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
Many great inventions are greeted with ridicule and disbelief. The invention of the airplane was no exception. Although many peo
Many great inventions are greeted with ridicule and disbelief. The invention of the airplane was no exception. Although many peo
admin
2010-11-29
63
问题
Many great inventions are greeted with ridicule and disbelief. The invention of the airplane was no exception. Although many people who heard about the first powered flight on December 17,1903, were excited and impressed, others reacted with peals of laughter. The idea of flying an aircraft was repulsive to some people. Such people called Wilbur and Orville Wright, the inventors of the first flying machine, impulsive fools. Negative reactions, however, did not stop the Wrights. Impelled by their desire to succeed, they continued their experiments in aviation.
Orville and Wilbur Wright had always had a compelling interest in aeronautics and mechanics. As young boys they earned money by making and selling kites and mechanical toys. Later, they designed a newspaper-folding machine, built a printing press, and operated a bicycle-repair shop. In 1896, when they read about the death of Otto Lilienthal, the brother’s interest in flight grew into a compulsion.
Lilienthal, a pioneer in hang-gliding, had controlled his gliders by shifting his body in the desired direction. This idea was repellent to the Wright brothers, however, and they searched for more efficient methods to control the balance of airborne vehicles. In 1900 and 1901, the Wrights tested numerous gliders and developed control techniques. The brothers’ inability to obtain enough lift power for the gliders almost led them to abandon their efforts.
After further study, the Wright brothers concluded that the published tables of air pressure on curved surfaces must be wrong. They set up a wind tunnel and began a series of experiments with model wings. Because of their efforts, the old tables were repealed in time and replaced by the first reliable figures for air pressure on curved surfaces. This work, in turn, made it possible for them to design a machine that would fly. In 1903 the Wrights built their first airplane, which cost less than one thousand dollars. They even designed and built their own source of propulsion — a lightweight gasoline engine. When they started the engine on December 17, the airplane pulsated wildly before taking off. The plane managed to stay aloft for twelve seconds, however, and it flew one hundred twenty feet.
By 1905 the Wrights had perfected the first airplane that could turn, circle, and remain airborne for half an hour at a time. Others had flown in balloons or in hang gliders, but the Wright brothers were the first to build a full-size machine that could fly under its own power. As the contributors of one of the most outstanding engineering achievements in history, the Wright brothers are accurately called the fathers of aviation.
The idea of flying an aircraft was______to some people.
选项
A、boring
B、distasteful
C、exciting
D、needless
答案
B
解析
词汇题。考查的是文中“repulsive”一词的含义。
转载请注明原文地址:https://kaotiyun.com/show/6t1K777K
0
专业英语四级
相关试题推荐
Althoughyouarenewhere,heis______youforthejob.
IsContinuingEdforYou?Continuingeducationisimportantforeveryonenow,inallfields.Almostassoonasyou’vecomp
IsContinuingEdforYou?Continuingeducationisimportantforeveryonenow,inallfields.Almostassoonasyou’vecomp
OnlinePriceWarsE-commercecustomersfeelthatover80percentoftheirdecisiontopurchaseornotresideinissuesbeyo
OnlinePriceWarsE-commercecustomersfeelthatover80percentoftheirdecisiontopurchaseornotresideinissuesbeyo
CoffeeCoffeeprobablyderivesitsnamefromtheArabic"gahwah",althoughsomeetymologistsconnectitwiththenameKaffa,
______toldbythedoctortostopsmoking,Mr.Smithcarriedneithermatchesnorcigarettes.
Neitherhiscolleaguesnorhissupervisor______aboutwhyhequithisjob.
Althoughthefirstpartofthebookiseasy,therest______.
随机试题
哪些是肠套叠经灌肠复位后好转的症状()
国内生产总值是()
下列关于急性胃肠道穿孔摄影的叙述,错误的是
血管紧张素转换酶抑制药(ACEI)的作用特点不包括
某类型的电涌保护器,无电涌出现时为高阻抗,随着电涌电流和电压的增加,阻抗跟着连续变小,通常采用压敏电阻,抑制二极管作为SPD的组件,该SPD属于下列哪种类型?()
公鸡:鸭子:打鸣
根据《宪法》规定,国家主席缺位时,可以继任或者暂时代理主席职位的有()
社会主义初级阶段的基本路线的主要内容是
Astheeconomyweakens,banksareincreasinglysqueezingcustomerswhooverdrawtheirbankaccounts.BankofAmericaandWashing
•Lookatthenotebelow•Youwillhearawomancallingtoinformofdetailsofadelivery.
最新回复
(
0
)