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 he
Trees are useful to man in three important ways: they provide him with wood and other products; they give him shade; and they he
admin
2014-03-13
48
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.
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/m4DO777K
0
成人本科学位英语
相关试题推荐
Everyoneknowsthattaxationisnecessaryinamodernstate.Withoutit,itwouldbeimpossibletopaythesoldiersandpoliceme
Everyoneknowsthattaxationisnecessaryinamodernstate.Withoutit,itwouldbeimpossibletopaythesoldiersandpoliceme
SpeakerA:I’mgettingabsolutelynowherewiththesephysicsproblems.SpeakerB:______
Theballwasprobablyinventedbecause______.TheancientEgyptianswerethefirst______.
Fromtheverybeginning,theauthorputsitclearlythatactingisaprofession______.ThefilmproducerfoundConniePratton
Treesareusefultomaninthreeveryimportantways:theyprovidehimwoodandotherproducts;theygivehimshade;andtheyh
我本来打算今天给你这本书的,可是我忘了。
Parentsshouldstopblamingthemselvesbecausethere’snotalottheycandoaboutit.Imeantheteenager(十几岁的孩子)problem.Wha
你知道今天报上有一篇重要的文章吗?
你知道今天报上有一篇重要的文章吗?
随机试题
A.舌色红活鲜明B.舌色青紫或舌下络脉怒张C.舌苔厚腻D.舌体震颤或歪斜E.舌生疮疡、红肿热痛或吐舌、弄舌
某钢铁企业进行技术改造和更新关键设备,现市场上有A、B、C三种设备均可以满足技改要求。企业为选择A、B、C中的一种作为技改设备,特采用了综合评分法,并就设备的经济性、先进性、环保性三个评价因素设定了权重,分别为0.5、0.3、0.2,具体评分结果见下表。
下列哪些情况宜应用洋地黄治疗
知信行理论(KABP)中,B代表
A.注意力缺陷多动症B.脑性瘫痪C.化脓性脑膜炎D.病毒性脑炎E.癫痫具有发热、呕吐、脑膜刺激征阳性、进行性休克表现的疾病是
下列()情况出现时,会计软件当期不能结账。
我国目前普遍采用的课堂教学的基本组织形式是()。
①每年春天,迎春花首先开出黄色的小花,报告春的消息②夜来香的香气熏透了整个夏夜的庭院,是我什么时候也不会忘记的③以后接着来的是桃花、杏花、海棠、榆叶梅、丁香等等,院子里开得花团锦簇④我们家里一向是喜欢花的:虽然没有什么非常名贵的花,但是常见的花却是应
承久之乱
Thedifferencesbetweenmenandwomen(1)_____whytheyhavedifferentexpectationsaboutcommunicationinmarriage.Forwomen,
最新回复
(
0
)