首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
On a rainy day, you will see many streams of muddy(多泥的)water running down the slopes(斜坡)of a hill. The water is muddy because it
On a rainy day, you will see many streams of muddy(多泥的)water running down the slopes(斜坡)of a hill. The water is muddy because it
admin
2015-10-30
15
问题
On a rainy day, you will see many streams of muddy(多泥的)water running down the slopes(斜坡)of a hill. The water is muddy because it washes away soil from the hill slopes.
Sometimes soil is blown away by strong winds. When the soil is carried away by water or wind, we say that the land is eroded(侵蚀). This is known as soil erosion.
Plants cannot grow on eroded land. There is not enough soil on eroded land to give them the things they need. Plants need water and salts from the soil.
We can do a number of things to stop soil erosion. This is called soil conservation(保护).
One way of soil conservation on flat, open ground is to grow small plants such as grasses. Their roots hold the soil tightly together.
Another way is to plant trees around an open field. Thus soil erosion by strong winds cannot take place. Rows of trees act as a very big wall.
Soil erosion on slopes can be stopped by cutting "steps" called terraces(梯田). Water carrying soil cannot run straight down the slope now. It has to run down the terraces. This slows down the flow(流速)of the water. Most of the soil in the water is left behind on the terraces.
There are some other ways for soil conservation.
Cutting "steps" called terraces on slopes______.
选项
A、can slow down the flow of the water
B、helps plants grow better
C、prevents the soil being carried away by winds
D、makes the plants’ roots hold the soil together
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/wfYC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsoundslikethosemadebyanimals.Perhapshegruntedlik
OnthemorningofNovember18,1735,anearthquakeshookBoston,Massachusetts.JohnWinthrop,aprofessoratHarvardCollege,fe
It’sreallykind______.
ArchimedeswasafamousGreekmathematicianandscientist.Hewasbornaround287BCandhediedintheyear212BC.Archime
ItisoftendifficultforvisitorstounderstandAmericans’lackofdesireforprivacy.Theyarenotanationofwalledgardens
Notallpeoplegottheirnames【21】theirfathers.Somegottheirnamesfromtheplacesthey【22】.Forexample,afamilyhadlived
Notallpeoplegottheirnames【21】theirfathers.Somegottheirnamesfromtheplacesthey【22】.Forexample,afamilyhadlived
Ontheanniversaryoftheartist’sbirth,VanGogh’sSunflowerswas【21】forjustunder£25millionatthefineartauctioneers(拍
Sportshavealwaysbeenruledbytheweather.Rain,sleet,snowandcoldcalledtheplays.Baseballfanshaveoftensatinther
Theappealoftheworldofworkisfirstitsfreedom.Thechildiscompelledtogotoschool:heis【21】ofauthority.Ashegrows
随机试题
集成电路按功能可分为数字集成电路和_______集成电路。
湿邪的性质和致病特点之一是燥邪的性质和致病特点之一是
阿托品对有机磷农药中毒症状没有疗效的是
清肺止咳,降逆止呕润肺下气,止咳化痰
在工程实施过程中,实际情况与计划产生偏差的绝对性,主要表现为( )。
下图表示某水域生态系统的食物网,下列分析正确的是()。
下列各项中,对应正确的有:
五因素模型(大五人格理论)是当代重要的人格理论,请回答下列问题:(2015年)下图是一项关于五因素模型的纵向研究结果。试分析该图并据此说明人格的稳定性与可变性。
当今国际储备资产总额中所占比重最大的是()。
下列关于汉字信息处理的叙述中,不正确的是( )。
最新回复
(
0
)