首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
【F1】The agricultural sciences deal with the challenges of food and fibre production and processing. They include the technologie
【F1】The agricultural sciences deal with the challenges of food and fibre production and processing. They include the technologie
admin
2016-10-15
45
问题
【F1】
The agricultural sciences deal with the challenges of food and fibre production and processing. They include the technologies of soil cultivation, crop cultivation and harvesting, animal production, and the processing of plant and animal products for human consumption and use.
Food is the most basic human need.【F2】
The domestication and cultivation of plants and animals beginning almost 10,000 years ago were aimed at ensuring that this need was met, and then as now these activities also fit with the relentless human drive to understand and control the Earth ’s biosphere.
Over the last century and a half, many of the world’s political leaders have recognized what India’s Jawaharlal Nehru did, that "Most things except agriculture can wait. " Scientific methods have been applied widely, and the results have revolutionized agricultural production. Under the conditions of prescientific agriculture, in a good harvest year, six people can produce barely enough food for themselves and four others. Advanced technologies have made it possible for one farmer in the United States, for example, to produce food for more than 100 people.【F3】
The farmer has been enabled to increase yields per acre and per animal; reduce losses from diseases, pests, and spoilage; and augment net production by improved processing methods.
Until the 1930s, the benefits of agricultural research derived mostly from labour-saving inventions. Once the yield potentials of the major economic crops were increased through agricultural research, however, crop production per acre increased dramatically.【F4】
Between 1940 and 1980 in the United States, for example, per-acre yields of corn tripled, those of wheat and soybeans doubled, and farm output per hour of farm work increased almost 10-fold as capital was substituted for labour.
【F5】
New techniques of preserving food products made it possible to transport them over greater distances, in turn facilitating adjustments among locations of production and consumption, with further benefits to production efficiency
.
From a global perspective, the international flow of agricultural technology allows for the increase of agricultural productivity in developed and developing countries alike. From 1965 to 1985, for example, world trade in grains tripled, as did net exports from the United States. In fact, by the 1980s more than two-fifths of U. S. crop production was exported, making U. S. agriculture heavily dependent upon international markets.
【F4】
选项
答案
例如美国,从1940年到1980年,玉米每英亩产量增至原来的3倍;小麦和大豆每英亩产量翻了1番;随着资本取代劳工,每小时农业工作的效益几乎翻了10番。
解析
转载请注明原文地址:https://kaotiyun.com/show/CUoZ777K
0
考研英语一
相关试题推荐
OnAugust18thUSNews&WorldReportreleasedits2007rankingsofAmerica’stopcolleges.Thesurveybeganin1983asanunoff
PresidentBarackObamaclaimedprogressWednesdayinhissecond-termdrivetocombatclimatechangebutsaidmoremustbedonet
PresidentBarackObamaclaimedprogressWednesdayinhissecond-termdrivetocombatclimatechangebutsaidmoremustbedonet
PresidentBarackObamaclaimedprogressWednesdayinhissecond-termdrivetocombatclimatechangebutsaidmoremustbedonet
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
Expressionismisanartisticstyleinwhichtheartistseekstodepictnotobjectiverealitybutratherthesubjectiveemotions
随机试题
A.骨肉瘤B.乳腺癌C.非霍奇金淋巴瘤D.卵巢肿瘤E.肝细胞癌适合传统模式,术后辅助放化疗;或新辅助化疗后再手术的是
成年男性患者因误食鸡骨后吞咽痛2小时,间接喉镜未发现异物,应行的检查是
A.S区B.C区C.P区D.X区E.前S区HBcAg的编码区为
A.16岁以后B.3~6个月C.1~2岁D.4~6岁E.9~12岁唇腭裂序列治疗程序中语言评价及语言治疗时间为
个体工商户崔某从1999年起在某市经营一家饭店,向工商管理部门申请了营业执照。2006年因妻子生病亟须用钱,加上需要照顾病人无力继续经营,因而经协商将饭店转让给赵某,但双方并未到工商局办理营业执照的更名手续。2010年5月,赵某在经营过程中不慎致使多名顾客
下列有关各类电气装置施工程序的说法中错误的是()。
《学生伤害事故处理办法》认定,学校对学生安全负有的职责是()。
我国的社会保障制度改革的目标体系是建立与社会主义市场经济相适应的多层次的社会保障体系。(某省公开选拔党政领导干部公共科目考试试题)
Ifyou’reinahospitalandyourdoctorwantstomonitoryouwithoutbeingintheroom,there’sanappforthat.Therearealso
小江在制作公司产品介绍的PowerPoint演示文稿时,希望每类产品可以通过不同的演示主题进行展示,最优的操作方法是()。
最新回复
(
0
)