首页
登录
职称英语
[originaltext] Over the years, new technologies have changed farming. Change
[originaltext] Over the years, new technologies have changed farming. Change
游客
2023-06-26
67
管理
问题
Over the years, new technologies have changed farming. Change m a general direction is a trend. Yet people often recognize trends only when they consider the past Today, we look back at some trends in American agriculture. In 1920, America had more than 25 million horses and mules. Most were used for farm work. Around the same time, a competitor began to appear in large numbers-Tractors could turn soil, pull loads and speed harvests—and they could do it better. More tractors meant fewer horses and mules. By the 1960s, the numbers of these work animals settled to where they remain today. That is about one-tenth the levels in 1920. Yet even the demand for tractors had its limits. Their numbers have been slowly decreasing since 1982. Experts say farmers can do more with less now because of new technologies. As tractors replaced horses and mules, farmers no longer needed to raise crops to feed work animals. Oats have long been food for horses and mules. In 1954, American farmers planted over sixteen million hectares of oats. By 2000, that was down to less than one million hectares. So what did the farmers do with the extra land? More and more farmers began to plant a new crop around the same time that the tractor became popular. It was the soybean. The soybean is one of the oldest plants harvested. Yet it was not planted widely in the United States until the 1920s. By the year 2000, close to 30 million hectares were planted with soybeans. It is the nation’s most important crop for high-protein animal feed and for vegetable oil.[25]In fact, soybeans are the second most valuable crop grown by American farmers after corn. Much of the soybean production goes to exports.
22. In which year did tractors begin to appear in large numbers?
23. How many horses and mules did America have in the 1960s?
24. What is America’s most important crop for high-protein animal feed and for vegetable oil?
25. What is the most valuable crop grown by American farmers?
选项
A、Over 16 million.
B、Over 3.5 million.
C、Over 1 million.
D、Over 2.5 million.
答案
D
解析
短文说,1920年,美国用于农业生产的马、骡数量总共有2500多万,此后一路减少,到20世纪60年代,数目趋于稳定,迄今没有变化。目前约有1920年的1/10。由此可计算出,20世纪60年代美国用于农业生产的马、骡牲口共250多万,故D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2784185.html
相关试题推荐
[originaltext](22)Sportshaveunwrittenrules,sodoesbusiness—andviolat
[originaltext]IhadspentmylastdayinLondonvisitingfriends,takingpi
[originaltext]Passionfruitistheediblefruitofthepassionflower.(16)S
[originaltext]W:Youdon’tlooktoowell.Maybeyoushouldtakethedayofffro
[originaltext]W:Youdon’tlooktoowell.Maybeyoushouldtakethedayofffro
[originaltext]W:Youlookbettertoday.Howdidyourtestgo?M:Muchbetterth
[originaltext]W:Youlookbettertoday.Howdidyourtestgo?M:Muchbetterth
[originaltext]W:Youlookbettertoday.Howdidyourtestgo?M:Muchbetterth
[originaltext]W:Youlookbettertoday.Howdidyourtestgo?M:Muchbetterth
[originaltext](5)ThedryconditionsinCaliforniaaregoodforpeoplewho
随机试题
Comparedwiththeimmediatepracticalresponsibilityofthescientist,the(
A.54.0kN·m B.67.5kN·m C.90.0kN·m D.13
高血压病十余年,一年来活动后呼吸困难,夜间常胸闷气急而惊醒,坐位可以缓解。此病例
清营汤的功用是A.清营透热,养阴活血 B.清营解毒,透热转气 C.清营凉血,
()是指收集、整理、加工有关基金投资运作的会计信息,准确记录基金资产变化情况,
在沙保罗培养基中加入放线菌酮是为了A.促进真菌生长 B.抑制细菌生长 C.抑
利培酮属A.丁酰苯类 B.硫杂蒽类 C.苯甲酰胺类 D.非典型抗精神病药
(2015年5月)( )是国外企业培训效果评估方法中发展最完善、运用最广泛的一
某日某期货合约的收盘价为17210元/吨,结算价为17240元/吨,该合约的每日
肉桂的性能特点有A.辛甘而热 B.益阳消阴 C.纯阳温散 D.引火归原
最新回复
(
0
)