首页
登录
职称英语
[originaltext]Your professor has asked me to talk to you today about the topic
[originaltext]Your professor has asked me to talk to you today about the topic
游客
2023-09-03
14
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 U.S. 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 when it returns to the sea as 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.
Questions 33 to 35 are based on the passage you have just heard.
33. Why do communities build seawalls?
34. How does a gently-sloping beach help prevent erosion?
35. What do the geologists advise people to do?
选项
A、By sending water directly back to the sea with great force.
B、By reducing wave energy.
C、By reducing beach width.
D、By stabilizing beachfront construction.
答案
B
解析
选项均以“By+现在分词”开头表明,本题可能考查做某事的方式。由短文中提到的If the flow of the beaches is gentle, the water energy is lessened as it washes up along the shore可知,一个稍有斜度的海滩可以减少波浪的能量,从而有助于阻止侵蚀,故答案为[B]。
转载请注明原文地址:https://tihaiku.com/zcyy/2983253.html
相关试题推荐
[originaltext]W:We’veallheardthesaying"Laughteristhebestmedicine."Ho
[originaltext]W:We’veallheardthesaying"Laughteristhebestmedicine."Ho
[originaltext]M:Youshoulddrink8glassesofwaterperday.Itwoulddoyoumuc
[originaltext]M:Youshoulddrink8glassesofwaterperday.Itwoulddoyoumuc
[originaltext]M:Youshoulddrink8glassesofwaterperday.Itwoulddoyoumuc
[originaltext]M:Youshoulddrink8glassesofwaterperday.Itwoulddoyoumuc
[originaltext]M:Youshoulddrink8glassesofwaterperday.Itwoulddoyoumuc
[originaltext](32)Yourassignmentsthistermwillbetowritetwomajorresear
[originaltext](32)Yourassignmentsthistermwillbetowritetwomajorresear
[originaltext]EarlyintbeageofrichnessthatfollowedWorldWarⅡ,anAmerica
随机试题
[originaltext]M:Shakinganinfantoutofangerorfrustrationcanleadtoase
对于任意两事件A和B,若P(AB)=0,则( )。
最早提出“思维”和“存在”两个哲学范畴的哲学家是()。A.泰勒斯 B.毕达哥
采用钎探法进行地基验槽时,钢钎每贯人(),记录一次锤击数。A.10cm B.
患儿,男。1个月,反复呕吐1周,呕吐发生于进食后10~30分钟,呈喷射性,不含胆
图中,原植物属于十字花科的药材是 A. B. C. D. E.
某超市下午3点时对其新上架的洗发露进行半价促销。规定之后每整点时,洗发露的价格都
我国《公司法》规定,股东可以用货币出资,也可以将()等用货币估价出资,还可以依
《义务教育法》的立法宗旨包含().A.发展基础教育 B.发展职业教育 C.
对土料场的质量检查和控制中,( )的检查和控制最为重要。A.土块大小 B.杂
最新回复
(
0
)