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
71
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
Rockclimbingissopopularnowthatmanypeopleareableto______thesteepestf
[originaltext]1.JohnandLisa’sskillsarecomplementary:she’sgoodatroutin
个人保证贷款仅包括以银行认可的、具有代位清偿债务能力的法人或其他经济组织作为保证
单位资本项目外汇账户包括()。A.贷款专户 B.外债及转贷款专户 C.还贷
《证券法》《证券业从业人员执业行为准则》对证券业从业人员的执业行为作出了具体规定
骨髓检查可以诊断的造血系统疾病为A.疟疾B.戈谢病C.脾亢D.黑热病E.SLE
糖皮质激素对血液和造血系统的作用是A:刺激骨髓造血功能 B:使红细胞与血红蛋白
期末同一合同下的合同资产净额大于合同负债净额的差额,如超过一年或一个正常营业周期
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
关于斜井排水的做法,正确的是()。A.工作面排水应采用大能力卧泵 B.一级排
最新回复
(
0
)