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
34
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 do forests in many parts of the world slowly disappear?
选项
A、New trees are not looked after properly.
B、Many trees have been cut down by man.
C、Man has not paid enough attention to planting trees.
D、All of the above.
答案
D
解析
事实细节题。第二段说明了森林逐渐减少的原因,可知D正确。
转载请注明原文地址:https://kaotiyun.com/show/Q4DO777K
0
成人本科学位英语
相关试题推荐
Theairispolluted.Theearthispoisoned.Waterisunsafetodrinkandrubbishisburyingthecivilizationthatproducedit.
TheCrazefortheGraduateStudyForthispart,youareallowedthirtyminutestowriteacompositionofnolessthan120wo
Alanguageisasignalingsystemwhichoperateswithsymbolicvocalsounds,andwhichisusedbyagroupofpeopleforthepurpo
Everyoneknowsthattaxationisnecessaryinamodernstate.Withoutit,itwouldbeimpossibletopaythesoldiersandpoliceme
Thirty-onemillionAmericansareover60yearsofage,andtwenty-ninemillionofthemarehealthy,busy,productivecitizens.B
So______istheweatherinEnglandthatbylunchtimetherecouldbethunderandlightening.
(Advertising)givesusefulinformationabout(which)(products)to(buying).
Therearemanycommunitiesandpopulationswhichhavelostpreciousrecordsduetotragiceventssuchasthefireinthecourts
Itwasnotmuchfuntotravelononeoftheoldsailingships.Lifewashardforbothpassengersandcrew.(78)17thcenturysai
随机试题
简述二战后国际政治格局的演变过程和阶段性特点。
简述关税同盟的动态效应的主要表现。
症见胁肋胀痛或灼热疼痛,口苦口黏,胸闷纳呆,恶心呕吐,小便黄赤,大便不爽,舌红苔黄腻,脉弦滑数,宜选用
前段时间,黑龙江省颁布《黑龙江省气候资源探测与保护条例》,规定企业探测、开发风能及太阳能资源必须经过气象部门批准,而且探测出来的资源属国家所有。把风能和太阳能说成是“国家所有”根本就是一个笑话。自然赋予人类的这种资源,实际上是用来让整个社会分享的,不能,也
中世纪最典型的教会教育机构是()。
设随机变量X的概率密度为F(x)是X的分布函数,求随机变量Y=F(X)的分布函数.
(63)不是网络操作系统的系统模型。只能用于构造简单的对等式网络的操作系统是(64)。典型的集中式网络操作系统是(65)。
使用VC6打开考生文件夹下的源程序文件modi3.cpp。其中定义的类并不完整,按要求完成下列操作,将类的定义补充完整。完成以下功能:(1)类CBase有一个常数变量Number1,在构造函数时对其初始化,请在注释//********1********后
图书馆的学习环境好。
Somehousesaredesignedtobesmart.Othershavesmartdesigns.AnexampleofthesecondtypeofhousewonanAwardofExcellen
最新回复
(
0
)