首页
登录
职称英语
Trees should only be pruned when there is a good and clear reason for doing s
Trees should only be pruned when there is a good and clear reason for doing s
游客
2025-03-30
24
管理
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 center 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 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. [br] A good gardener prunes a tree______.
选项
A、at intervals throughout the year
B、as quickly as possible
C、occasionally when necessary
D、regular every winter
答案
C
解析
根据第一段第一句可知,只有在理由充分且明确时才应该修剪树木,也就是说只在必要的情况下才修剪树木,C项正确。
转载请注明原文地址:https://tihaiku.com/zcyy/4019279.html
相关试题推荐
Treesshouldonlybeprunedwhenthereisagoodandclearreasonfordoings
Treesshouldonlybeprunedwhenthereisagoodandclearreasonfordoings
Treesshouldonlybeprunedwhenthereisagoodandclearreasonfordoings
TheFrenchmathematiciandeLaplacenextreasonedthatifenoughmass______added
Itisintendedthattheseguidelinesshouldbeappliedflexiblyand______.A、subs
Allthearrangementsshouldbecompleted______yourdeparture.A、priortoB、dueto
Inordertoobtaintheneededinformation,youshouldwritesimply,clearly,and
Writeanessaybasedonthefollowingchart.Inyourwriting,youshould
Manyofthestudentshaveagraspofthemainstructures,areasonablevocabular
Advertisingcostsarenolongerinreasonable______tototalcostoftheproduct.
随机试题
Whatisthetalkmainlyabout?[originaltext]StartingonMonday,February13,al
Themanistryingtofind[originaltext]M:Excuseme,I’mtryingtofindarticle
Sinceancienttimes,peoplehavedreamedofleavingtheirhomeplanetandexp
BeingwithSeamusHeaneywaslikebeingwithtwopeopleatonce.Ontheone
[originaltext]AninternationalRomanCatholicorganizationsayshumanright
“錢—钱”采用的简化方法是( )。A.草书楷化 B.同音代替 C.简化偏旁
女性,45岁,性交后出血1月,查体发现子宫颈糜烂样改变,接触性出血阳性,首选的处
关于桩身材料的密度,下列正确的是()A.一般,砼灌注桩的桩身材料质量密度为2.
中国公民李某进行兼职,取得工程设计收入20000元,从中拿出5000元,直接捐赠
关于废水生物处理的说法,正确的是()。A.改进曝气类型适用于需要实现过高去
最新回复
(
0
)