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
专升本
Trees should only be pruned when there is a good and clear reason for doing so and, fortunately, the number of such reasons is s
Trees should only be pruned when there is a good and clear reason for doing so and, fortunately, the number of such reasons is s
admin
2019-05-23
45
问题
Trees should only be pruned 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 diseased or dead wood, or branches that are rubbing against each other and thus cause 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 all open wound is left on the tree and this provides an easy entry for disease, but it’s 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 area 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 without interference from the leaves and also it is very unlikely that the cuts you make will bleed. If this does happen, it is, of course, impossible to paint them properly.
What was the author’s purpose when writing this passage?
选项
A、To give practical instruction for pruning a tree.
B、To give a general description of pruning.
C、To explain how trees develop diseases.
D、To discuss different methods of pruning.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/uBDC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Inmanycountriesthelawforbidscitizenstocarrypistolsorrifleswithoutfirst______aspecialpermit.
In99casesoutof100,insomnia(失眠)iscausedbyadisturbanceofthenaturalsleeprhythm.Thereasonswhytherhythmhasbee
Thehumanbraincontains10thousandmillioncellsandeachofthesemayhaveathousandconnections.Suchenormousnumbersused
Thehumanbraincontains10thousandmillioncellsandeachofthesemayhaveathousandconnections.Suchenormousnumbersused
ItwouldAsavehimBmuchtroubleifheChasknownhertelephoneDnumber.
Americanssufferfromanoverdoseofwork.Regardless【C1】______whotheyareorwhattheydo,Americansspend【C2】______timeatwo
Somecompanieshaveintroducedflexibleworkingtimewithlessemphasisonpressure______.
Whydowelaugh?Foryearsscientistshaveaskedthemselvesthisquestion.Noanimalslaughandsmile—onlyhumanbeingsdo.Sod
Whydowelaugh?Foryearsscientistshaveaskedthemselvesthisquestion.Noanimalslaughandsmile—onlyhumanbeingsdo.Sod
随机试题
《证券法》主要修订的内容包括()。Ⅰ.完善了上市公司的监管制度,提高上市公司质量Ⅱ.加强对证券公司监管,防范和化解证券市场风险Ⅲ.加强对投资者特别是中小投资者权益的保护力度,建立证券投资者保护基金制度Ⅳ.对分业经营和管理、现货交
什么是生理依赖性和精神依赖性?哪些药物易产生依赖性?
A.消食化滞,理气和胃B.健脾和胃,消食止泻C.消食导滞,清热祛湿D.消食导滞,攻积泄热E.温阳健脾,和胃消食保和丸的功效是
以下说法正确的是()
一项工程项目实施完成后,很难推倒重来,这体现了工程建设具有()。
下列关于带电体灭火的操作方法正确的是()。
招标结束后,招标人应将( )退还给未中标的投标人。
心理学家们曾做过这样一个实验:在给小小的缝衣针穿线的时候,你越是全神贯注地努力,线越不容易穿入。在科学界,这种现象被称为“目的颤抖”,也叫“穿针心理”,就是目的性越强就越不容易成功。根据上述定义,下列各项没有体现“穿针心理”的是:
1947年,台湾省人民为反抗国民党当局的暴政举行了()。
Givemeyourtelephonenumber______Ineedyourhelp.
最新回复
(
0
)