complicated C.conscious D.crucial
“尾气催化转换器”将汽车尾气中的有毒气体转变为无毒气体.其微观过程如图所示其中不同的圆球代表不同的原子.下列说法中正确的是
申请材料需要精心准备这样你心仪的学校才会对你的能力有全面准确的了解.inorderthat.
已知椭圆C=1a>b>0的左右顶点分别为A1A2上下顶点分别为B2B1O为坐标原点四边形A1B1A2B2的面积为4且该四边形内切圆的方程为x2+y2=. Ⅰ求椭圆C的方程 Ⅱ若MN是椭圆C上的两个不同的动点直线OMON的斜率之积等于﹣试探求△OMN的面积是否为定值并说明理由.
在你生命中如果有一个人你需要对他说对不起那么就去向他道歉吧.apologyIfthereissomeoneinyourlifetowhomyouneedtosaysorrygoaheadandmakean apology..
热门题库
更多
高三上学期物理
高三上学期生物
高三上学期化学
高二下学期化学
高二下学期生物
高三下学期生物
高三下学期化学
高三上学期英语
高二下学期英语
教案备课库
高三下学期英语
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库