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
专升本
Successful innovations have driven many older technologies to extinction and have resulted in higher productivity, greater consu
Successful innovations have driven many older technologies to extinction and have resulted in higher productivity, greater consu
admin
2007-12-01
53
问题
Successful innovations have driven many older technologies to extinction and have resulted in higher productivity, greater consumption of energy, increased demand for raw materials, accelerated flow of materials through the economy and increased quantities of metals and other substances in use each person. The history of industrial development abounds with examples.
In 1870, horses and mules were the prime source of power on U. S. farms. One horse or mule was required to support four human beings—a ratio that remained almost constant for many decades. At that time, had a national commission been asked to forecast the horse and the population for 1970, its answer probably would have depended on whether its consultants were of an economic or technological turn of mind. Had they been "economists" , they would probably have projected the 1970 horse or mule population to be more than 50 million. Had they been "technologists", they would have recognized that the power of steam had already been harnessed to industry and to land and ocean transport. They would have recognized further that it would be the prime source of power on the farm. It would have been difficult for them to avoid the conclusion that the horse and mule population would decline rapidly.
According to the passage, what supplied most of the power on U. S. farms in 170?
选项
A、Animals.
B、Humans.
C、Engines.
D、Water.
答案
A
解析
细节题。第二段的第一句话讲了horse和mules是主要的劳动力,也就是说动物是主要的劳动力。
转载请注明原文地址:https://kaotiyun.com/show/MsLC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
FromthepassagewemayknowthatthesituationinRussiain1917was______.People______TsarNicholasIIin1917.
Whensheheardthebellringing,Lucyrosefromherchairandmadeherwaytothedoor,whileherhusbandsatrootedinhisseat
Historianscan’ttelluswhen,whereor【71】thefirstfoodwascooked.Inearliest【72】whenpeoplehadeatentheirfood【73】,
Isawatraffic______thismorning.
Notuntilmanyyearslater______known.
Becauseofrisingcost,wespent______moneyontheprojectashadbeenplanned.
Maxhasno______(appreciate)ofthefinethingsinlife.
Thisisoneofthemostbeautifulsongs______Ihaveeverheard.
IthinklifeisgenerallyhealthierinthecountryandIlike______tonature.
______somemammalscametoliveintheseaisunknown.
随机试题
装用电动风扇的发动机,发动机冷却液温度高于规定数值时风扇不转,应检查_______是否良好。
定额中断路器的计量单位()。
在人身保险合同中,保险人按照约定对被保险人()给付保险金的责任。
垓下古战场景区可以分为哪些景区?()
福勒和布朗根据教师的需要和不同时期所关注的焦点问题,把教师成长划分为______、______和______三个阶段。
人民代表大会制度的核心内容和实质是()。
人和动物生命的最根本的区别就在于人能把自己作为控制的对象,而控制是开发智力潜力的关键。从这段话可知下述不正确的一项是( )。
汉朝法律儒家化的表现有()。
Theevidencesupportstheviewthatunderconditionswhichneedit,acryisawonderfulrestorative.
Britainisfacinga【C1】______riseinitsratpopulation【C2】______growingnumbersofpeopleleavefastfoodscrapsinthestreet,
最新回复
(
0
)