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
2023-06-25
66
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:http://tihaiku.com/zcyy/2782555.html
相关试题推荐
[originaltext]Americansthinkagreatdealabouttime.Theyconstantlyrefe
[originaltext]Mostkidsaremuchbetterthantheirparentsatprogrammingt
[originaltext]Someoftheplanet’smostpreciousanimalsandplantsaredis
[originaltext]Someoftheplanet’smostpreciousanimalsandplantsaredis
[originaltext]Someoftheplanet’smostpreciousanimalsandplantsaredis
[originaltext]Fortwenty-fiveyears,Iwasafull-timethief,specializing
[originaltext]Fortwenty-fiveyears,Iwasafull-timethief,specializing
[originaltext]"Gototheplaygroundandhavefun",parentswilloftensayt
[originaltext]Doyourememberatimewhenpeoplewerealittlenicerandge
[originaltext]Doyourememberatimewhenpeoplewerealittlenicerandge
随机试题
Brownbreadandbutter________usuallyeatenwithsmokedsalmonintheWest.A、is
一圆盘正绕垂直于盘面的水平光滑固定轴O转动,如图所示,射来两个质量相同、速度大小
施工专项方案经论证后,专家组应当提交论证报告,对论证的内容提出明确的意见,并在论
安全管理策划方案应不包括( )。A.举办场地曾经发生事故的应对方案 B.规模
有关血栓闭塞性脉管炎,下列哪项是错误的A.主要侵袭四肢 B.早期主要是细菌感染
A.黄芩 B.苦参 C.龙胆 D.黄柏 E.黄连功能清热燥湿,又善祛风杀
就造血多能干细胞而言,下述说法正确的是A:仅存在于骨髓中,其形态和淋巴细胞相似
A.一级生物安全防护实验室B.二级生物安全防护实验室C.三级生物安全防护实验室D
在商品发运的业务流程中,( )是做好商品发运的前提条件。 A.备运B.组
直接决定某一房地产价格水平高低的供求状况,主要是()房地产的供求状况。A.
最新回复
(
0
)