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
70
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 Because of their efforts, the old tables were repealed in time and replaced by the first reliable figures for air pressure on curved surfaces.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://www.kaotiyun.com/show/6t1K777K
0
专业英语四级
相关试题推荐
IsContinuingEdforYou?Continuingeducationisimportantforeveryonenow,inallfields.Almostassoonasyou’vecomp
IsContinuingEdforYou?Continuingeducationisimportantforeveryonenow,inallfields.Almostassoonasyou’vecomp
OnlinePriceWarsE-commercecustomersfeelthatover80percentoftheirdecisiontopurchaseornotresideinissuesbeyo
CoffeeCoffeeprobablyderivesitsnamefromtheArabic"gahwah",althoughsomeetymologistsconnectitwiththenameKaffa,
______toldbythedoctortostopsmoking,Mr.Smithcarriedneithermatchesnorcigarettes.
Neitherhiscolleaguesnorhissupervisor______aboutwhyhequithisjob.
Although______Spanish,heattendedthecourse.
Althoughthemodellooksgoodonthesurface,itwillnotbearclose______.
随机试题
对于说明语句int*dl,a[100];后续程序不允许出现的语句是()。
药物消除的零级动力学是指:
糖皮质激素隔日清晨一次给药法可避免
下注于气街,并下行于足的气是()
A、外感风寒,内伤湿滞的感冒B、感受秽恶痰浊之邪所致的中暑C、暑湿蕴结所致的湿温D、中暑发热、气津两伤E、暑邪挟湿所致的发热身倦清暑益气丸的主治是
由于保证合同是依附于主合同的从属合同,因此,当破产企业作为债务人与债权人签订的和解协议规定破产企业的债务一律减免20%时,债务人的保证人也应按和解协议的约定相应调整其应承担的保证责任。()
“知屋漏者在宇下,知政失者在草野”。是的,如果主政者井蛙观天,孤陋寡闻,视世情必__________.察时势则__________,一不小心就会压抑活力,积攒怨气。填入划横线部分最恰当的一项是:
所有人可以在所有物上设定抵押权体现了所有权的特征是()。
BecausetheEarth’scrustismoresolidthereandthusbetterabletotransmitshockwaves,anearthquakeofagivenmagnitudet
财政政策是指()。
最新回复
(
0
)