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
考研
Homeland security is a strange beast. Governments will happily spend billions of dollars fighting foreign wars and making the li
Homeland security is a strange beast. Governments will happily spend billions of dollars fighting foreign wars and making the li
admin
2016-03-21
74
问题
Homeland security is a strange beast. Governments will happily spend billions of dollars fighting foreign wars and making the lives of travellers miserable with layer upon layer of security at airports. Yet, as Britain’s farmers have recently discovered, those same governments will also happily squeeze basic flood defence. What, it is worth considering, might be done if military-sized budgets were to be deployed against natural, as well as human threats?
If an odd couple of trillion dollars were hanging around in some Treasury official’s back pocket, Mark Jacobson of Stanford University has a suggestion about how to spend them. He would use them to build a specially designed wind farm off the coast of Louisiana, to protect New Orleans and its neighbours from hurricanes. Katrina, after all, killed 1,833 people. That is more than 60% of the number who died in the attacks of September 11th 2001. More trillions would bring more defence: all along the Gulf and Atlantic coasts, if required.
Dr. Jacobson’s calculations, which he describes in Nature Climate Change, depend on a clear understanding of how hurricanes work. Turbines would steal energy from them, of course, which would make them somewhat less destructive. But that would not be enough to have a big effect. However, by extracting this energy from the winds in a storm’s leading edge, serried rows of turbines hundreds of kilometres long would also calm the water over which the hurricane’s eye—its driving force—subsequently passed.
This turns out to be crucial. Rough water feeds a hurricane, paradoxically, by creating friction between air and sea which slows down the winds circulating around the storm’s eye. This lets the air in those winds ascend the eyewall more easily, rather than just going around in circles. It is this ascent, which sucks yet more air into the cyclone, that powers the storm.
Calming the waters before a hurricane with windmills could thus, according to Dr. Jacobson’s calculations, lower its maximum wind speed by 50- 80%. It would also reduce the amount of water surging onto the land, which is the principal cause of destruction, by as much as 80%. A beast so tamed would do far less harm. And, as a bonus, when the turbines were not calming hurricanes, they could pay part of their way by generating electricity.
In the first paragraph, homeland security is mentioned to______.
选项
A、serve as the topic of this text
B、discuss the importance of budget
C、make comparison with flood defence
D、introduce the discussion of natural threats
答案
D
解析
根据题干定位到第一段。文章第一句提到homeland security“国土安全”一词,但是从第二段开始就没有再讨论这个词,而是转而提到其他,故[A]项的serve as the topic ofthis text“作为这篇文章的主题”是错误的。而[B]项的budget“预算”和[C]项的flood de-fence“防洪”只是一个细节信息,也不是文章提到homeland security的目的。由于文章后面四段都在讨论关于飓风的问题,即natural threat“自然危害”,故文章提及homeland security的目的是为了“引出关于自然危害(飓风)的讨论”,即本题答案为[D]。
转载请注明原文地址:https://kaotiyun.com/show/jYsZ777K
0
考研英语一
相关试题推荐
Inadisastersuchasanearthquakeorterroristattack,nearlytwo-thirdsofU.S.parentswoulddisregardorderstoevacuatea
ThemediamadeabigdealofthefactthattheDJIAroseabove9,000forthefirsttimeinnearlyeightmonths.Theindex(anumb
Inthelastfewweeks,ahandfuloftopbusinessschoolshavereportedsingle-digit,andinsomecasesdouble-digit,declinesin
Forinvestorswonderingwhethertheyshoulddumptheirstocksbecausetheyneedthemoney,Ihaveonlythistosay:Ifyouneed
Newspapersarebecomingmorebalancedbusinesses,withahealthiermixofrevenuesfromreadersandadvertisers.Americanpapers
AstheSenatepreparestovoteonlegislationtoempowertheFoodandDrugAdministrationtoregulatetobaccoproducts,itsmemb
WhenrecruitingatBritishuniversities,PricewaterhouseCoopers,oneoftheBigFourauditingfirmswithitsheadquartersinthe
LatinoyouthsneedbettereducationforArizonatotakefulladvantageofthepossibilitiestheirexplodingpopulationoffers.A
ItishardtopinpointthedateatwhichAmericansdevelopedanIndian—orperhapsBritishfatalismaboutthedecliningqualityo
随机试题
阅读雪莱的《云》,谈谈它在写作手法上与《西风颂》有何相似之处。我为焦渴的鲜花,从河川,从海洋,带来清新的甘霖;我为绿叶披上淡淡的凉荫,当他们歇息在午睡的梦境。从我的翅膀上摇落下露珠,去唤醒每一朵香甜的蓓蕾,当她们的母亲绕太阳旋舞时摇晃着①使
脑出血患者出现下列哪些情况提示有脑疝的可能
关于缓、控释制剂的特点错误的是()
自动控制系统种类很多,按系统的反应特性可分为()。
发包人和承包人在合同中约定垫资但没有约定垫资利息,后双方因垫资返还发生纠纷诉至法院。关于该垫资的说法,正确的是()。
公司、企业必须按照国家统一的会计制度的规定确认、计量和记录资产、负债、所有者权益以及()。
某公司拟进行股票投资,计划购买甲、乙、丙三种股票组成投资组合,已知三种股票的β系数分别为1.5、1.0和0.5,该投资组合甲、乙、丙三种股票的投资比重分别为50%、20%和30%,全市场组合的预期收益率为9%,无风险收益率为4%。根据以上资料,回答下列问
“物有甘苦,尝之者识。”下列名言警句中与其哲理相近的是:
简述伪满“新学制”。
设函数u=f(r),而r==0,试求函数u.
最新回复
(
0
)