校长为学校学生道路交通安全工作第一责任人,负责校(园)内的道路交通安全管理工作和学生出行的道路交通安全教育,以及学生春(秋)游和其他教育教学活动的道路交通安全管理工作centerpinchecksandanchoringtheinnercylinder.AccordingtoWhilecouplingalignmentshouldkeepoiloutofcavityandlocatetherotoraxisneckraisedarewithintheprescribedlimits,thereshouldbenogaps,Horn,HornandHorn0.05mmfeelergaugesfitinto.Centercoupling,condenserwaterfillingandwater-filledaccordingtofactoryrequirement.ForcouplingthreesupportedrotorCenter,themouthunderthecouplingbetweenthevalueshouldbeasstipulatedinthemanufacturer,usually0.15~0.25mm.Inthecaseofcouplingconnection,ifpossible,liftingonlyonebearingendofthesupportbearingoftherotor,removethebearing,fittedwithspecialtilesandspecialliftingtools,discrotors,checkthejournalfluttertile,shouldgenerallybelessthan0.10MM.Whenthecouplingsandrotorcomeswhenthereisaconflict,thecouplingCentreshallprevail.6.4.5.2.2shaftlookingfor:...6.4.5.3.Provisionalboltconfirmedthepositioningoftherotorsize,aswellasthecouplingbetweentheadjustmentshimthicknessaccuracy,drawingstomeetthetechnicalrequirements.Plane,cylindricalandcleanthecouplingboltholesshouldbecleanandwithoutburrs,scrapironandgrease-free,relativepositionofthecouplingaccordingtothedrawingrequirementsare.Couplingtopscrews,rounddistanceapart,indicatorstomonitormovementoftheaircraft,itsvalueisallowedtopassthevalueaxismoving,mountedadjustmentpads,notepadsinstallationdirectionguidepincouplingwithprocessendclosed.Thebackwheelsslowlytightened,when2mmorso,withstandardwhitebarswheretwobackwheelboltholemeasurementaboveandbelow,confirmtwobackwheelboltholeconcentricity.Then,thesymmetricalhorizontalmounttwotemporaryboltstightened,attentiontomonitordialindicator,theninstallthesymmetricaltemporarybolts,thistimesitesslowlymovingrotor,inthemeasuredcircumferenceof8equalpartsbackwheelrimrock,eachmeasuringrelativechangesinvalueshouldbelessthan0.02mm.6.4.5.4couplingreamedandpairedboltreamingdiereamer,adjustablereamers,boringmill,inseveralways.6.4.5.4.1Generalrequirementsbeforereamingorboring,【知识要点】1.分析题目确定单位“1”2.准确找到量所对应的率,利用量÷对应率=单位“1”解题3.抓住不变量,统一单位“1”一、知识点概述分数应用题是研究数量之间份数关系的典型应用题,一方面它是在整数应用题上的延续和深化,另一方面,它有其自身的特点和解题规律.在解这类问题时,分析中数量之间的关系,准确找出“量”与“率”之间的对应是解题的关键.关键:分数应用题经常要涉及到两个或两个以上的量,我们往往把其中的一个量看作是标准量.也称为:单位“1”,进行对比分析。在几个量中,关键也是要找准单位“1”和对应的百分率,以及对应量三者的关系例如:(1)a是b的几分之几,就把数b看作单位“1”.(2)甲比乙多18,乙比甲少几分之几?方法一:可设乙为单位“1”,则甲为19188,因此乙比甲少191889.方法二:可设乙为8份,则甲为9份,因此乙比甲少1199.二、怎样找准分数应用题中单位“1”(一)、部分数和总数在同一整体中,部分数和总数作比较关系时,部分数通常作为比较量,而总数则作为标准量,那么总数就是单位“1”。例如:我国人口约占世界人口的几分之几?——世界人口是总数,我国人口是部分数,世界人口就是单位“1”。解答题关键:只要找准总数和部分数,确定单位“1”就很容易了。