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(修剪) when there is a good and clear reason for doing so and, fortunately, the number of such reasons
Trees should only be pruned(修剪) when there is a good and clear reason for doing so and, fortunately, the number of such reasons
admin
2017-03-21
20
问题
Trees should only be pruned(修剪) 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 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 as far as possible. It is important to make that 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 can we do to keep trees away from disease?
选项
A、Paint the cut surface as soon as possible.
B、Make the cut surface rougher.
C、Cover the cut surface with anything available.
D、Make the cut surface smooth and clean.
答案
D
解析
细节理解题。根据第三段第四、五句可知要使树远离疾病,需要对被修剪的伤口进行合理处理,使它更加平整、干净。故选D项。
转载请注明原文地址:https://kaotiyun.com/show/OPXC777K
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
Youshould______thesetablesandbuynewones.
Sixteenyearsago,EileenDoyle’shusband,anengineer,tookhisfourchildrenupforanearlymorningcupoftea,packedasmal
Whotalksmore,then,womenormen?Theseeminglycontradictory(矛盾的)evidenceisshownbythedifferencebetweenwhatIcallpubl
Honeybeescannotlivealone.Theirbodystructureandinstinctsequipthemforlifeinacolony(群居)orcommunity,wheretheyhave
Tofindoutwhattheweatherisgoingtobe,mostpeoplegostraighttotheradio,televisionornewspapertogetanexpertweat
Theoldladywas______totheyoungmanwhohelpedherfindherlostgrandson.
Inspiteofthestrongoppositiontonewandstrictenvironmentallaws,however,itisstillpossibletoattacktheproblemofc
(84)Itisoftendifficultforamantobequitesurewhattaxheoughttopaytothegovernmentbecauseitdependsonsomanydi
Wereitnotforthetelevision,we______theeventsthatarehappeninginotherplaces.
随机试题
关于小儿遗尿的描述哪项是不正确的:
有助于癌性胸腔积液的检查方法为
由于半影造成的影像模糊称为
女性,32岁,突发右下腹绞痛,伴有恶心、呕吐。体格检查腹部平坦,软,右下腹有深压痛,右肋脊点有叩痛,血白细胞9.8×109/L,中性粒细胞40%。尿镜检白细胞5个/HP,红细胞10个/HP,考虑其最可能的诊断是()
影响软膏剂中药物释放、穿透与吸收的因素正确的表述为
下列费用中,事先准备好、并在项目预算中单独列出的是( )。
重视调查研究是我们党做好领导工作的重要传家宝。()
请用“夕阳”“城管”“市场”“微笑”“感动”这五个词编一个故事。
陈某与陆某是邻居。陈某家建房挖地基,导致陆某房屋墙面出现裂缝。陆某遂找陈某要求修缮,遭到陈某拒绝。关于本案,下列说法正确的是:
知觉者的知识经验,以及对事物的需要、兴趣、爱好、对活动的预先准备状态和期待等,都会在一定程度上影响到知觉的过程和结果,这种加工叫()
最新回复
(
0
)