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
2016-03-05
44
问题
Successful innovations have driven many older technologies to extinction and have resulted in higher productivity, greater consumption of energy and 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 prime sources 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 mule 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 used in industry and land and ocean transport. They would have recognized further that it would be the prime source of power on 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 power on U. S. farms in 1870?
选项
A、animals
B、humans
C、engineers
D、water
答案
A
解析
根据第二段In 1870,horse and mules were the prime source of power on U.S.farms.可知在1870年马和驴子是美国农场上主要的动力源。故A正确。
转载请注明原文地址:https://kaotiyun.com/show/pPHC777K
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
—Tony:Hey,IjustwanttoapologizeforwhatIsaidtheotherday.—Tim:______Youknowwe’regoodfriends.
—I’mthinkingofthetesttomorrow.I’mafraidIcan’tpassthistime.—______!I’msureyou’llmakeit.
Ifyou_____5minutesearlier,you_____him.
Therearetwofactorswhichdetermineanindividual’sintelligence.Thefirstisthesortofbrainheisbornwith.Humanbrain
A、specialB、officialC、especiallyD、physicalD
Aperson’shomeisasmuchareflectionofhispersonalityastheclotheshewears,thefoodheeatsandthefriendswithwhom
Aperson’shomeisasmuchareflectionofhispersonalityastheclotheshewears,thefoodheeatsandthefriendswithwhom
ThetraditionalAmericanThanksgivingDaycelebrationgoesbackto1621.InthatyearaspecialfeastwaspreparedinPlymouth,
Itisdifficulttounderstandthiskindof______calculation.
Sofast______thatitisdifficulttoimagineitsspeed.
随机试题
政策不仅要告诉人们什么是该做的,什么是不该做的,而且还要使人们明白,为什么要这样做而不那样做,怎样才能做得更好。这表明政策具有()
下列五输穴中,属于本经子穴的是
硝苯地平治疗高血压过程中,患者出现踝部水肿,发生原因是
关于法和道德之间关系的正确表述是()。
关于运用假设开发法评估某酒店在建工程的投资价值(其中开发完成后的房地产价值采用收益法测算)的说法,正确的有()。
“申报日期”栏应填()。
出卖人出卖交由承运人运输的在途标的物,除另有约定外,毁损、灭失的风险自合同成立时起由()承担。
给唐.王勃所写《滕王阁序》选断句。时维九月序属三秋潦水尽而寒潭清烟光凝而暮山紫俨骖騑于上路访风景于崇阿临帝子之长洲得仙人之旧馆层峦耸翠上出重霄飞阁流丹下临无地鹤汀凫渚穷岛屿之萦回桂殿兰宫列冈峦之体势披绣闼俯雕甍山原旷其盈视川泽纡其骇瞩闾阎扑地钟鸣鼎食之家
溢出效应是指一个组织在进行某项活动时.不仅会产生活动所预期的效果,而且会对组织之外的人或社会产生影响。根据上述定义,下列属于溢出效应的是:
A、Ontheirownelectronicmonitors.B、Onthepassword-protectedwebsite.C、Onthesportschairman’scomputer.D、Onthecolorscr
最新回复
(
0
)