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
Look at the ten statements for this part. You will hear a man talking about "The Wright Brothers ". Decide whether you t
Look at the ten statements for this part. You will hear a man talking about "The Wright Brothers ". Decide whether you t
admin
2019-01-04
47
问题
Look at the ten statements for this part.
You will hear a man talking about "The Wright Brothers ".
Decide whether you think each statement is right(R), wrong(W)or not mentioned(NM).
The Wrights spent a lot of money on the first full-size glider.
Look at the ten statements for this part.
You will hear a man talking about the Wright Brothers.
Decide whether you think each statement is right(R), wrong(W)or not mentioned(NM).
In 1899, the Wright Brothers designed their first aircraft: a small, biplane glider. The Wright Brothers spent a great deal of time observing birds in flight. They noticed that birds soared into the wind and that the air flowing over the curved surface of their wings created lift. Birds change the shape of their wings to turn and maneuver. They believed that they could use this technique to obtain roll control by warping, or changing the shape, of a portion of the wing.
Over the next three years, Wilbur and his brother Orville designed a series of gliders which were flown in both unmanned and piloted flights. They recognized that control of the flying aircraft would be the most crucial and hardest problem to solve.
Following a successful glider test, the Wrights built and tested a full-size glider. In 1900, the Wrights successfully tested their new 50-pound biplane glider in both unmanned and piloted flights. In fact, it was the first piloted glider. Based upon the results, the Wright Brothers planned to refine the controls and landing gear, and build a bigger glider.
In 1901, the Wright Brothers flew the largest glider ever flown. Many problems occurred. The Wrights reviewed their test results and decided to build a wind tunnel to test a variety of wing shapes and their effect on lift. Based upon these tests, they planned to design a new glider with a 32-foot wingspan and a tail to help stabilize it.
During 1902, the brothers flew numerous test glides using their new glider. With successful glides to verify their wind tunnel tests, the inventors planned to build a powered aircraft. After months of studying how propellers work the Wright Brothers designed a motor and a new aircraft. The craft weighed 700 pounds and came to be known as the Flyer.
After two attempts to fly this machine, one of which resulted in a minor crash, Orville Wright took the Flyer for a 12-second, sustained flight on December 17,1903. This was the first successful, powered, piloted flight in history.
In 1904, the first flight lasting more than five minutes took place on November 9. The Flyer II was flown by Wilbur Wright.
That is the end of Part 3. You now have 20 seconds to copy your answers onto the Answer Sheet.
选项
A、Right
B、Wrong
C、Not Mentioned
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/E22d777K
本试题收录于:
BFT听力题库国际化人才外语考试(BFT)分类
0
BFT听力
国际化人才外语考试(BFT)
相关试题推荐
Writeaboutthefollowingtopic:Technologygivesyoungpeopletodayknowledgeandpowerthattheyhaveneverhadbefore.Th
Readthefollowingtextanddecidewhichanswerbestfitseachspace.Forquestions26-45,markoneletterA,B,CorDony
Readthefollowingtextanddecidewhichanswerbestfitseachspace.Forquestions26-45,markoneletterA,B,CorDony
Readthearticlebelow.Choosethebestsentencefromthelistonthenextpagetofilleachofthegaps.Foreachgap(1
Readthearticlebelow.Choosethebestsentencefromthelistonthenextpagetofilleachofthegaps.Foreachgap(1
Readthefollowingpassageanddecidewhichanswerbestfitseachspace.Forquestions26~45,markoneletterA,B,CorDo
Readthefollowingpassageanddecidewhichanswerbestfitseachspace.Forquestions26~45,markoneletterA,B,CorDo
Readthefollowingpassageanddecidewhichanswerbestfitseachspace.Forquestions26~45,markoneletterA,B,CorDo
NolongerdomostofEurope’sundergraduateswanttodirtytheirhandsproducingthingsorprovidingservicestocustomers.【R1】_
随机试题
下列关于合同所附的生效期限与合同中的履行期限的表述正确的是()
瘀血头痛的发病机制为
软组织中出现骨和软骨组织,应考虑是
某机械设备安装工程项目,其分包商在施工过程中,由于操作人员未按操作规程操作机械设备,发生了意外伤亡事故。伤亡事故发生后,项目承包商立即启动了安全生产事故应急救援预案,总包和分包单位根据预案的组织分工立即开始了工作。问题:伤亡事故按其严重程度可
当存在下列事项时通常表明存在较高的验资风险()。
陈列展览的主题和内容不适宜未成年人的,博物馆不得接纳未成年人。()
如果已经造成误机(车、船)事故发生,导游人员和旅行社应该做好事故补救工作,使损失和影响降到最低程度。导游人员要尽快与机场(车站、码头)调度室或者有关部门联系,争取让全体旅游者尽快改乘后续班机(车、船)离开本站,或与旅游者协商采取包机(加挂车厢)或改乘其他交
100人参加7项活动,已知每个人只参加一项活动,而且每项活动参加的人数都不一样。那么,参加人数第四多的活动最多有几人参加?
2013年1—10月,全国汽车商品累计进出口总额为1307.15亿美元,同比增长2.16%,同比年内首次呈现增长。其中:进口金额664.72亿美元,同比增长0.18%,结束了9月下降趋势;出口金额642.43亿美元,同比增长4.29%,增幅较前9月有所提升
假设线性表的长度为n,则在最坏情况下,冒泡排序需要的比较次数为
最新回复
(
0
)