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
36
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.
【R4】
选项
答案
D
解析
该空后面提到“由于新型安全自行车将骑车的危险降到最小,因此越来越多的人开始在日常活动中使用自行车。”由此可知,该空应该与设计出一种更安全的自行车有关,符合条件的只有D项。
转载请注明原文地址:https://jikaoti.com/ti/5uAMFFFM
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
Inordertogetinformationaboutdistantplanets,scientistsinventedspacecrafttotravelintothesolarsystemtoseethepla
TheRedCrosshasbeenhelpingduringtimesoftroublefornearly160years.Picturesofwars,earthquakes,ortornadoesoftens
TheRedCrosshasbeenhelpingduringtimesoftroublefornearly160years.Picturesofwars,earthquakes,ortornadoesoftens
Nearlyeveryoneloveshoney.Forasweettreat,drizzlegoldenhoneyoverabutteredwaffle.Stirhoneyintoasteamingcupoft
随机试题
肱骨干中段骨折或手术最容易造成的并发症
在院外治疗时下列哪一项加重了病情患者行上述检查后,CT发现广泛腔隙性脑梗死+血糖30mmol/L,血钠165mmol/L,尿酮体+,应诊断为
男,35岁,下肢水肿2周,血压28/14kPa,尿蛋白+++,红细胞10一15/HP,尿糖+,血肌酐160μmol/L,血白蛋白32g/L。经足量糖皮质激素治疗8周,病情无好转,进一步治疗为
脾虚崩漏的主要证候,以下哪项是错误的
A、钜蚯蚓B、芜青科C、壁虎科D、鳖蠊科E、眼镜蛇科土鳖虫的原动物科名是
根据《导游人员管理实施办法》的规定,一次被扣除6分的情形是()。
习近平主席指出,在认识世界和改造世界过程中,旧的问题解决了,新的问题又会产生,制度总是需要不断完善,因而改革既不可能_______,也不可能_______。填入画横线部分最恰当的一项是:
有以下程序#includemain(){inta[3]={0},i,j,k=2;for(i=0;i<k;i++)for(j=0;j<k;j++)a[j]=a[i]+1;printf("%d\n",a
广州某公司的总经理刘汉需要制作公司的年度报告,但他最近有其他更重要的工作要做。请你按照如下要求帮他完成年度报告的制作工作:在“产品销售一览表”段落区域的表格下方,以嵌入型的环绕方式插入一个产品销售分析图,图表样式请参考“分析图样例.jpg”文件所示,并
ThemainreasonweexploreMarsistodetermineiflifeeverexistedontheplanet.Wehavetriedforcenturies,startingwith【
最新回复
(
0
)