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1、P102理解立支架P104大树移栽树木胸径P104抗蒸腾剂的作用机理三种类型P107断根缩坨：为了提高大树的移栽成活率，在实施移栽操作之前一到两年期间，在根基周围一定的距离内切断大部分的植物根系这样的操作方法称为断根缩坨。P108根据包扎的材料不同，大树移栽可分为P129更新修剪：对衰老树木进行强度修剪，将树冠上的主、侧枝分次锯除，可刺激隐芽萌发长出新枝，选留其中一些有培养前途的新枝代替原有老枝，进而形成新的树冠，这种修剪称之为更新修剪。P138理解短截方法及幅度P138无论是生长季还是休眠季树木的修剪方法可
2、概括为五个字。P139树木常规修剪P142理解摘心的作用P150-152观赏树木的整形方式主要有三种。urbantrafficstructureintheurbanpublictransportsystem,railtrafficwithafast,largecapacity,lowpollutionandhighefficiency,becomeanindispensablepartofurbantrafficstructure,isthecontradictionbetweensupplyanddeman
3、dofthegrowingmetropolis,cities,effectivemeanstomeettheneedsofurbantraffic.Thefollowingtableisarailtransportandothermodesofurbanpassengertransportcapacity,transportationspeedandresourceconsumption,andsoon.Comparisonofurbanpassengertrafficcharacteristicstable
4、5.1-2trafficvolume(human/h)transportspeed(km/people)Roadareaoccupied(M2/people)scopebike2,00010-153,000shortcar20-5010-20widebus6,000-9,0001-240-600.25-0.5fromtheMetrolightrailof10,000-30,000inlong-distanceline3Morethan0,00040-60donotoccupyanareabothinterms
5、oftransportoverlongdistances,transportefficiency,orfromthelevelofresourceconsumptionandenvironmentalpollution,railtransportisundoubtedlyaneffectivemeanstosolvetheproblemoftrafficcongestionincities.Especiallyinurbanpopulationstrengthenormoustrafficdemandonth
6、eroutetoeasetrafficpressure,railtransportationhasincomparableadvantages.Washington,DC,areaof177km2,andapopulationof600,000,isaUnitedStatespoliticalcenter.FortheWashingtonMetrosystemUnitedStatessecond-busiestsubway,secondonlytotheNewYorksubway,openedin1976.C
7、urrentrailsizesfor5,station86,total171.6km,netannualpassengervolumereached223millionpeople.Accordingtostatistics,from2000to2009vehicletripdown12.7%,bustravelhasincreasedby12%.ObjectivesoftheWashingtonMetrosystemboilsdowntothefollowingthreepoints:bydrivingon
8、tothetracksatthestationtransfermodeinordertoalleviatetrafficcongestion;Forthosewhowillnotorcannotdrivethepersonwithabetteroptionthanconventionalpublictransit;BlockhighwayP156补偿修剪：新栽树木在早春气温回升特别快而土壤温度升高相
