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
93
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、Thedepressingcoldweather.B、Thebadeconomicsituation.C、Unhealthydiet.D、Drugsandalcohol.B细节题。根据文中提到的Theeconomiccri
A、Consistentlyassociatewordswithcertaincolors.B、Memorizelonglistsofwords.C、Usecoloredprintingtolearnpronunciatio
NewDiscoveriesofPublicTransportA)AnewstudyconductedfortheWorldBankbyMurdochUniversity’sInstituteforScienceand
A、Encouragement.B、Agreement.C、Apause.D、Aninterruption.D推断题。文章主要介绍了西方人的交流,无论赞同还是反对,主要是观点的交流,由此可知他们交流时最可能发生的是打断对方的发言,即interr
A、Heislucky.B、Hedoesn’tknowmuchaboutbusiness.C、Heisagoodbusinessman.D、Heshouldn’thavemovedtoAustralia.C细节题
Baby-NamingTrendsA)Overthelastfiftyyears,Americanparentshaveradicallyincreasedthevarietyofnamestheygivetheirc
AnimalsontheMoveA)Itlookedlikeascenefrom"Jaws"butwithoutthedramaticmusic.Ahugesharkwasslowlyswimmingthrou
Occasionalself-medicationhasalwaysbeenpartofnormalliving.Themakingandsellingofdrugshavealonghistoryandarecl
A、Verynormalinthe21stcentury.B、Absolutelycorrectforever.C、Profoundlywrongfornow.D、Ratherabsurdinthe19thcentury
A、Toplaytheviolinonceagain.B、TogototheUnitedStates.C、Toapplyforascholarship.D、Tohaveherperformancetaped.D根
随机试题
把图像(或声音)数据中超过人眼(耳)辨认能力的细节去掉的数据压缩方法属于_______方法。
窝沟龋中最多的致龋菌为
二陈汤主治之咳嗽属于
A.退现性不良反应B.A类不良反应C.B类不良反应D.新的药品不良反应E.药品不良反应
港口与航道工程中,影响挖泥船时间利用率因素的说法,错误的是()。
关于代位权的行使,如果原债务人的债务人向原债务人履行债务,原债务人拒绝受领时,则债权人有权代原债务人受领。但在接受之后,应当 将该财产( )。
1975年()开展房地产抵押券的期货交易,标志着金融期货交易的开始。
跳水运动员在跳水比赛过程中营救了落水人。但是比赛成绩仍然以开始的跳水成绩计算。只给了一个平均成绩。对于这个问题你怎么看?
有人再三声称倾倒核废物不会对附近的居民生命造成威胁。如果这种说法正确,那么不能把核垃圾场设在人口密集的地区就显得毫无道理。但是要把这些核废物倒在人口稀少的地区的方针表明,这项政策的负责者们至少在安全方面还是有些担忧的。下面哪一个如果正确,能最严重地削弱上述
党的十九大报告指出,实现“两个一百年”奋斗目标、实现中华民族伟大复兴的战略支撑是()
最新回复
(
0
)