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
2023-10-22
57
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 Because of their efforts, the old tables were repealed in time and replaced by the first reliable figures for air pressure on curved surfaces.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:https://tihaiku.com/zcyy/3120413.html
相关试题推荐
(1)Manygreatinventionsaregreetedwithridiculeanddisbelief.Theinven
(1)Manygreatinventionsaregreetedwithridiculeanddisbelief.Theinven
(1)Manygreatinventionsaregreetedwithridiculeanddisbelief.Theinven
(1)Manygreatinventionsaregreetedwithridiculeanddisbelief.Theinven
随机试题
ThemaindifferencebetweenChineseandWestern【T1】______isthatunlikethe
男,56岁,因牙周病全部拔除上下颌余留牙,已5个月余。缺牙后,咀嚼功能遭到破坏并
孕妇不宜用的H1受体阻断药是A、苯海拉明 B、布可立嗪 C、美克咯嗪 D、
2007年中部六省城镇单位就业人员平均工资的中位数为()。A.20
居民消费价格指数能够反映()。A.城乡商品零售价格的变动趋势 B.城乡居民购买
(2016年真题)下列税收中,按年计算、分期缴纳的是()。A.契税 B.
苏俄实行的战时共产主义政策() ①是在残酷战争条件下的非常措施②目的是集中财力
如果运价变动1个百分点,引起运输需求量的变动不足1个百分点,说明该运输需求()。
甲公司基本生产车间生产X和Y两种产品,供电和锅炉两个辅助生产车间分别为
下列选项中,必须有城建档案管理部门参加的预验收和验收的工程项目有()。A.国家重
最新回复
(
0
)