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
2024-01-18
72
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 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. [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/3372483.html
相关试题推荐
Themostimportantthingtodo______thepollutionassoonaspossible.A、aregot
Argumentsmayconcernsuchunimportantmattersasstylesofdressorhairdos.(P
It’simportanttolocateindustriesinareaswhereasupplyofrawmaterialsis
(Let’snot)wastelimeon(mattersofnoimportant).Wehaveother(vital)probl
Adviceshouldbeprovidedfreeto______needsit.A、whomB、whoeverC、whoD、nomatt
Itwasfoolishofhimto______hisnotesduringthatimportanttest;now,hegot
Weoftenprovideourchildrenwithtoys,footballsorbasketballs,______thatal
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
随机试题
PriceTermsImportantPriceInformationUnlessotherwiseexpresslynoted,allpr
Exactlywhatapublicforestisandhowthepublicshouldbeabletouseit
A、WenttoTomforadvice.B、Askthewomantofindajobforhim.C、Trytoapply
美术绘画活动:《海底世界》
某混凝土试块强度值不满足规范要求,但经法定检测单位对混凝土实体强度经过法定检测后
基层群众性自治组织:是指我国依照宪法和法律有关规定,以城乡居民或村民一定居住地
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
在()的情况下,企业雇用员工的成本会降低。 A.劳动力需求大于供给
县级以上财政部门做出吊销资格证书、对单位处5万元以上罚款、对个人处3万元以上罚款
下列定向方法中,属于物理定向的是()。A.通过一个立井的几何定向 B.通过两
最新回复
(
0
)