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
34
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、Wearing down the soil.
B、Building up land.
C、Enriching the soil.
D、Loosening more earth.
答案
D
解析
细节推断题 从文章的分析可以判断水的腐蚀可以使陆地的结构变得松散。
转载请注明原文地址:https://tihaiku.com/zcyy/3008441.html
相关试题推荐
[originaltext]The22ndofNovember1970isadaythatthreeBritishsoldier
[originaltext]Amanoncesaidhowuselessitwastoputadvertisementsint
[originaltext]TheOlympicGamesoriginatedin776B.C.inOlympia,asmall
[originaltext]M:Hi,Cathy.IamherebecauseIvisitedcavesalloverNorthAm
[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
平面图所示的两个建筑从上至下分别是( )。 A.赖特设计的流水别墅和密斯·范
A. B. C. D.
央行采取降低准备金率政策,其政策效应是( )。A.商业银行体系创造派生存款的能
用分段沉淀法分离三萜皂苷的主要依据是混合物中各组分A.极性不同B.基本骨架不同C
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
材料在自然状态下单位体积所具有的质量称为( )。A.孔隙率 B.空隙率 C
在证券市场上,投机者的投机活动是具有双重作用的活动,它有积极意义,也有消极意义,
以下属于期货价差套利种类的有( )。A.跨期套利 B.跨品种套利 C.跨市
根据折算标准的不同,汇率的标价方法可分为()。A.直接标价法 B.美元标价法
男,60岁,有慢性支气管炎病史,患肺心病10年,发现高血压5年。突然出现气急、大
最新回复
(
0
)