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、Protecting roads along the shore. B、Building on beaches with seawalls. C、Adding sand to beaches with seawalls. D、Stopping buil
A、Protecting roads along the shore. B、Building on beaches with seawalls. C、Adding sand to beaches with seawalls. D、Stopping buil
admin
2009-04-23
27
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. Someway, communities have tried to protect their buildings and roads and to build seawalls.
However, geologists have found that such stabilizing structures actually speed up the destruction of the beaches. These beaches with seawalls, called stabilized beaches, are much narrower than beaches without them. You 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 hits 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 shorelines.
选项
A、Protecting roads along the shore.
B、Building on beaches with seawalls.
C、Adding sand to beaches with seawalls.
D、Stopping building seawalls.
答案
D
解析
What do the geologists advise people to do?
转载请注明原文地址:https://kaotiyun.com/show/brZK777K
0
大学英语六级
相关试题推荐
Ifyouarenow______,youneedtodomoreexercisestobuildyourbody.
Scientistsfindthathard-workingpeoplelivemuchlongerthanaveragemenandwomen.Careerwomenarehealthierthanhousewives
A、Inahotel.B、Inabookstore.C、Inagrocery.D、Inalibrary.A解答地点场所题时要综合分析对话中提到的细节。根据女士提到的Ihavealreadybookedadoubleroo
A—socialisteconomyL—privatesectorB—capitalisteconomyM—publicsectorC—collectiveeconomyN—economicchannelsD—plannedeco
A、Takinglongbusinesstrips.B、Workingonweekends.C、Havingworkexperience.D、livinginthecompany’sdormitory.B题目询问这份工作的特殊
A、Toworkinanoffice.B、Tobeasalesman.C、Togoabroad.D、Tobeananimaldoctor.D问题询问的是男士想找什么工作。男士说在对话中说他想当兽医(vet),并解释了兽医是
A、Havingamealinarestaurant.B、Checkinginatahotel.C、Bookingaticketatastation.D、Reservingaseatinacinema.B本题询
A—StockexchangeK—StocktransferB—BuyingandsellingstockL—StockcompanyC—StockmarketM—SharecapitalD—Currentprices
OurpricescomparefavorablywiththoseofferedbyothermanufacturerseitherinEuropeoranywhereelse.
Howdopeopleoftenmeasureprogressinagriculture?Whatdoestheauthorthinkoftraditionalfarmingpractices?
随机试题
当检验固定式龙门铣床铣头水平移动(Y轴线)的直线度时,首先应将横梁固定在行程两端的一端,使工作台也位于其行程的一端。()
什么是双片摩擦式离合器?有什么特点?
依据我国民法的有关规定,所有人不明的埋藏物、隐藏物应归下列选项中谁所有()
木通的药用部位是
()是指在投产运营前要组织专门人员对产品市场进行调查,认真分析市场形势,研究市场现状与项目可行性研究发生的变化,分析国内对本项目产品的竞争情况及其发展趋势。
下列各项中,关于企业以自产产品作为福利发放给职工的会计处理表述不正确的是()。
Soft-drinksaleshavebeendecliningforninestraightyears.Thisismuchmorethanatrend—it’safundamentalshiftinconsum
标准ASCII码字符集总共的编码有______个。
WheneverIhearaweatherreportdeclaringit’sthehottestJune10onrecordorwhatever,Ican’ttakeittooseriously,becaus
Asusedinthefirstparagraphofthepassage,theword"motivate"mostprobablymeans______."Abuyerwillgetsomethingfor
最新回复
(
0
)