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
55
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] 【C12】
选项
A、numbers
B、number
C、quantity
D、quantities
答案
B
解析
此题考查词的用法,增加开垦的数量。B项符合题意。
转载请注明原文地址:https://tihaiku.com/zcyy/3206345.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
[originaltext]M:Couldwehaveaquickwordaboutthesalesconference?W:Yes,
[originaltext]W:Goodmorning,Mr.Brown.M:Oh,comein,Mary.I’vebeenexpec
[img]2018m9s/ct_etoefz_etoeflistz_201808_0009[/img][br]Whydoestheprofessor
[originaltext]M:It’ssocoldnow,butthismorningitwassohotandsunny.I
CovalentBond()A.氢键 B.离子键 C.次价键 D.共价键
信用利差是用以向投资者()的、高于无风险利率的利差。A:补偿利率波动风险 B
在维生素C的4个光学异构体中活性最强的是A.L(±)维生素C B.D(+)维生
A.1:1 B.2:3 C.5:4 D.12:11
《行政诉讼法》中因不动产提起了行政诉讼,有管辖权的是( )。A.原告所在地人民
A.执业药师应履行的职责 B.执业药师继续教育的内容 C.执业药师注册的规定
最新回复
(
0
)