首页
登录
职称英语
[originaltext] The ordinary raindrop is a mighty earthmover with sufficient
[originaltext] The ordinary raindrop is a mighty earthmover with sufficient
游客
2023-09-12
14
管理
问题
The ordinary raindrop is a mighty earthmover with sufficient strength to cut rock. When rainwater collects on the surface of the ground, some of it evaporates and some of it sinks into the earth. The remainder begins to flow downhill, commencing its lengthy journey from brook to stream to lake, or to a river that will carry it to the sea.
As water flows along the ground, it picks up sand, pebbles, even boulders. It uses them to gnaw at the sides and bottoms of its channel, gradually loosening more earth.
By this process enormous amounts of mud and rock are moved from the land to the sea. Each year the Mississippi River carries 730 million tons of solid matter into the Gulf of Mexico.
This constant hauling of land into the sea is lowering the United States’ average height above sea level at a rate of about one foot every 9,000 years. If erosion continues at the same rate, the United States will be worn completely down to sea level in about 23 million years.
What does erosion by water result in?
选项
A、It is being raised each year.
B、It remains constant.
C、It will reach sea level in 9,000 years.
D、It is being lowered gradually.
答案
D
解析
细节辨别题 文中讲到美国的平均海拔高度在以每9000年一英尺的速度下降。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3008442.html
相关试题推荐
[originaltext]The22ndofNovember1970isadaythatthreeBritishsoldier
[originaltext]Amanoncesaidhowuselessitwastoputadvertisementsint
[originaltext]TheOlympicGamesoriginatedin776B.C.inOlympia,asmall
[originaltext]TheOlympicGamesoriginatedin776B.C.inOlympia,asmall
[originaltext]M:Hi,Cathy.IamherebecauseIvisitedcavesalloverNorthAm
[originaltext]M:Hi,Cathy.IamherebecauseIvisitedcavesalloverNorthAm
[originaltext]M:Excuseme,Prof.Thomson.Iknowyourofficehoursaretomorro
[originaltext]M:Excuseme,Prof.Thomson.Iknowyourofficehoursaretomorro
[originaltext]Throughtheyearsofbeinganadvisorattheuniversity,I’ve
[originaltext]Throughtheyearsofbeinganadvisorattheuniversity,I’ve
随机试题
以后,您可以歇一歇了!Fromnowon,youcanleadalifeofleisure.根据语境,此处“歇一歇”并非实指rest,而是指过悠
[originaltext]M:RuthPetersisachildpsychologist,hey,Ruth,goodmorning.
Whydopeopleleavehometotravelaccordingtothepassage?[br][originaltext
在中国,以下哪些因素较小影响开发利益?()A.市政条件 B.规划设计条件
患者,男,40岁。因发热1天入院。查体:体温38.5°C,纳差、精神差,对患者的
下列关于利息的表述中,错误的是()。A.利息是剩余产品价值的一部分 B.利
某房地产开发公司被法院宣告破产。就该破产企业清偿顺序问题,下列哪些说法是正确的?
商业银行资本的核心功能是()。A.扩大业务范围 B.提高银行的市场竞争力
设计施工总承包合同履行过程中,承包人应按照发包人要求,在合同进度计划中专门列出设
下列何药可治疗尿崩症A.氢氯噻嗪 B.乙酰唑胺 C.呋塞米 D.螺内酯
最新回复
(
0
)