专业外语复习资料 7页

专业外语复习资料RInradiation,thermalenergyistransformedintoradiantenergy,similarinnaturetolight.热能在辐射时转换成性质与光相似的辐射能2^Theforceupwardequalstheforcedownwardsothattheballoonstaysatthesameheight.向上的力与向下的力相等，所以气球就保持在这一高度。Apartfromprovidingpeoplewithtimber,forestshelpregulateclimate,conservewaterandsoil,wal1offwind,fixsands,improvewaterqua!ity,keepawaysmokeanddust,steri1izer(purify)theair,reducenoice,beautifysurroundings,maintainandimproveecologicalbalance.Manwouldnotbeabletoexistwithoutgreenplantsproducingoxygenandabsorbingharmfulgasesal1thetime.Man'shea1thiscloselyrelatedtothequalityoftheair,whichinturnisdecidedbythesize(extent)offorests.Vldnykindsoftreescanabsorbpoisonousandcancer-causingsubstancesintheair.Theamountofbacteriainaforestareamakeupbut1%ofthatinadeforestedarea・Wh订otheairinadepartmentstorecontainsmorethan4millionbacteriapercubicmeter5.5%NS、2.2%NS、0.5%NS和0.3%NS］对辽东栋种子萌发和幼苗生长的影响•结果表明:辽东栋种子的萌发率和萌发指数在55.4%NS处理达到最大，分別为72.5%和0.22,然后随着光照减弱而逐渐减小，在0.3%NS处理下最小，分别为42.5%和0.11；强光照对种子萌发进程冇一定的延迟作用，萌发活力指数随着光照的减弱而增人(0.5%NS处理最人)；强光下种子萌发的延迟可能是其对多种命运的权衡性选择.强光照有利于辽东栋幼苗基径和根系生长，以及幼苗干物质的积累，但株高最小(6.06cm)；不同光强处理的辽东栋幼苗具有校大的形态学可塑性，其幼苗阶段对光环境的适应性较强，0.5%NS处理的幼苗比叶面积、比枝长、比根长、叶片叶绿素b含量及叶绿素总量均最大，分别为142.57cm2・g-1、156.86cm•g-K271.87cm・g—1、0.07g・cni-2和0.24g・cm—2,55.4%NS处理下最小，分别为44.89cm2•gT、52.84cm•g-l>101.98cm•gT、0.04g•cm-2和0.15g・cm-2；不同光照强度下幼苗根冠比的变化町能是光照和水分共同影响的结果.关键词：辽东栋，光照强度，种子萌发，幼苗生长EffectsoflightintensityonQuercusliaotungensisseedgerminationandseedlinggrowthnaturalsunlight)ontheseedgerminationandliaotungensis.Theseedgerminationrateandhighest(72.5%and0.22,respectively)at55.4%withdecreasinglightintensity,andweretheAbstract：Thispaperstudiedtheeffectsofdifferentshading(55.4%,18.9%,5.5%,2.2%,0.5%,and0.3%seedlinggrowthofQuercusgerminationindexwerethenaturalsunli£ht,declinedlowest(42・5%and0.11,respectively)at0.3%naturalsunlight.Stronglighthaddefinitedelayingeffectonthegermination.Theindexofgerminationvigorincreasedwithdecreasinglightintensity,beingthemaximumst0.5%naturalsunlight.Thedelayofseedgerminationunderstronglightcouldbetheselectivetradeoffonvariedseedfates.StronglightbenefitedthebasalstemdiameterandrootsystemgrowthanddrymassaccumulationofQ・liaotunensisseedling,butresultedintheminimumseedlingsheight(6・06cm)・EffectsoflightintensityonQuercusliaotungensisseedgerminationandseedlinggrowthGreatermorphologicalplasticitywasobservedfortheseedlingsunderdifferentshading,whichlentsupporttothehigheradaptabi1ityoftheseedlingstolight\nenvironmcnt.Forexample,thespecificleafarea,specificshootlength,specificrootlength,andchlorophyllbandtotalchlorophyll\ncontentswerethemaximumat0.5%naturalsunlight,being142・57cm2•g-1,156.86cm•g~l,271.87cm•g-1,0.07g•cm-2,and0.24g•cm~2,respectively,andtheminimumat55・4%naturalsunlight,being44.89cm2•g-1,52.84cm•g-1,101.98cm•g-1,0.04g•cm-2,and0.15g•cm-2,respectively.Thevariationoftheroot/shootratioofQ・liaotungensisseedlingsunderdifferentshadingcouldbetheeffectsofthecombinationoflightintensityandwateravailability.Keywords：Quercus1iaotungensis1ightintensityseedgerminationseedlinggrowth—7、heart-warmingtough-minedEastChinanorthandsouth,eastandwestsharethewealandwoerainandshineinconsistencyofdeedswithwordstheironandsteelindustryquickofeyeanddeftofhandfood,clothing,shelterandtransportationyou,heandIbackandforth,toandfroeverymeanspossible暖人心的意志坚定的华东东南西北祸福与共无论晴雨言行不一\n钢铁T业手疾眼快衣食住行我、你、他前前后后，來來去去一切可能的手段8、Theyoftentalkhorse.Thatwomanwalksthestreets.I’11reportthatofficial.Themachinoisinrepair.We，11standuptotheproject.Don"tmakeafussofthem.Sheisinthedock.Thebossgaveherthesack・Thatgirlstudentisinthegreen.Theoldladyhasgonetoherrest.Thatyoungmanhaslosthisheart.Theoldmanoftentakeshismedicine.Thatfellowdidhardlaborfor3years.Thewomaninlaborishiswife.I'mnotalittleafraidofsnakes.Wechargedhimtodoit.Theysurprisedhimdoingit.1haveseenhimthrough・HeistheSpeaker.WhereistheBook?Doyouknowanythingaboutjapan?Iboughtsomesaltsyesterday.Themanisinthedumps.Don'tcallhimnames!Thelittleboyisalovechild.Heisaconfidoncoman.Heisamedicineman.Whatheboughtisinvaluable.Thisisadisusedmachine.Heisdisinterestedintheaffairs.他们常常吹牛。那个妇女是妓女。我要检举那位官员。那台机器状况良好。我们将抵制这个计划。别讨好他们！她在被告席。\n老板解雇了她。那女学生正值豆蔻年华。那个老太太安息了。那个青年人处于热恋之中。那老人常忍受不愉快的事。那个家伙服过三年劳役。分娩的妇女是他得妻子。我很害怕蛇.我们责令他干那事。他们撞上他做那个事。我帮助他过难关。他是议长。《圣经》在哪？你了解口本漆吗？我昨天买了一些泻药。那个人神情沮丧。别骂他！那个小男孩是私生子。他是个骗子。他是个巫医。他买的东西价值连城。这是一台废弃的机器。他在此事上公正无私。