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、The increase in beachfront property value. B、An experimental engineering project. C、The erosion of coastal areas D、How to buil
A、The increase in beachfront property value. B、An experimental engineering project. C、The erosion of coastal areas D、How to buil
admin
2018-11-19
113
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、The increase in beachfront property value.
B、An experimental engineering project.
C、The erosion of coastal areas
D、How to build seawalls.
答案
C
解析
主旨题。根据…the topic that should be of real concern to civil engineers:the erosion of the US beaches.可知主要讨论的是美国沙滩的侵蚀问题。因此,正确答案为C。
转载请注明原文地址:https://kaotiyun.com/show/xuH7777K
0
大学英语六级
相关试题推荐
A、Toshowtherelationshipbetweenfearfulnessandenvironment.B、Togiveexamplesofanimalsthattheyaren’tfearful.C、Toco
A、Bothofthemcanspiceone’slife.B、Neitherofthemismeaningful.C、They’rebothjustwaystoescapefromreallife.D、They
TheDodgeBrothersA)Itwas100yearsagothisweekthattheDodgebrothersfoundedthepowerfulcarbrandthatstillbearsthei
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsurvivalintheopen.Theyhadneitherthepowerfult
A、Chewinggums.B、Earphones.C、Magazines.D、Seatbelts.C信息明示题。文章指出,Afewminutesaftertake—off,magazinesandnewspaperswerep
Thenewyearalwaysbringswithitaculturaltraditionofnewpossibilities.Weseeitasachancefor【B1】______.Webegintod
ShoppricesinJunefellatthefastest【C1】______ratesinceatleast2006as【C2】______foughttoattractcustomers,theBritishR
A、Itisbasedontheinterviewswithpopularsingers.B、Itistointroducesomefamoussongwriters.C、Ithelpstounderstandthe
A、Harmtosingersdonebysmokyatmospheres.B、Sideeffectsofsomecommondrugs.C、Voiceproblemsamongpopsingers.D、Hardship
随机试题
甲矿业有限公司成立于2004.年12月29日,经营范围为铁矿石开采、加工销售,注册资金200万元,公司类型为有限责任公司,法人代表周某。2005年1月28日,甲矿业有限公司取得省国土资源厅颁发的采矿许可证,有效期至2010年1月29日,到期后进行了延期换证
培养箱的使用与维护应注意的是
在人本主义治疗中最重要的是
A.20(R)一原人参三醇B.20(R)一原人参二醇C.20(S)一原人参二醇D.20(S)一原人参三醇E.人参二醇B型人参皂苷的真正皂苷元属于
工程测量包括控制网测量和施工过程控制测量两部分内容。它们之间的相互关系是:(),两者的目标都是为了保证工程质量。
某高层宾馆按照制定的消防应急预案,组织进行灭火和应急疏散演练。下列程序中,正确的有()。
甲国际旅行社组织30名旅游者赴泰国旅游,由于境外接待社的过失,使旅游者权益遭受严重侵害。根据《旅行社条例》规定,旅游者应该向()索赔。
(2012年邮政系统)实验设计来源于理论预设或工作假说,例如现代宇宙学提出的“暗物质”是一种不发光而只有引力效应的物质,它是作为“拯救”暴涨宇宙论的辅助假说,并川来说明银河系自转而提出来的。有了这种从理论_______出来的暗物质假说,然后才能有确证它的_
设α=(1,一1,2)T,β=(2,1,1)T,A=αβT,则An=____________.
[*]
最新回复
(
0
)