首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Trees should only be pruned (修剪, 整枝) when there is a good and clear reason for doing so and, fortunately, the number of such rea
Trees should only be pruned (修剪, 整枝) when there is a good and clear reason for doing so and, fortunately, the number of such rea
admin
2014-04-23
66
问题
Trees should only be pruned (修剪, 整枝) when there is a good and clear reason for doing so and, fortunately, the number of such reasons is small. Pruning involves the cutting away of overgrown and unwanted branches, and the inexperienced gardener can be encouraged by the thought that more damage results from doing it unnecessarily than from leaving the tree to grow in its own way.
First, pruning may be done to make sure that trees have a desired shape or size. The object may be to get a tree of the right height, and at the same time to help the growth of small side branches which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut out diseased or dead wood, or branches that are rubbing against each other and thus causing wounds. The health of a tree may be encouraged by removing branches that are blocking up the centre and so preventing the free movement of air.
One result of pruning is that an open wound is left on the tree and this provides an easy entry for disease, but it is a wound that will heal. Often there is a race between the healing and the disease as to whether the tree will live or die, so that there is a period when the tree is at risk. It should be the aim of every gardener to reduce that risk of death as far as possible. It is essential to make the wound on the tree which has been pruned smooth and clean for healing will be slowed down by roughness. You should allow the cut surface to dry for a few hours and then paint it with one of the substances available from garden shops produced especially for this purpose. Pruning is usually done in winter, for then you can see the shape of the tree clearly without interference from the leaves and it is. too very unlikely that the cuts you make will bleed. If this does happen, it is, of course, impossible to paint them properly.
Trees become unhealthy if the gardener______.
选项
A、damages some of the small side branches
B、forces them to grow too quickly
C、does not protect them from the wind
D、allows too many branches to grow in the middle
答案
D
解析
本题是一道具体细节题。问如果园丁怎样做树木就会生病。利用查阅式阅读法,我们可以在文章的第二段的后半部分中找到相关内容。这部分指出,可以通过剪枝增进树的健康,可以砍掉病死枝干或互相摩擦的树枝以防磨伤。将生长在树中央阻碍空气流通的枝条剪掉可以有利于树的健康。因此,本题的正确答案应是D“听任树中间部分的许多树枝任意生长”。
转载请注明原文地址:https://kaotiyun.com/show/W9WO777K
0
在职攻硕英语联考
相关试题推荐
HowtoGetPreservedasaFossil【M1】Unfortunatelythechangesofanyanimalbecomeafossilarenotverygreat,and【M2】the
Thesenatorwasmadetodigresstimeandagainfromthemainpointofhisspeechbecauseofthered______constantly______byhis
Effortstoreachtheinjuredmenhavebeen______becauseofasuddendeteriorationinweatherconditions.
Pronouncingalanguageisaskill.Everynormalpersonisexpertintheskillofpronouncinghisownlanguage,butfewpeoplear
Pronouncingalanguageisaskill.Everynormalpersonisexpertintheskillofpronouncinghisownlanguage,butfewpeoplear
Webbrowsers!Interactivesoftware!There’salotofnewtechnologytalkgoingoninpublicrelationsthesedays,andit’scomin
Nosehasitprettyhard,Boxersflattenthem.Doctorsrearrangethem.Peoplemakejokesabouttheirunflatteringcharacteristics
Theoriesaccountingforthephysicalprocessofcolorvisionhaveundergonemanychangessince1801,whenThomasYoungfirstsug
Theoriesaccountingforthephysicalprocessofcolorvisionhaveundergonemanychangessince1801,whenThomasYoungfirstsug
Onlyahandfulofcreaturesonearthcarrythedreadtitle"man-eater".Thegreatwhitesharkisone,quickattimessnapupswi
随机试题
患者,男,48岁。12天前因剧烈头痛伴有恶心、呕吐就诊,查颅脑CT提示蛛网膜下腔出血,经治疗后病情稳定出院,现再次出现剧烈头痛、呕吐、抽搐、昏迷,其原因最可能是
一方面提高差油层的油层压力,另一方面()好油层的油层压力,是解决层间矛盾的有效措施。
李某大学计算机专业毕业后首先进入一家互联网公司,从事网站建设与维护工作,在不到三年的工作时间里,酸甜苦辣都经历过,重要的是李某积累了一些经验。后来,由于某些原因,他不得不选择离开这家公司。这段经历使他感受到了互联网的魅力,认为互联网具有无限商机,而且认为:
肛梳又可称为()
空间线性是SPECT质控的一项重要内容,其反映了线性描述图像的畸变程度,绝对线性由X及Y方向的线扩展函数峰值偏离最大距离的平均值表示,绝对线性应控制小于
患儿,男12岁,既往有肺结核病、癫痫史,因咳嗽、急性哮喘就诊,经检查,肺功能下降,心率50次/分,应考虑的平喘药是
网络计划工期Tp和计算工期Tc的计算错误的是( )。
2009年底竣工的年产量20万吨的某生产项目投资额为5000万元,2011年底拟建年产量为30万吨的类似项目。已知生产能力指数为0.9,2009年至2011年每年价格上涨幅度为3%,则采用生产能力指数法估算的拟建项目投资额为()万元。
在证券经纪业务中,包含的要素有:委托人、证券经纪商、证券交易所和证券交易对象。( )
日前微型机上所使用的鼠标器应连接到
最新回复
(
0
)