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
22
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] 【B4】
选项
答案
appeared
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2845750.html
相关试题推荐
[originaltext]Whenfarmersandwildanimalsshareland,conflictscanbeha
[originaltext]Whenfarmersandwildanimalsshareland,conflictscanbeha
Someguidelinesthatadvisepeoplehowtoloseweightareseriouslyflaweda
TherecessionistakingaserioustollonAmericanretail,bute-commerceco
TherecessionistakingaserioustollonAmericanretail,bute-commerceco
TherecessionistakingaserioustollonAmericanretail,bute-commerceco
TherecessionistakingaserioustollonAmericanretail,bute-commerceco
TherecessionistakingaserioustollonAmericanretail,bute-commerceco
TherecessionistakingaserioustollonAmericanretail,bute-commerceco
TherecessionistakingaserioustollonAmericanretail,bute-commerceco
随机试题
GeneralIdeasaboutRhetoricI.Thedefinition&unders
A. B. C. D.
下列不属于专利许可合同主要条款的是()。A.专利技术的内容和专利的实施方式
岩质边坡的破坏失稳与岩体中发育的()有很大关系。A.结构面 B.结构体
按照信用风险发生的形式,可分为()。A.非系统性信用风险 B.系统性信用
按污染的性质,食品污染可分为( )。A.生物性污染 B.化学性污染
下列戏曲剧目中,属于现代京剧的是() A.《十五贯》 B.《四郎
吸氧时,氧流量为3L/分,吸氧浓度是多少A.25% B.29% C.33%
社会主义的根本任务是()。A.改革开放 B.消灭剥削 C.解放和发展生
项目监理机构对特别重要设备的制造过程质量控制可采取( )方式。A.驻厂监造 B
最新回复
(
0
)