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
2024-02-18
8
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] 【B5】
选项
答案
unhealthy
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3462015.html
相关试题推荐
Thefarmers’houses,whichlocateinthevalley,areenclosedby______andfenc
Conditionseverywherehavebeenseriouslyworsened,______thepostwarriseinp
Theoilcrisisbyfar______themostseriousproblemthatthegovernmentfaced.
Theywere______hurtbyyourruderemarks.A、verymuchB、badlyC、seriouslyD、cos
______careinhospitalsshouldbegiventothosewhoareseriouslyill.A、Extens
Theyinsistedontrying,utterly______thepossibleseriousconsequence.A、prior
[originaltext]W:Tom,youreallymusttakeschoolmoreseriously.Ifyoudon’t
[originaltext]W:Tom,youreallymusttakeschoolmoreseriously.Ifyoudon’t
[originaltext]W:Tom,youreallymusttakeschoolmoreseriously.Ifyoudon’t
[originaltext]W:Tom,youreallymusttakeschoolmoreseriously.Ifyoudon’t
随机试题
______(无论侵略者何时来,怎样来),theywillbewipedoutclean.Nomatterwhenandhowthein
InLondon,overhalfofthehomesbuiltbetween1919and1980hadonegarage
DetroitisfamousfortheproductionofA、automobile.B、timber.C、bamboo.D、rocke
安全检查应注意将互查与自查有机结合起来,坚持检查和整改相结合,关注建立安全生产档
服驱绦虫药后,检查大便以确定疗效,主要检查有无A.虫卵 B.头节 C.未成熟
A.舌肌 B.二腹肌 C.翼外肌 D.颞肌和翼内肌 E.口轮匝肌和上、下
患者男性,50岁。因旅游途中进食海鲜后1天出现右足趾及趾跖关节剧烈疼痛,伴红肿,
A.30~60分钟上升至高峰 B.高峰时为基础值的5~10倍 C.峰值与血
根据仲裁法律制度的规定,下列属于无效仲裁协议的有()。A.限制民事行为能力人与
无毒、抗菌卫生,主要用作工业及生活饮用水,冷、热水输送的管道是指()A.丁烯管
最新回复
(
0
)