首页
登录
职称英语
[originaltext] Your professor has asked me to talk to you today about the to
[originaltext] Your professor has asked me to talk to you today about the to
游客
2023-09-17
11
管理
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://tihaiku.com/zcyy/3021164.html
相关试题推荐
[originaltext]M:So,Rebecca,whatdidyoudoforspringbreak?W:Iwenttoso
[originaltext]M:So,Rebecca,whatdidyoudoforspringbreak?W:Iwenttoso
[originaltext]M:So,Rebecca,whatdidyoudoforspringbreak?W:Iwenttoso
[originaltext]M:Hi,Helen.Howdidyourdrivingtestgo?Didyougetyourdriv
[originaltext]M:Hi,Helen.Howdidyourdrivingtestgo?Didyougetyourdriv
[originaltext]InBritain,arrangementsforinvitingandentertainingguests
[originaltext]Stressisaverynormalpartoflife.Mostpeoplefeelstress
[originaltext]Stressisaverynormalpartoflife.Mostpeoplefeelstress
[originaltext]Stressisaverynormalpartoflife.Mostpeoplefeelstress
[originaltext]W:Hello,I’mJennyJohnson.Howareyouthismorning?M:Hello!
随机试题
Fears,ingeneral,keepusfromreachingourfullpotential.Fearofsuccess
石灰、粉煤灰稳定砂砾基层,粉煤灰原材中的SiO2、A12O3和Fe2O3总量宜大
国家统计局公布的全国粮食生产数据显示,2018年全国粮食播种面积175555万亩
2014年前9个月江苏钢材产量稳步增长。其中1~2月产量为1932万吨,累计同比
合同对合同当事人具有()约束,当事人必须依照约定履行自己的义务,不得擅自变更
共用题干"Muchofthesicknessanddeat
“君子博学而日参省乎己,则知明而行无过矣”,荀子这句话体现的德育方法是()。
主要用于控制远期复发的抗疟药是A.奎宁 B.周效磺胺 C.伯氨喹 D.青蒿
我国政府预算改革的目标是逐步建立起全口径预算体系,包括()。A.公共预算
重度主动脉瓣狭窄,听诊不会出现A.收缩期杂音持续时间长 B.无收缩早期喷射音
最新回复
(
0
)