首页
登录
职称英语
[originaltext] Your professor has asked me to talk to you today about the top
[originaltext] Your professor has asked me to talk to you today about the top
游客
2024-04-02
28
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. 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、Protect roads along the shore.
B、Build on beaches with seawalls.
C、Add sand to beaches with seawalls.
D、Stop building seawalls.
答案
D
解析
细节题。根据Because of the real risk of losing beaches,many geologists support a ban on all types of stabilizing construction on the shore lines.可知发言者可能建议工程师停止建造海堤。因此,正确答案为D。
转载请注明原文地址:https://tihaiku.com/zcyy/3537529.html
相关试题推荐
[originaltext]Listeningisoneofthefirstthingswelearntodoandoneo
[originaltext]Thankyouallforcomingtomytalkthisevening.It’snicet
[originaltext]Aslongastherehasbeencrime,therehavebeenwaystosolv
[originaltext]Aslongastherehasbeencrime,therehavebeenwaystosolv
[originaltext]DuringtheChristmasshoppingrushinLondon,aninteresting
[originaltext]DuringtheChristmasshoppingrushinLondon,aninteresting
[originaltext]Objectsthatarevibratingmakesounds.Rhythmicsoundvibrat
[originaltext]Objectsthatarevibratingmakesounds.Rhythmicsoundvibrat
[originaltext]W:Dan,didyouwanttoseeme?M:Oh,yes,Sue,pleasesitdown.
[originaltext]W:Dan,didyouwanttoseeme?M:Oh,yes,Sue,pleasesitdown.
随机试题
甲在外经商多年返回家乡,看村小学校舍破旧,就跟村委会签订赠与合同,捐款100万元
泽泻的药用部位为A.根茎 B.根及根茎 C.块根 D.块茎 E.根
下列公式中,正确的是()。A.资本金利润率=平均利税总额÷资本金×100%
制备滴丸中,错误的操作是A.主药溶解在加热熔融的基质中 B.主药混悬在加热熔融
将300克浓度95%的酒精与若干浓度60%的酒精,混合成浓度75%的酒精,需要浓
下列属于城市紫线的是()。(2017年真题)A.历史文化街区中文物保护单位
下列行为不构成违法行为的是()。A.以自制人民币换取真币 B.出售自制人民
(2018年真题)下列各项中,不应计入应付股利的有()。A.董事会通过的利润分
基层施工时,铺筑材料工地实测干密度与最大干密度之比称为()。A.厚度系数
关于干性坏疽的描述,不正确的是A.与周围组织分界清楚 B.常呈黑褐色 C.常
最新回复
(
0
)