首页
登录
职称英语
Let us consider what science and technology have to contribute to the food
Let us consider what science and technology have to contribute to the food
游客
2023-11-21
10
管理
问题
Let us consider what science and technology have to contribute to the food problem.
The simplest way to increase food production, one might suppose, is to bring more land 【C1】______ cultivation and put more people to work on it. Some of the underdeveloped countries have resorted to this 【C2】______ approach, without notable success. It contains several fallacies. For one thing, it usually means 【C3】______ into marginal lands where the soil and climatic conditions give a poor 【C4】______ . Cultivation may quickly deplete this soil,【C5】______ it for pasture or forest growth. It is often possible, of course, to turn such lands into useful farms by agricultural 【C6】______ ; for instance, a sophisticated knowledge of how to use the available water【C7】______ an irrigation system may reclaim semi-arid grasslands for crop-growing. But the cultivation of marginal lands i6 in any case unsuccessful【C8】______ it is carried out by farmers with a centuries - old tradition of experience or by modern ex pelts with a detailed knowledge of the【C9】______ conditions and the varieties of crops that are suitable for those conditions. Such knowledge is【C10】______ absent in the underdeveloped countries.
【C11】______ , we know that highly developed countries have not increased the【C12】______ of acres under cultivation, 【C13】______ on the contrary have 【C14】______ their marginal lands and steadily reduced the proportion of the population engaged in farming. Efficient farming【C15】______ concentration on the most efficient lands, and it results in greater production with【C16】______ people. The problem of the underdeveloped countries, then is to increase the【C17】______ of their farms and farmers. This would allow them to industrialize and to feed their people more adequately. It is not easy to【C18】______ , how ever. The farmers are conservative and resistant to change【C19】______ their methods of cultivation. The underdeveloped countries are greatly in need of studies and experiments to help them to【C20】______ modern agricultural methods to their own conditions. [br] 【C1】
选项
A、under
B、of
C、by
D、in
答案
A
解析
此题考查介词用法。A项under表示处于某种状态中,填入空中“bring more land under cultivation(使更多的土地变成耕地)”符合题意。
转载请注明原文地址:https://tihaiku.com/zcyy/3206334.html
相关试题推荐
TheCloningTechnologyI.Thedifference
TheCloningTechnologyI.Thedifference
TheCloningTechnologyI.Thedifference
TheCloningTechnologyI.Thedifference
TheCloningTechnologyI.Thedifference
TheCloningTechnologyI.Thedifference
TheCloningTechnologyI.Thedifference
[originaltext]J:Becausein1987theDepartmentofEducationandScienceestabl
[originaltext]J:Becausein1987theDepartmentofEducationandScienceestabl
[originaltext]J:Becausein1987theDepartmentofEducationandScienceestabl
随机试题
WhichofthefollowingisNOTtrueoftheUSeconomy?A、TheAmericaneconomyisc
MarriageisconsideredanoccasionofgreatrejoicingintheWestasitisi
ThebirthoftheSpaceTransportationSystem(STS)andtheneweraofspace
占地面积大于()的丙类仓库应设置排烟设施。A.500㎡ B.1000㎡
A.淋巴结活检发现镜影(RS)细胞 B.颅骨虫蚀样缺损伴皮肤湿疹样皮疹 C.
巴班斯基等人用了两年的时间对学困生学习,认识活动的特点进行了研究,发现学困生的思
(一) ××市人民政府文件 ×政发(2014)122号 有关加强街
不完全角化前细胞核染色质特点为()A.固缩B.深染C.核明显缩小D.ABC都对
某企业计划进行某项投资活动,该投资活动需要在投资起点一次投入固定资产投资200万
下列()属于工程造价控制的经济措施。A.明确项目组织机构 B.重视设计多
最新回复
(
0
)