首页
登录
职称英语
Trees are useful to man in three important ways: they provide him with wood
Trees are useful to man in three important ways: they provide him with wood
游客
2024-01-20
44
管理
问题
Trees are useful to man in three important ways: they provide him with wood and other products; they give him shade; and they help to prevent droughts and floods.
Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. (78) In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear.
This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil--allowing the rain to sink in--and also bind the soil, thus preventing it from being washed away easily; but where there are no trees, the rain falls oh hard ground and flows away, causing floods and carrying away the rich top-soil. When all the top-soil is gone, nothing remains but worthless desert.
Two thousand years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It set up the empire but, without its trees, its soil became poor and it grew weak. When the empire fell to pieces; the home country found itself faced with floods and starvation. [br] Why do forests in many parts of the world slowly disappear?
选项
A、New trees are not looked after properly.
B、Many trees have been cut down by man.
C、Man has not paid enough attention to planting trees.
D、All of the above.
答案
D
解析
事实细节题。第二段说明了森林逐渐减少的原因,可知D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3377826.html
相关试题推荐
[originaltext](4)QueenElizabethIIissetreachanimportantmilestoneth
[originaltext](4)QueenElizabethIIissettoreachanimportantmilestone
[originaltext](4)QueenElizabethIIissettoreachanimportantmilestone
[originaltext]QueenElizabethⅡissettoreachanimportantmilestonethiswee
[originaltext](3)ElevenTalibanfightersattackedanimportantairportins
[originaltext](3)ElevenTalibanfightersattackedanimportantairportins
[originaltext]Agriculturalexpertssaycropdiversityisimportanttofeed
[originaltext](4)QueenElizabethIIissettoreachanimportantmilestone
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
随机试题
[originaltext]Iamwritingtothankyoufortheinterestingreportswhicha
Foralongtimewehaveworkedhardatisolatingtheindividualfamily.This
景德镇,原名昌南,位于江西省境内。景德镇历史悠久,是中国历史上的四大名镇之一。景德镇因其瓷器(chinaware)的生产而闻名,据记载,其瓷器生产可以追
中枢神经系统白血病的诊断标准是A.脑脊液中蛋白总量>50mg/L,潘氏试验阳性
用油镜观察到颗粒型荧光核型,表示自身免疫病(AID)患者血清中含有以下抗核抗体A
计算基础代谢率(BMP)的公式正确的是A.BMR=脉率+收缩压-111 B.B
按测验的目的分类可分为诊断性测验、终结性测验和( )。 A.形成性测
什么是多动症?多动症幼儿行为的基本特征有哪些?
翻译工作,是一种成果供他人消费的智力劳动,作为劳动者的翻译工作者必须同一切劳动者
按照《建设项目水资源论证管理办法》的规定,从()起,凡是直接从江河、湖泊或地下
最新回复
(
0
)