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
uncomfortable本题询问自行车的缺点。录音原文中指出缺点(downside)是在很多路上,骑车非常不舒服。downside是表格栏名Disadvantage的同义替换,故空格处可直接填入uncomfortable。
uncomfortable本题询问自行车的缺点。录音原文中指出缺点(downside)是在很多路上,骑车非常不舒服。downside是表格栏名Disadvantage的同义替换,故空格处可直接填入uncomfortable。
admin
2022-09-09
71
问题
Good afternoon, ladies and gentlemen. I’d like to take this opportunity to welcome you to our exhibition, "Two Centuries of the Bike". Let’s stroll around the exhibition, shall we?
Although there were a few early efforts back in the 1700s, you didn’t really see many bikes till, say, the 1830s in England. Bikes were a response to the rapid growth of cities early in the 19th century. Cities like London were getting too big to walk across! The early bike
let people travel with less effort than walking
. Plus a bike was a lot cheaper than a horse!
Think of it. No one invented a bike for, what, five thousand years of human history? Why did people do it then? Probably because this was the start of the Machine Age: people wanted machines to do all the work. There were some drawbacks, however. For one thing, there were no pedals. You simply pushed yourself along using your feet. Kind of like today’s skateboard. That meant you went fairly slowly. And uphill, you actually worked harder, pushing that two-wheeler. Plus, the wheels were made of wood covered with metal, as you can see from this model. So the
downside was that the ride was quite uncomfortable
on most roads. Only a few gadget lovers had or used them.
By the 1860s, though, improvements were being made
. As you can see from this specimen, metal frames had become the rule. They’re more durable than wood, and they don’t warp in the rain.
The biggest improvement, however, was the development of the chain and sprocket system. They are connected
. This meant you did not push the bike. You used pedals just like today. You had to try harder to balance, so it took some practice to figure out how to use the pedals.
But it made the ride so much easier
. As a result,
the good thing was that you could ride a lot more smoothly and with very little effort
.
By the 1880s, another big change was the use of rubber wheels
. These became pretty common at that time. Though the first ones were solid rubber, the ride was a good deal more comfortable than the old iron and wood system. This is a big consideration because the faster you go, the more you feel every bump. Air-filled tyres-’pneumatic tyres’ —didn’t really come into use till around the year 1900, as you can see from this exhibition over here. That made the ride even more comfortable.
So, by 1890 or so, people were going a lot faster and a lot more smoothly. There was one problem when you were going quickly and comfortably: ’OH NO! HOW DO I STOP?’ Yes, we all laugh now. But for a long time, the only way to stop was drag your feet. That didn’t work very well and it would be dangerous if you were going fast. In the crowded cities of those years —New York, Chicago, and so on, you would get killed if you couldn’t stop for, say, a streetcar. Plus look at this bike. The front wheel is nearly a metre and two thirds tall! They made them that way so you could see over people and wagons. But you couldn’t drag your feet. This model is called a ’velocipede’ —a ’speed pedal’. Another characteristic of the bike in this period is that it has two equal-sized wheels, which signalled a big change in bikes.
For with the velocipede, brakes appeared. If you wanted to stop, you just pushed the pedal backwards. Doing that stopped the back wheel of the bike. This technique worked a lot better than dragging your feet or jumping off the high seat there!
This meant that bikes became a great deal safer
. It would have been safer if people wore helmets, but the first bicycle helmet wasn’t invented until years later, and even then it was little more than a leather ballcap. It really wasn’t until the 1970s that the bike helmet was modified to provide some real protection.
Before continuing on to look at developments since the 1890s, let’s say a word more about safety. Everyone knows if you’re going downhill, you can get going dangerously fast. To go more than a hundred kilometres an hour isn’t all that difficult! But even on level ground, it’s easy to go too quickly. On a city street, today’s bicycles can be ridden at a speed of over forty miles an hour, over a short distance. That’s about sixty-four kilometres an hour. Remember you’re on a bike, not in a car. There’s nothing to protect you. People are killed in single-bicycle accidents every day, just from hitting the road.
A good rule to remember is if you’re going faster than the cars, slow down. And please wear a helmet. Nearly one quarter of the epilepsy cases come from head injuries in accidents on bikes and motorcycles. I didn’t mean to scare you, but safety is everyone’s business.
