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
46
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] 【B8】
选项
答案
fertile
解析
转载请注明原文地址:http://tihaiku.com/zcyy/2845754.html
相关试题推荐
Thefarmers’houses,whichlocateinthevalley,areenclosedby______andfenc
Conditionseverywherehavebeenseriouslyworsened,______thepostwarriseinp
Theoilcrisisbyfar______themostseriousproblemthatthegovernmentfaced.
Weshouldalwaysbearinmindthat______decisionsoftenresultinseriousconse
______careinhospitalsshouldbegiventothosewhoareseriouslyill.A、Extens
Seriousasthedamage______theshipwas,thecaptainwithhiscrewsucceededi
Theyinsistedontrying,utterly______thepossibleseriousconsequence.A、prior
YoucanbelievehimbecauseIknowhetoldthe______truth.A、seriousB、severeC
[originaltext]W:Tom,youreallymusttakeschoolmoreseriously.Ifyoudon’t
[originaltext]W:Tom,youreallymusttakeschoolmoreseriously.Ifyoudon’t
随机试题
Manyprivateinstitutionsofhighereducationaroundthecountryareindan
Mostofficeworkerssaytheyarerudeorbad-manneredatwork.Inasurveyo
Whenyouhavetomeetsomeonefromadifferentculture,beprepared.Ifyou
患者,男,58岁,主诉中上腹不适胀痛20年,加重1个月,无反酸及黑便,体检心肺检
肺动脉瓣狭窄典型的杂音是()A.胸骨左缘第2肋间舒张期杂音 B.胸骨左
中国成人判断超重和肥胖程度的界限值中,界限值BMI小于18.5kg/m2为()。
2.高压熔断器熔断更换后再次熔断时,可以再更换相同型号的熔断器后再次试送。(
我国的账户种类根据用途划分可分为()。A:上海证券账户B:人民币普通股票账户
前牙3/4冠邻面预备时,错误的是A:近远中面平行 B:与长轴平行 C:唇侧边
"患者仰卧在躺椅上畅所欲言,治疗者在倾听和释问中解释患者的潜意识、情绪或幼年的特
最新回复
(
0
)