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
公务员
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
2011-01-01
127
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 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 trees to grow in their own ways.
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 the branches that are locking up the centre and so preventing the free movement of air.
One result of pruning is that an open would is left on the tree and this provides an easy entry for diseases, but it is a wound that will heal(愈合). Often there is a race between the healing and the disease as to whether the tree will live or die, or that there is a period when the tree is at risk. It should be the aim of every gardener to reduce the risk 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 t, 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 the interference(妨碍) 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.
Why is a special material painted on the tree?
选项
A、Because it can help a wound to dry.
B、Because it can cover a rough surface.
C、Because it can make a wound smooth.
D、Because it can prevent disease entering a wound.
答案
D
解析
第三段的第一句就指出剪枝后的伤口容易染病,下文中又提到让伤口快 点愈合的方法就是让伤口晾干几个小时,然后涂上一种专门用于此用途的物质。由此可知D 项符合题意。
转载请注明原文地址:https://kaotiyun.com/show/RKBq777K
本试题收录于:
中学英语题库教师公开招聘分类
0
中学英语
教师公开招聘
相关试题推荐
课程改革主要是教育行政部门和课程改革专家的事,其成功与否与教师无关。()
中国已投产运行的1000kV特高压输电,是目前世界上电压最高的输电工程。假设甲、乙两地原来用500kV的超高压输电,在保持输送电功率和输电线电阻都不变的条件下,现改用1000kV特高压输电,不考虑其他因素的影响,则()。
DanielleSteel,America’ssweetheart,isoneofthehardestworkingwomeninthebookbusiness.Unlikeotherproductiveauthors
Howshouldoneinvestasumofmoneyinthesedaysofinflation(通货膨胀)?Leftinabankitwillhardlykeepitsvalue,howeverhi
Sincethebeginningofhumanevolution,menhavemigrated(迁移)acrosscontinentsinsearchoffood,shelter,safety,andcomforta
Therearemanykindsoffriends.Somearealways【C1】______you,butdon’tunderstandyou.Somesay"onlyafewwordstoyou,but
Therearemanykindsoffriends.Somearealways【C1】______you,butdon’tunderstandyou.Somesay"onlyafewwordstoyou,but
______ofmytwobrothers______goodatEnglish.
随机试题
Withanappropriaterelativepronounorrelativeadverb:HehasleftBeijing,_______ameetingistobeheld.
在前臂前区,腕掌侧远端横纹上5寸,掌长肌腱与桡侧腕屈肌腱之间的穴位是
下列工程建造活动中的工种,属于特殊作业人员的有()。
在计算机中,账簿文件或者数据库只能设置一个。()
会计职业道德教育的主要内容包括()。
按照犹太教的救世主义,时间往往在______中充分地呈现出来,但又同时与呈现过或未呈现过的时间以不同程度的模糊性______着,这种时间观,完全不同于近现代历史主义所想象的连续的、一线性的时间。依次填入划横线处的词语,最恰当的一组是()
(2010年黑龙江.37)168,183,195,210,()。
对应ASCII码表,下列有关ASCII码值大小关系描述正确的是
TheGeneIndustryMajorcompaniesarealreadyinpursuitofcommercialapplicationsofthenewbiology.Theydreamofplacin
Opinionsvarywidelyconcerningworkplaceromance.Someorganizations,ontheassumptionthatromanticrelationshipsarebasical
最新回复
(
0
)