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
外语
The bicycle was not invented by one individual or in one country. It took nearly 100 years and many individuals for the modem bi
The bicycle was not invented by one individual or in one country. It took nearly 100 years and many individuals for the modem bi
admin
2021-12-28
22
问题
The bicycle was not invented by one individual or in one country. It took nearly 100 years and many individuals for the modem bicycle to be born. By the end of those 100 years, bicycles had revolutionized the way people traveled from place to place.
【R1】________These early bicycles had two wheels, but they had no pedals. The rider sat on a pillow and walked his feet along the ground to move his velocipede forward.
Soon a French inventor added pedals to the front wheel. Instead of walking their vehicles, riders used their feet to turn the pedals. However, pedaling was hard because velocipedes were very heavy. The framework was they had no pedals. The rider sat on a pillow and walked his feet along the ground to move his velocipede forward.
Soon a French inventor added pedals to the front wheel. Instead of walking their vehicles, riders used their feet to turn the pedals. However, pedaling was hard because velocipedes were very heavy. The framework was made of solid steel tubes and the wooden wheels were covered with steel. Even so, velocipedes were popular among rich young men, who raced them in Paris parks.
Because velocipedes were so hard to ride, no one thought about using them for transportation. People didn’t ride velocipedes to the market or to their jobs. Instead, they thought velocipedes were just toys.
【R2】________They began building velocipedes, too, but with one difference. They made the frameworks from hollow steel tubes. This alteration made velocipedes much lighter, but riders still had to work hard to pedal just a short distance. In addition, roads were bumpy, so steering was difficult. In fact, most riders preferred indoor tracks where they could rent a velocipede for a small fee and take riding lessons.
【R3】________They saw that when a rider turned the pedals once, the front wheel turned once. If the front wheel was small, the bicycle traveled just a small distance with each turn. They reasoned that if the front wheel were larger, the bicycle would travel a greater distance. So they designed a bicycle with a giant front wheel. They made the rear wheel small. Its primary purpose was to help the rider balance.
Balancing was hard because the rider had to sit high above the giant front wheel in order to reach the pedals. This meant he was in danger of falling off the bicycle and injuring himself if he lost his balance. Despite this inherent danger, "high wheelers" became very popular in England.
【R4】________Their goal was to make a safer bicycle. They substituted a small wheel for the giant front wheel and put the driving mechanism in a larger rear wheel. It would be impossible for a rider to pedal the rear wheel, so engineers designed a system of foot levers. By pressing first the right one and then the left, the rider moved a long metal bar up and down. This bar turned the rear axle. This axle turned the rear wheel and the bicycle moved forward. Because the new safety bicycle minimized the dangers inherent in bicycle riding, more and more people began using bicycles in their daily activities.
【R5】________They made the two wheels equal in size and created a mechanism that uses a chain to turn the rear wheel. With this final change, the modern bicycle was born.
Subsequent improvements, such as brakes, rubber tires, and lights were added to make bicycles more comfortable to ride. By 1900, bicycle riding had become very popular with men and women of all ages. Bicycles revolutionized the way people traveled. Today, millions of people worldwide ride bicycles for transportation, enjoyment, sport and exercise.
A. The British altered the design one last time.
B. People in Pairs paid a fee to ride velocipedes to their jobs.
C. Bicycles first appeared in Scotland in the early 1800s, and were called velocipedes.
D. American manufacturers once again tried to design a better bicycle.
E. Riders must be good athletes to meet the physical demands that are an inherent part of a long race.
F. Around 1870, American manufacturers saw that velocipedes were very popular overseas.
G. Subsequent changes by British engineers altered the wheels to make pedaling more efficient.
【R3】
选项
答案
G
解析
该空后面提到“他们推断,如果前轮大一些,自行车行驶的距离就会远一些。所以他们设计了一辆前轮巨大的自行车,他们把后轮做得很小,主要目的是帮助骑手保持平衡。”由此可知,该空应该与改进车轮以实现高效骑行有关,符合条件的只有G项。
转载请注明原文地址:https://kaotiyun.com/show/ne8K777K
本试题收录于:
B类竞赛(英语专业本科专科)题库大学生英语竞赛(NECCS)分类
0
B类竞赛(英语专业本科专科)
大学生英语竞赛(NECCS)
相关试题推荐
TheChineseinventedblockprinting(雕版印刷)morethan1,400yearsago.Theoriginalcharacterswereengravedonwoodandinkwasth
Nearlyeveryhospitalhasthesameunwrittenregulation—thebadlywoundedhavepriority______thoseonlyslightlyhurt.
Inordertogetinformationaboutdistantplanets,scientistsinventedspacecrafttotravelintothesolarsystemtoseethepla
Inordertogetinformationaboutdistantplanets,scientistsinventedspacecrafttotravelintothesolarsystemtoseethepla
TheRedCrosshasbeenhelpingduringtimesoftroublefornearly160years.Picturesofwars,earthquakes,ortornadoesoftens
TheRedCrosshasbeenhelpingduringtimesoftroublefornearly160years.Picturesofwars,earthquakes,ortornadoesoftens
TheRedCrosshasbeenhelpingduringtimesoftroublefornearly160years.Picturesofwars,earthquakes,ortornadoesoftens
Nearlyeveryoneloveshoney.Forasweettreat,drizzlegoldenhoneyoverabutteredwaffle.Stirhoneyintoasteamingcupoft
随机试题
粉红色泡沫样痰见于()
房地产经纪专业人员的权利包括()。
(2016年)2015年12月31日,甲公司以专利技术自非关联方乙公司换入70%股权,取得控制权,专利技术原值为1200万元,已摊销额为200万元,公允价值为1500万元,乙公司可辨认净资产账面价值800万元,公允价值900万元,不考虑其他因素,该业务
奥苏贝尔认为,学生学习的主要形式是有意义的接受学习。()
发生扭伤后,损伤部位出血、肿胀和疼痛,可采用热敷的方法以达到止血、消肿、止痛的目的。()
近日,呼和浩特市政府对非法改装、违法上路、非法运营的机动车进行集中整治,并颁布规定。禁止非法二轮车、三轮车在马路上穿行。该规定导致快递公司快件大量积压。市民对此也纷纷抱怨。请谈谈你的看法。
某甲在国家机关任职,某乙有求于他的职务行为,给某甲送去5万元的好处费。某甲答应给某乙办事,但因故未成。于是某乙要求某甲退还好处费,某甲拒不退还,并威胁某乙如果再来要钱就告某乙行贿。某甲的行为构成()。
编译器对高级语言源程序的处理过程可以划分为词法分析、语法分析、语义分析、中间代码生成、代码优化、目标代码生成等几个阶段,其中,()并不是每种编译器都必需的。
Mostyoungpeopleenjoysomeformofphysicalactivity.Those(51)haveapassionforhighanddifficultmountainsareoftentrea
Newtechnologylinkstheworldasneverbefore.Ourplanethasshrunk.It’snowa"globalvillage"wherecountriesareonlyseco
最新回复
(
0
)