首页
登录
职称英语
A serious threat to farmers in many parts of the world is erosion. Erosion o
A serious threat to farmers in many parts of the world is erosion. Erosion o
游客
2023-07-17
53
管理
问题
A serious threat to farmers in many parts of the world is erosion. Erosion occurs if a large area of land is 【B1】______ of trees and is then badly treated by the farmers. The rain and wind may 【B2】______ wash away, or blow away much of the topsoil. When this happens, 【B3】______ of wheat or corn become weaker and weaker until nothing grows well. If erosion continues, it will turn good land into a desert.
In the past when erosion 【B4】______ , farmers sometimes moved to a new place to farm. Sometimes they could not move, but continued to try to grow food in the 【B5】______ soil. This caused them to sink into 【B6】______ . Soon some people 【B7】______ that there was little rich, 【B8】______ soil in the world, so the government began to try to stop erosion.
One of the first experiments to stop erosion began in the United States in 1933. The experiment was carried out in the area of the Tennessee River. 【B9】______ As a result, most of the people living around the Tennessee River were very poor.
【B10】______ The government workers also helped farmers to fertilize their soil and to learn new farming methods which could stop erosion.
At the beginning, the farmers were not interested. But soon, good healthy crops began to appear on the land where new methods were used. 【B11】______ The great success of this experiment had led to similar projects in the other parts of the world. [br] 【B2】
选项
答案
gradually
解析
转载请注明原文地址:http://tihaiku.com/zcyy/2845748.html
相关试题推荐
Thefarmers’houses,whichlocateinthevalley,areenclosedby______andfenc
Forsuchaseriousoffencehewasluckyto______withonlyafine.A、getawayB、g
Weareworriedthattheterroristswillfollow______theirthreats______bombat
Theoilcrisisbyfar______themostseriousproblemthatthegovernmentfaced.
Theywere______hurtbyyourruderemarks.A、verymuchB、badlyC、seriouslyD、cos
Theyinsistedontrying,utterly______thepossibleseriousconsequence.A、prior
Theyhavenotyetentered______seriousnegotiationinthefirstroundoftheta
YoucanbelievehimbecauseIknowhetoldthe______truth.A、seriousB、severeC
[originaltext]W:Tom,youreallymusttakeschoolmoreseriously.Ifyoudon’t
[originaltext]W:Tom,youreallymusttakeschoolmoreseriously.Ifyoudon’t
随机试题
PASSAGETHREE[br]Whatdoestheword"gourmet"inthe4thparagraphmean?Delica
Muchtimeandefforthasbeendedicatedtoresearchingthementalhealthben
(Website)VisitorAgreementStatesman.comisprovided
[originaltext]W:JeanreallylosthertemperinDr.Brown’sclassthismorning.
硅胶柱层析,氯仿一甲醇适当比例洗脱,最先流出的是()
以公益、公用为目的的房地产的适用()进行估价A.成本法 B.收益法 C.比价
人力资源部BSC学习与成长包括( )。A.培训和发展评估 B.培训费占工资总
下列关于牙周病三级预防,正确的说法是A.一级预防又称“三早”预防 B.二级
企业基本薪酬设计的前提是()。A.薪酬调查和职位等级的建立 B.进行工作分析
D煤矿设计生产能力为120×104t/a,1983年投产。主要可采煤层为10号
最新回复
(
0
)