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
Great Inventions There are some things we use every day. Can you imagine a world without zippers(拉链) to fasten clothing? Ha
Great Inventions There are some things we use every day. Can you imagine a world without zippers(拉链) to fasten clothing? Ha
admin
2010-03-26
52
问题
Great Inventions
There are some things we use every day. Can you imagine a world without zippers(拉链) to fasten clothing? Have you ever wondered about the layout of the keyboard of a typewriter, which we see every day on the computer? These are just two of the many inventions which have made our lives easier. Maybe that’s why we don’t think about them very much!
The zipper
Whatever did we do before the invention of the zipper?
In 1893 the world’s first zipper was produced in Chicago. Although the inventor claimed that it was a reliable fastening for clothing, this was not the case. The Chicago zipper sprang open without warning, or jammed shut, and it swiftly lost popularity. Twenty years later a Swedish-born engineer called Sundback solved the problem. He attached tiny cups to the backs of the interlocking teeth, and this meant that the teeth could be enmeshed (使陷入) more firmly and reliably.
At first zippers were made of metal. They were heavy, and if they got stuck it was difficult to free them. Then came nylon zippers which were lighter and easier to use, and had smaller teeth. The fashion industry liked the new zippers far better because they did not distort the line of the garment or weigh down light fabrics. They were also easier for the machinists to fit into the garment.
Meanwhile a new fastening agent made its appearance at the end of the twentieth century: Velcro (维可牢尼龙褡链扣). Velcro is another product made from nylon. Nylon is a very tough synthetic fiber first developed in the 1930s, and bearing a name to remind the hearer of the two places where it was developed: NY for New York and LON for London. It is strong and durable.
Velcro is used on clothing, luggage and footwear. It is quick and easy to fasten and unfasten, and has taken a large part of the zipper’s share of the market. It is also used in ways a zipper cannot be used—for instance as an easily changed fastening on plaster casts, and to hold furnishing fabrics in position.
The typewriter and the keyboard
The keyboard of the modern typewriter is laid out in a most odd fashion. Why would anyone place the letters on the left side of the top row of the keyboard in the order Q W E R T Y? The answer is simple: to slow the typist down. But first, let’s consider the history of the typewriter itself.
In the 1860’s a newspaper editor called Christopher Sholes lived in Milwaukee, USA. Sholes invented the first of the modern typewriters, although there had been patents for typewriter-like machines as early as 1714, when Queen Anne of England granted a patent to a man called Henry Mill for a machine which would make marks on paper "so neat and exact as not to be distinguished from print." In 1829, across the Atlantic in Detroit, USA, William Austin Burt took out a patent on a typewriter-like machine, four years before the French inventor Xavier Projean produced his machine designed to record words at a speed comparable to someone writing with a pen.
So the typewriter was not a new idea, although there had not been a successful realization of the idea before Christopher Sholes’ machine. His typewriter became very popular, and soon people learned to type very quickly—so quickly, in fact, that the keys became tangled (纠缠在一起). On manual typewriters the characters were set on the end of bars which rose to strike the paper when the key was pressed. In the first models, the keys were set alphabetically. When a quick typist tapped out a word like federal, it was very likely that the adjacent e and d keys would become entangled (缠住).
Sholes therefore set about finding ways to slow the typist down. He looked for the letters which were most often used in English, and then placed them far away from each other. For instance, q and u, which are almost always used together in English, are separated by five intervening (介于其间的) letters. The plan worked, and the typist was slowed down a little.
When computers came into use in the latter part of the twentieth century it was suggested that the keyboard should be rationalized. After all, there was no longer any need to avoid clashing manual typewriter keys. One new board included keys which produced letters which frequently occur together in English, like ing and th and ed, so the word thing would take two strokes to write instead of five. Although this made perfect sense, people found it very hard to learn to use a new keyboard, and the idea was dropped. It is unlikely that the keyboard will ever be changed: as we approach the twenty-first century the voice-activated computer, already in an advanced state of development, is becoming more and more accessible (易得到的). It is very likely that we will soon have machines which take dictation as we speak to them, and the keyboard will be used for corrections.
The keyboard of the modern typewriter is arranged in a strange way just to slow down the typing speed.
选项
A、Y
B、N
C、NG
答案
A
解析
从第七段的第三句“The answer is simple:to slow the typist down.”可得出答案是 Y。
转载请注明原文地址:https://kaotiyun.com/show/pck7777K
0
大学英语四级
相关试题推荐
OneoftheorganizersforthissurveyisMTVU,whichis______.Accordingtothesurvey,thebiggestreasonforstudents’stres
A、Hewantstogoshopping.B、Heistootired.C、Heisgoingtoteachaforeignstudent.D、HeisgoingtolearnEnglish.C[听力原文]
A、Shehasn’tcleanedherroomeither.B、Sheleftherroomontimethismorning.C、Shecanhelpthemancleanuphisroom.D、She
Accordingtotheauthor,educationissuretobelimitedtoacertainscopewithouttheuseofmedia.Instructorsfromdifferen
Yourmusclesareworkingtomoveaweightwhenyouare______.Whenyouarestarving,proteinscanalsobebrokendowninto
A、Criticizingothersonbus.B、Amusingpeopleinpubic.C、Enjoyingtalkingtopeople.D、Listeningtopeople’sinpublic.DWhich
PaulineGrossfeltsearedbecauseshethoughtshewoulddieof______.Couplesplanningtohavechildrencantakeprenatalgene
AccordingtoEdDiener,whichofthefollowingcanbemeasuredbytheindexofhappiness?Whensomeoneisnotingoodmood,his
A、Italy.B、England.C、Australia.D、Thailand.A根据对话的开始部分,可知Fiona和Denis正在讨论他们的暑期计划,当Fiona问Denis假期的计划时,Denis说:“I’mgoingtojoina
A、Beforedinner.B、Duringdinner.C、Rightafterdinner.D、ThenextdayA
随机试题
车船的所有人或者管理人未缴纳车船税的,则车船税纳税义务的承担者是()
道德不同于其他社会意识形态的特点是道德具有()。
患者,女性,45岁。晨起刷牙时发现口角漏水,家人发现其右侧口角下垂,右眼裂变大,用力闭眼仍不能闭合。临床检查发现除上述外观表现外,右侧舌前2/3味觉迟钝,同侧舌、颊及口底黏膜较对侧均显无光泽、干燥、听力检查右侧明显较对侧差,Schirmer试验双侧泪液分泌
患儿2个月,男。因生后20天起,进食进水均易吐入院。起病以来食欲好,大小便正常,未经诊治,查血总蛋白45g/L(4.5g/dl),白蛋白25g/L(2.5g/dl)。最易出现的是
设计概算分为几个概算,它们是()。
基金销售机构在销售基金和相关产品的过程中应当坚持()。
中学生人格发展的主要特点有:伴随着生理的逐渐成熟,产生了“独立感”和“成人感”,开始关注________,开始了解、接纳和逐渐掌握更多的行为规范,价值标准,社会角色,并对自己的未来角色进行定位和认同。
.已知函数f(x)满足:f(1)=,4f(x)f(y)=f(x+y)+f(x—y)(x,y∈R),则f(2010)=__________.
设矩阵Am×n的秩为r(A)=m<n,Em为m阶单位矩阵,下列结论中正确的是().
Eventuallytherarergeneswilldisappearandthegenetictypes,______leavingfeweroffspringwillbecome.
最新回复
(
0
)