英语四级阅读理解考试题及答案.pdf

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英语四级阅读理解考试题及答案

英语四级阅读理解考试题及答案

在日常学习、工作生活中,我们总免不了要接触或使用试题,借

助试题可以检验考试者是否已经具备获得某种资格的基本能力。一份

好的试题都是什么样子的呢?下面是店铺为大家收集的英语四级阅读

理解考试题及答案,希望能够帮助到大家。

英语四级阅读理解考试题及答案篇1

Treesshouldonlybeprunedwhenthereisagoodandclear

reasonfordoingsoand,fortunately,thenumberofsuchreasons

issmall.Pruninginvolvesthecuttingawayofobergrownand

unwantedbranches,andtheinexperiencedgardenercanbe

encouragedbythethoughtthatmoredamageresultsfrom

doingitunnecessarilythanfromleavingthetreetogrowinits

ownway.

First,pruningmaybedonetomakesurethattreeshavea

desiredshapeorsize.Theobjectmaybetogetatreeoftheright

height,andatthesametimetohelpthegrowthofsmallside

brancheswhichwillthickenitsappearanceorgiveitaspecial

shape.Secondly,pruningmaybedonetomakethetreehealthier.

Youmaycutdiseaedordeadwood,orbranchesthatarerubbing

againsteachotherandthuscausewounds.Thehealthofatree

maybeencouragedbyremovingbranchesthatareblockingup

thecentreandsopreventingthefreemovementofair.

Oneresultofpruningisthatanopenwoundisleftonthe

treeandthisprovidesaneasyentryfordisease,butitisawound

thatwillheal.Oftenthereisaracebetweenthehealingandthe

deseaseastowhetherthetreewillliveordie,sothatthereisa

periodwhenthetreeisatrisk.Itshouldbetheaimofevery

gardenertoreducewhichhasbeenprunedsmoothandclean,

forhealingwillbesloweddownbyroughness.Youshouldallow

thecutsurfacetodryforafewhursandthenpaintitwithoneof

thesubstancesavailablefromgardenshopsproducedespecially

forthispurpose.Pruningisusuallywithoutinterferencefromthe

leavesandalsoitisveryunlikelythatthecutsyumakewillbleed.

Ifthisdoeshap

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