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
67
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.
【R1】
选项
答案
C
解析
该空后面提到“这些早期的自行车有两个轮子,但没有踏板。”由此可知,该空应该与最早的自行车出现有关,符合条件的只有C项。
转载请注明原文地址:https://kaotiyun.com/show/2e8K777K
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
Bydegreestheshutterswereopened:thewindow-blindsweredrawnup,andpeoplebeganpassingtoand【C1】______.Somefewstoppe
—______—Itshouldbegood.I’mlookingforwardtotakingit.
Muchofthediscussionofenvironmentalproblemsinthepopularpressleavesthereaderwiththeimpressionthatmattershavebe
DictationListentothepassage.Forquestions21~25,fillintheblankswiththeexactwordsorphrasesyouhear.Therei
WhichofthefollowingsisNOTareasonwhywomenbossesareunpopular?
WhentheMonaLisawasstolenfromtheLouvreMuseumin1911,【D1】______aroundtheworldclaimedthatthemostfamouspainting
Brazilianscertainlyknowhowtothrowaparty—butwillRiobereadytowelcomeover10,000athletesandalltheinternationalv
有些人的成功常常让周围的人大惑不解,因为他们似乎从来都不工作,或者没有长时间地工作。【T1】他们的成功秘诀在于他们专注的能力,因而能够凭借最小的明显努力获得最大的成果。(liein)爱默生说:“无论是在政治、战争、商业,还是在一切人类事务的处理中,专注都
ThestatueoftheLittleMermaidisafamouscity______andamajortourists’attractioninDenmark.
WewishtoexpressoursatisfactionatthistotheSpecialCommittee,whoseactivitiesdeservetobeencouraged.
随机试题
患者男,34岁。因头晕、乏力2年,加重伴皮肤黄染25天来诊。检测WBC3.0×109/L,Hb50g/L,PLT48×109/L;网织红细胞0.20;血清铁蛋白12μg/L;骨髓涂片示增生活跃,红系占0.53,以中、晚幼红细胞增生为主;尿胆红质(一),尿胆
抗惊厥药扑痫酮的一种活性代谢产物是
男性,40岁,右上腹钝器伤,查体:呼吸加伙,神志不清,脉搏140次/分,血压70/50mmHg,腹膨隆,移动性浊音(+),考虑外伤性肝脏破裂,紧急处理方法
下列哪项不是造成不孕的原因
确定路基填土压实质量是否符合要求必须做以下试验()。
针对路基弹簧现象,可采取的治理措施是()。
兴盛有限责任公司是一家小型企业,财务部门有一位出纳、一位会计、一位会计机构负责人,要完成以下9项工作:①填制记账凭证;②登记债权、债务明细分类账和其他明细分类账;③办理银行结算;④收付现金;⑤检查银行对账单、审核银行存款余额调节表和会计报表;⑥登记现金日记
年初某家电商场决定新增电冰箱销售业务,据市场调查资料显示:作为同行企业的10家商场去年的销售状况基本上处于2000台、3000台、4000台的水平上,最高的达到5000台。通常每销售一台电冰箱平均可获利200元,而每积压一台电冰箱则损失100元。据此,给出
=______。
MostvolcanoesarequietTheyrestpeacefullyforhundredsofyears.Noonepaysmuchattentiontothem.MountSt.Helenswasone
最新回复
(
0
)