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
外语
Trees are useful to man in three very important ways: they supply him with wood and other products ;they give him shade; and the
Trees are useful to man in three very important ways: they supply him with wood and other products ;they give him shade; and the
admin
2011-01-21
82
问题
Trees are useful to man in three very important ways: they supply 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. In his eagerness to draw quick profit from the trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. 2 000 years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It gained the empire but, without its trees, its soil became hard and poor. When the empire fell to pieces, the home country found itself faced floods and starvation.
Even if a government realizes the importance of adequate supply of trees, it is difficult for it to persuade the villager to see this. The villager wants wood to cook his food with; and he can earn money by producing charcoal or selling wood to the townsman. He is usually too lazy or too careless to plant and take care of new trees. So, unless the government has a good control system, or can educate the people, the forests will slowly disappear.
This does not only mean that the villager’s sons and grandsons have fewer trees. The results are even more serious: for where there are trees their roots break the soil up -- allowing the rain to sink in -- and also bind the soil, thus preventing its being washed away easily; but where there are no trees, the rain falls on hard ground and flows away from the surface, causing floods and carrying away with it the rich topsoil , in which crops grow so well. When all the top soil is gone, nothing remains but a useless desert.
What does the passage mainly talk about?
选项
A、The three benefits provided by trees.
B、Trees and soil conservation.
C、The various uses of trees.
D、The different attitudes of the government and the villagers toward trees.
答案
B
解析
本文主要讲述水的作用以及水土保持。
转载请注明原文地址:https://kaotiyun.com/show/Q13d777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Onlythreestrategiesareavailableforcontrollingcancer:prevention,screeningandtreatment.Lungcancercausesmoredeaths
Theinitialimpactofcomputerswasintheareaofentertainment.Ifyouwalkedbyavideoarcadeintheearly1980s,youcould
Theinitialimpactofcomputerswasintheareaofentertainment.Ifyouwalkedbyavideoarcadeintheearly1980s,youcould
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand1
VitalismversusMechanism从“I’dliketobeginmyfirstlecturebyintroducingtwoimportantterms”知道第一课介绍VitalismversusMechanis
Doanimalshaverights?Thisishowthequestionisusuallyput.Itsoundslikeauseful,ground-clearingwaytostart.61)Actu
Nowadays,airtravelisvery【C1】______WearenotsurprisedwhenwewatchonTVthatapoliticianhastalkedwithFrenchPresiden
WhatdoesProfessorMorgando?
WhatdoesProfessorMorgando?
Whydoesthewomantalktotheprofessor?
随机试题
A、secondB、ThursdayC、presidentD、hesitateA
下列哪项是宫颈原位癌
气虚发热证的病机为阴虚发热证的病机为
消化液中最重要的是
某企业生产某一产品,年销售收入为100万元,变动成本总额为60万元,固定成本总额为16万元,则该产品的边际贡献率为()。
编制预计资产负债表时,可以直接从现金预算中直接获得的数据是()。
《游峨眉山记》的作者是(),他的诗与尤袤、杨万里、陆游齐名,号称南宋四大家。
下列报告文学中()是散文作家、诗人、小说家魏巍的作品。
从埃及石像上的刻字到泰国白庙的洗手间,中国游客的素质一直是个十分敏感且每每在网络上引起广泛关注的话题。随着舆论的_______,国家旅游局不得不出台游客“黑名单”,以杜绝游客的不文明行为,久而久之,似乎每一个中国游客也都默认了“素质低”这_______。填
Everyhumanbeing,【C1】______whatheisdoing,givesoffbodyheat.Theusualproblemis【C2】______disposeofit.Butthedesigner
最新回复
(
0
)