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
2025-03-05
33
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. In his eagerness to make money from trees, he has cut them down inlarge 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 ran falls on hard ground and flows away, causing floods and canying 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 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://tihaiku.com/zcyy/3983858.html
相关试题推荐
互联网在我们生活中变得越来越重要了。TheInternethasbecomemoreandmoreimportantinourlife.
Teddy:Gravityisveryimportant.Bob:Whatdoyoumean?Teddy:Gravityisthef
Teddy:Gravityisveryimportant.Bob:Whatdoyoumean?Teddy:Gravityisthef
Inancienttimesthemostimportantexaminationswerespoken,notwritten.I
Inancienttimesthemostimportantexaminationswerespoken,notwritten.I
Inthedeadman’sbedroomthepolicefoundseveralimportant______whichpointed
Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityof
Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityof
Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityof
Thisisanicecar,butwecannot______it.A、provideB、affordC、supplyD、manageB本
随机试题
•Youwillhearthreetelephoneconversationsormessages.•Writeoneortwowo
SUNDAYIAFUNDAYFORMODERNBRITSInanewstudy,EssexU
[originaltext]M:LookatthelowpricesonthesefashionableTVsets.Something
Oneofthebestpiecesofmedicalnewstoemergeoverthelastseveralyears
WhathasmadeJohnsosurprised?[originaltext]M:Hello.Isthistheregistratio
粮储公司购入500吨小麦,价格为1300元/吨,为避免价格风险,该公司以1330元/吨价格在郑州小麦3个月后交割的期货合约上做卖出套期保值并成交。2个月后,
[originaltext]ThefirstrealityTVshowintheworldwascalledExpedition
《宪法》序言中规定,国家的根本任务是,沿着中国特色社会主义道路()A.加快实现“
患者女,40岁,行胆总管切开取石T管引流术后5天,T管引流液每天2000mL,提
患者男性,56岁。体检发现心尖部舒张期隆隆样杂音;胸片提示左房、右室增大,诊断为
最新回复
(
0
)