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
A、By sending water directly back to sea with great force. B、By reducing wave energy. C、By reducing beach width. D、By stabilizing
A、By sending water directly back to sea with great force. B、By reducing wave energy. C、By reducing beach width. D、By stabilizing
admin
2018-11-19
36
问题
Your professor has asked me to talk to you today about the topic that should be of real concern to civil engineers: the erosion of the US beaches. Let me start with some statistics. Did you know that 90% of the coast in this country is eroding, on the gulf of Mexico for instance, erosion averages 4 to 5 feet per year. Over the past 20 years, there has been an increase in building along the coast, even though geologists and environmentalists have been warning communities about problems like erosion. Some way communities have tried to protect their building and roads and to build seawalls. However geologists have found that such stabilizing structures actually speed up to the destruction of the beaches. These beaches with seawalls, called stabilized beaches, are much narrower than beaches without them. U may wonder how seawalls speed up beach loss. The explanation is simple. If the flow of the beaches is gentle, the water energy is lessened as it washes up along the shore. It is reduced even more that returns to the sea so it doesn ’t carry back much sand. On the other hand, when the water hit the nearly vertical face of the seawall, it goes straight back to the sea with the full force of its energy and it carries back a great deal of sand. Because of the real risk of losing beaches, many geologists support a ban on all types of stabilizing construction on the shore lines.
Now listen to the following recording and answer questions 22 to 25.
22. What is the speaker mainly discussing?
23. Why do communities build seawalls?
24. How does a gently sloping beach help prevent erosion?
25. What would the speaker probably advise engineers to do?
选项
A、By sending water directly back to sea with great force.
B、By reducing wave energy.
C、By reducing beach width.
D、By stabilizing beachfront construction.
答案
B
解析
细节题。根据If the flow of the beaches is gentle,the water energy is lessened as it washes up along the shore.可知稍微倾斜的海滩能减少水能,以此来防止侵蚀。因此,正确答案为B。
转载请注明原文地址:https://kaotiyun.com/show/JuH7777K
0
大学英语六级
相关试题推荐
A、Twenty.B、Twenty-four.C、Twenty-six.D、Twenty-eight.C推断题。根据文中提到的ThestudybytheUniversityofOxfordandtheLondonSchoolo
A、Rememberingworddefinitions.B、Recognizingrepeatednumbers.C、Distinguishingbetweensimilarcolors.D、Tastingsounds.D细节题。
A、Youcanunderstandmoreaboutyourplaceinthesociety.B、Youcanknowmoreaboutyourself.C、Youcananticipatemoreexcitem
A、Youcanunderstandmoreaboutyourplaceinthesociety.B、Youcanknowmoreaboutyourself.C、Youcananticipatemoreexcitem
A、Heislucky.B、Hedoesn’tknowmuchaboutbusiness.C、Heisagoodbusinessman.D、Heshouldn’thavemovedtoAustralia.C细节题
A、WhyAmericanindustriesgrewrapidlyinthenineteenthcentury.B、HowadvancesintransportationhelpedAmericancitiesdevelo
TheDodgeBrothersA)Itwas100yearsagothisweekthattheDodgebrothersfoundedthepowerfulcarbrandthatstillbearsthei
A、Theywilllivelonger.B、Theygetbetterpay.C、Theygetalongwellwithpeople.D、TheydevelopmuchhigherIQs.B由“Andthena
ShoppricesinJunefellatthefastest【C1】______ratesinceatleast2006as【C2】______foughttoattractcustomers,theBritishR
随机试题
下列关于项目评估方法的表述中,正确的有()。
庆大霉素不能与呋塞米合用的主要原因是两药合用后
属糖酵解途径关键酶的是
(司法试题)绿杨公司因严重资不抵债向法院申请破产,法院已经受理其申请。根据《破产法》的规定,在法院已经受理破产申请、尚未宣告绿杨公司破产之时,下列哪一项财产不构成债务人财产?()
现行宪法规定,自治区的自治条例和单行条例的审批权属于()。
负荷计算中描述错误的是()。
明敷的电缆不宜平行敷设于热力管道上部。当必须平行热力管道敷设,且电缆与热力管道之间无隔板防护时,其间距应为500mm。()
社会主义教育科学文化建设要解决的是
数据库系统其内部分为三级模式,即概念模式、内模式和外模式。其中,______是用户的数据视图,也就是用户所见到的数据模式。
Humanity’sprimaleffortstosystematizetheconceptsofsize,shapes,andnumberareusuallyregardedastheearliestmathemati
最新回复
(
0
)