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
2015-11-16
53
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/PFRO777K
0
成人本科学位英语
相关试题推荐
Thedoctor(told)himthathe(shouldtake)thismedicine(one)pillat(one)time.
Doyouknowinsurance(保险)?Buyinginsuranceisa(56)bywhichpeoplecanprotectthemselves(57)largelosses.Protectionagain
Howcanwegetridofgarbage?Dowehaveenoughenergysourcestomeetourfutureenergyneeds?Thesearetwoimportantqu
Theplace______thebridgeissupposedtobebuiltshouldbe______thecross-rivertrafficistheheaviest.
Thedaysofelderlywomendoingnothingbutcookinghugemealsonholidaysaregone.EntertheRedHatSociety—agroupholdingt
(Let’snot)wastetimeonmatters(ofnoimportant).Wehaveother(vital)problemsto(dealwith).
______tenminutesearlier,youwouldn’thavemissedthetrain.Butyouwerelate.
Theweatherisnotascold(asyouthink.)So(Idon’tthink)theiceisthick(enough)to(walkon)it.
Somepessimisticexpertsfeelthattheautomobileisboundtofallintodisuse.Theyseeadayinthenot-too-distantfuturewhe
Burney:Thereweretwomen,Ithink.No,three.Theyranintothebankandtheonewiththegun,thetallone,herunsuptothe
随机试题
下列不属于企业道德设计原则的是()
患儿男,7.5岁。上前牙外伤2小时,要求治疗。此上前牙的特点中错误的是
下列哪种情况不会见到血清钾增高
张某出差途中突发疾病死亡,被市社会保障局认定为工伤。但张某所在单位认为依据《工伤保险条例》,只有“在工作时间和工作岗位突发疾病死亡”才属于工伤,遂诉至法院。法官认为,张某为完成单位分配任务,须经历从工作单位到达出差目的地这一过程,出差途中应视为工作时间和工
水利工程建设总监理工程师实行()管理制度。
甲公司系上市公司,属于增值税一般纳税人,适用的增值税税率为17%;适用的所得税税率为25%。除特别说明外,甲公司采用账龄分析法计提坏账准备,3个月以内账龄的应收款项计提坏账准备的比率为0。甲公司按实现的净利润的10%提取法定盈余公积。甲公司20×
关于假性痴呆的特点,下列说法中不正确的是()。
【2014年陕西咸阳.判断】在班级管理中,班主任是班级的法人。()
参加大型团体表演的学生共300名,他们面对教练站成一排,从左到右按1、2、3、4、5……依次报数,教练要求全体学生牢记各自所报的数,并做下列动作:先让报的数是3的倍数的学生向后转;接着让报的数是5的倍数的学生向后转;最后让报的数是7的倍数的学生向后转,则此
A、TheywereprotectedbyastrongUnitedStatesNavy.B、Theyweresupportedbyawell-developedrailroadC、Mostcrewmembershad
最新回复
(
0
)