What? Now that’s a good question. Why are today’s bikes so much faster? Well, it’s not just that today’s athletes are faster. The answer is partly mechanical. If you look closely here, at the back wheel you’ll see a number of gears.
Changing gears is what makes those fast speeds possible
. You can shift gears depending on the terrain and how hard you wish to pedal.
So you can put it on a higher gear for downhill
, and a lower gear for uphill travel to make it easier to climb that slope.
You’ll notice this gear-shifting mechanism is attached at the back wheel
, and when the rider shifts on the handlebar gear shifter, the chain moves to the appropriate sprocket. And, speaking of changing gears, let’s look over here at our "Tour de France" exhibit...
选项
答案
uncomfortable
解析
本题询问自行车的缺点。录音原文中指出缺点(downside)是在很多路上,骑车非常不舒服。downside是表格栏名Disadvantage的同义替换,故空格处可直接填入uncomfortable。
转载请注明原文地址:https://www.kaotiyun.com/show/ThnD777K
本试题收录于:
雅思听力题库雅思(IELTS)分类
0
雅思听力
雅思(IELTS)
相关试题推荐
下列给定程序中,函数fun的功能是:求SS所指字符串数组中长度最短的字符串所在的行下标,作为函数值返回,并把其串长放在形参n所指的变量中。ss所指字符串数组中共有M个字符串,且串长小于N。请在程序的下划线处填入正确的内容并将下划线删除,使程序得出正确的结果
给定程序中,函数fun的功能是:计算出形参s所指字符串中包含的单词个数,作为函数值返回。为便于统计,规定各单词之间用空格隔开。例如,形参s所指的字符串为:ThisisaClanguageprogram.,函数的返回值为6。请在程
请使用VC6或使用【答题】菜单打开考生文件夹proj3下的工程文件proj3。本题创建一个小型字符串类,字符串长度不超过100。程序文件包括proj3.h、proj3.cpp、writeToFile.obj。补充完成重载赋值运算符函数,完成深复制功能。屏
考生文件夹下有一个数据库文件“samp2.accdb”,其中存在已经设计好的表对象“tCollect”、“tpress”和“tType”,请按以下要求完成设计:创建一个查询,查找收藏品中CD盘最高价格和最低价格信息并输出,标题显示为“v_Max”和“v
-Theinterlocutorgivesyouandyourpartneralistoftopics.Bothofyouneedtochooseonetodiscusstogether.Theinterloc
Severaldaysago,Icameacrossastrangerinthestreetwhostoppedandaskedmedirections.I【C1】________toshowhimthewayt
Severaldaysago,Icameacrossastrangerinthestreetwhostoppedandaskedmedirections.I【C1】________toshowhimthewayt
Whatdoestheman’scompanydo?
WhatrulesapplytotakingdifferentobjectstotheCentre?AYouMUSTtakethis.BYouCANtakethis,ifyouwish.CYou
PASSAGEONE(1)OnJuly7th,IwastravelinginLondon.IwashavingbreakfastatahotelverynearLiverpoolStreetStation
随机试题
人民检察院以王某涉嫌伤害案提起公诉,人民法院审理后认为起诉指控的事实清楚,证据确实、充分,但根据案件审理情况,应当认定王某构成故意伤害罪,而非人民检察院指控的故意杀人罪。那么,人民法院应当如何处理?
护士为不孕妇女介绍易受孕的时间,下列哪项正确()
已办理检验检疫手续的出口货物,因故需变更输入国家或地区的应重新报检。( )
我国实行联合缉私、统一处理、综合治理的缉私体制,海关在打击走私中处于主导地位并负责与有关部门的执法协调工作。
在探索战略与结构的关系方面,钱德勒在其经典著作《战略和结构》中,首次提出组织结构服从战略的理论。下列说法中,属于该理论观点的有()。
假如你生活在第二次工业革命时期,你不可能享受到的生活是用电脑上网。()
下边四个图形中,只有一个是由左边的四个图形拼合(只能通过上、下、左、右平移)而成的,请把它找出来:
下列关于赠与合同的说法,正确的有
WritingaResearchPaperI.ResearchPaperandOrdinaryEssayA.Similarityin【T1】________:
【B1】【B15】
最新回复
(
0
)