首页
登录
职称英语
(1) Many great inventions are greeted with ridicule and disbelief. The inven
(1) Many great inventions are greeted with ridicule and disbelief. The inven
游客
2024-08-25
35
管理
问题
(1) 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.
(2) 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.
(3) 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.
(4) 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 Because of their efforts, the old tables were repealed in time and replaced by the first reliable figures for air pressure on curved surfaces.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.
(5) 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. [br] Lilienthal’s idea about controlling airborne vehicles was________the wrights.
选项
A、proven wrong by
B、opposite to the ideas of
C、disliked by
D、accepted by
答案
C
解析
细节题。“Lilienthal”是关键词,出现在文中第二、三段。根据第三段第二句话:This idea was repellent to the Wright brothers…可知,选项C正确。
转载请注明原文地址:http://tihaiku.com/zcyy/3734983.html
相关试题推荐
(1)Manygreatinventionsaregreetedwithridiculeanddisbelief.Theinven
(1)Manygreatinventionsaregreetedwithridiculeanddisbelief.Theinven
(1)Manygreatinventionsaregreetedwithridiculeanddisbelief.Theinven
(1)Manygreatinventionsaregreetedwithridiculeanddisbelief.Theinven
随机试题
Readthearticlebelowaboutculturalawarenessinbusiness.Choosethebestwo
Thereisacloserrelationshipbetweenmoralsandarchitectureandinterior
3岁小儿,发热3天,有头痛,呕吐。查:皮肤有瘀点、瘀斑,脑膜刺激症状(+),腰穿
女,49岁。干咳两个月,近2周左侧胸痛、气急、胸闷。胸片示左上叶前段2×2.5c
下列性状特征中与药材所含化学成分有关的是A.形状B.色泽C.大小D.表面特征E.
相对于所治疾病的寒热性质而言的中药性能是A.升降浮沉B.五味C.四气D.归经E.
高钾血症心律失常时首要措施是静脉给予A.5%碳酸氢钠 B.10%葡萄糖酸钙
皮质醇增多症病人的饮食应满足A:高糖、低蛋白、高脂、高维生素、低钾、高钠 B:
下列不可以作为保证人的是()。A.经商业银行认可的企业法人的职能部门 B
李某是乙企业销售人员,拥有企业的空白合同书,后李某因违规被乙企业除名,但空白合同
最新回复
(
0
)