(二)、两种数量比较分数应用题中,两种数量相比的关键句非常多。有的是“比”字句,有的则没有“比”字,而是带有指向性特征的“占”、“是”、“相当于”。在含有“比”字的关键句中,比后面的那个数量通常就作为标准量,也就是单位“1”。例如:六(2)班男生比女生多——就是以女生人数为标准(单位“1”),解题关键:在另外一种没有比字的两种量相比的时候,我们通常找到分率,看“占”谁的,“相当于”谁的,“是”谁的几分之几。这个“占”,“相当于”,“是”后面的数量——谁就是单位“!”。(三)、原数量与现数量有的关键句中不是很明显地带有一些指向性特征的词语,也不是部分数和总数的关系。这类分数应用题的单位“1”比较难找。需要将题目文字完善成我们熟悉的类似带“比”的文字,然后在分析。例如:水结成冰后体积增加了,冰融化成水后,体积减少了。完善后:水结成冰后体积增加了→“水结成冰后体积比原来增加了”→原来的水是单位“1”冰融化成水后,体积减少了→“冰融化成水后,体积比原来减少了”→原来的冰是单位“1”解题关键:要结合语文知识将题目简化的文字丰富后在分六年级单位“1”应用题之分类及拔高专讲校长为学校学生道路交通安全工作第一责任人,负责校(园)内的道路交通安全管理工作和学生出行的道路交通安全教育,以及学生春(秋)游和其他教育教学活动的道路交通安全管理工作centerpinchecksandanchoringtheinnercylinder.AccordingtoWhilecouplingalignmentshouldkeepoiloutofcavityandlocatetherotoraxisneckraisedarewithintheprescribedlimits,thereshouldbenogaps,Horn,HornandHorn0.05mmfeelergaugesfitinto.Centercoupling,condenserwaterfillingandwater-filledaccordingtofactoryrequirement.ForcouplingthreesupportedrotorCenter,themouthunderthecouplingbetweenthevalueshouldbeasstipulatedinthemanufacturer,usually0.15~0.25mm.Inthecaseofcouplingconnection,ifpossible,liftingonlyonebearingendofthesupportbearingoftherotor,removethebearing,fittedwithspecialtilesandspecialliftingtools,discrotors,checkthejournalfluttertile,shouldgenerallybelessthan0.10MM.Whenthecouplingsandrotorcomeswhenthereisaconflict,thecouplingCentreshallprevail.6.4.5.2.2shaftlookingfor:...6.4.5.3.Provisionalboltconfirmedthepositioningoftherotorsize,aswellasthecouplingbetweentheadjustmentshimthicknessaccuracy,drawingstomeetthetechnicalrequirements.Plane,cylindricalandcleanthecouplingboltholesshouldbecleanandwithoutburrs,scrapironandgrease-free,relativepositionofthecouplingaccordingtothedrawingrequirementsare.Couplingtopscrews,rounddistanceapart,indicatorstomonitormovementoftheaircraft,itsvalueisallowedtopassthevalueaxismoving,mountedadjustmentpads,notepadsinstallationdirectionguidepincouplingwithprocessendclosed.Thebackwheelsslowlytightened,when2mmorso,withstandardwhitebarswheretwobackwheelboltholemeasurementaboveandbelow,confirmtwobackwheelboltholeconcentricity.Then,thesymmetricalhorizontalmounttwotemporaryboltstightened,attentiontomonitordialindicator,theninstallthesymmetricaltemporarybolts,thistimesitesslowlymovingrotor,inthemeasuredcircumferenceof8equalpartsbackwheelrimrock,eachmeasuringrelativechangesinvalueshouldbelessthan0.02mm.6.4.5.4couplingreamedandpairedboltreamingdiereamer,adjustablereamers,boringmill,inseveralways.6.4.5.4.1Generalrequirementsbeforereamingorboring,2【典型例题】例题精讲【例1】(小数报数学竞赛初赛)甲、乙两人星期天一起上街买东西,两人