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
2024-01-28
3
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/3400451.html
相关试题推荐
[originaltext]Allthepeoplecanteachyousomething,whethertheyhaveenjo
[originaltext]Innearlyallcivilizations,atnearlyalltimesinhistory,m
[originaltext]Innearlyallcivilizations,atnearlyalltimesinhistory,m
[originaltext]Youcantelltheageofatreebycountingitsrings.Butthes
[originaltext]Youcantelltheageofatreebycountingitsrings.Butthes
[originaltext]M:Goodmorning.W:Goodmorning.HowcanIhelpyou?M:Iunders
[originaltext]M:Goodmorning.W:Goodmorning.HowcanIhelpyou?M:Iunders
[originaltext]M:Goodmorning.W:Goodmorning.HowcanIhelpyou?M:Iunders
[originaltext]W:Hello.CanItakeyourorder?M:Yes.I’dlikealargepeppero
[originaltext]W:Hello.CanItakeyourorder?M:Yes.I’dlikealargepeppero
随机试题
FromthefirstparagraphweknowthatintheUnitedStates,thecar______.[br]
Usingextremelydifferentdecoratingschemesinadjoiningroomsmayresultin__
中央银行在运用货币政策进行金融宏观调控时,主要是通过调控()来影响社会经济生活的
用( )做模型,用来研究钢筋混凝土的弹塑性和极限工作能力比较理想。A、有机玻璃
A.抑制单胺氧化酶 B.抑制TXA生成 C.抑制胆碱酯酶 D.激动多巴胺受
自然语言理解是人工智能的重要应用领域,以下不是它要实现的目标是()A.理解别
量化风险的手段和工具包括()。 Ⅰ.VaR法 Ⅱ.敏感性分析法 Ⅲ.
有关健康的正确说法是A.健康是指体格健全没有疾病 B.不生病就是健康 C.健
在泵站的进出水建筑物中,属于泵站的进水建筑物的是()。A.引水渠 B.压力水
期末,企业将有关债权债务明细账账面余额与对方单位的账面记录进行核对,这种对账属于
最新回复
(
0
)