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 important ways: they provide him with wood and other products : they give him shade: and they h
Trees are useful to man in three important ways: they provide him with wood and other products : they give him shade: and they h
admin
2016-09-28
90
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. In his eagerness to make money from trees, he has cut them down in large numbers, only to find mat 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 on 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.
Why does land become desert after all trees are cut down?
选项
A、Because nothing remains on land except floods.
B、Because there are no longer trees to keep the rain and protect the top-soil.
C、Because too much rain sinks in and washes away the top-soil.
D、Because roots of the trees break up the soil.
答案
B
解析
事实细节题。第二段最后一句话提到当顶屋土壤被冲走,就只剩下沙漠。而土被冲走是因为没有森林保存雨水,所以选B。
转载请注明原文地址:https://kaotiyun.com/show/LECO777K
0
成人本科学位英语
相关试题推荐
Musiccomesinmanyforms;mostcountrieshaveastyleoftheirown.【C1】______theturnofthecenturywhenjazzwasborn,Americ
Musiccomesinmanyforms;mostcountrieshaveastyleoftheirown.【C1】______theturnofthecenturywhenjazzwasborn,Americ
Lindaisquitedifferent_____hersisterincharacter:shelikesfriendsandgoesoutalotwhilehersisteralwaysstaysalonea
War,moneyandpowerareafewthingsthatcountriesandpeopleareconcernedabout.【C1】______Iagreethatthosethingsareimpo
Forthispart,youareallowed30minutestowriteacomposition.Youshouldwriteatleast100wordsandyoushouldbaseyourc
Forthispart,youareallowed30minutestowritealettertoaneditorofanEnglishnewspaper.Youshouldwriteatleast100
WhenIwasaboy,childrenalwaysobjected【C1】______wearingschooluniform.Butteacherswere【C2】______onitbecausetheysaida
Thefirstpapermoneylookedmorelikeanotefromonepersontoanotherthanpapermoneyusedtoday.(Passage3)
LittleJohncaughta______fishthismorning.
Hehas()thearmyfortenyearsandisnowanofficer.
随机试题
表现了“旧社会把人逼成鬼,新社会把鬼变成人”的主题的是()
十二指肠溃疡的主要治疗是
放大倍数相同,所需曝光条件最高的是
调查1998年某地正常成年男子的红细胞数,总体是1998年该地
A.药品注册商标B.药品批准文号C.《药品生产许可证》D.《药品经营许可证》E.《医疗机构制剂许可证》
企业法人分立、合并,它的权利和义务( )享有和承担。
下列属于会计职业道德教育的核心内容并贯穿始终的是()。
《消费者权益保护法》的基本原则为()。
Doctorsaretryingtofindsomethingpractical,somethingquickeryetnotnecessarilyperfect.
Tounderstandthemarketingconcept,itisonlynecessarytounderstandthedifferencebetweenmarketingandselling.Nottooma
最新回复
(
0
)