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
2018-05-13
58
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 wind tunnel was used to test the effects of wing shapes on lift.
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
A
解析
转载请注明原文地址:https://kaotiyun.com/show/Go2d777K
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
JohnWilliams,personneldirectorofacompany,receivesanapplicationfromJackSmithapplyingforapositioninthecompanyb
Readthefollowingletterandcompletethegiveninformationform.Writeaword,phraseornumberinthespaces1-5.De
JohnWilliams,PersonnelDirectorofacompany,receivesanapplicationfromJackSmithapplyingforapositioninthecompanyb
Youhaveapart-timejobinabookshop.Themanagerwantstomaketheshopmorepopularamongyoungpeopleandasksyoutowrite
Readthefollowingtextanddecidewhichanswerbestfitseachspace.Forquestions26-45,markoneletterA,B,CorDony
Reebokexecutivesdonotliketoheartheirstylishathleticshoescalled"footwearforyuppies".TheycontendthatReebokshoes
Experimentshaveshownthatinselectingpersonnelforajob,interviewingisatbestahindrance,andmayevencauseharm.Thes
RECORDEDMESSAGE(Questions5-8)MessagefromTed-TradeFairNew【L5】______isverypopular.Mostorderstakenfor【L6】___
MESSAGEForattendantsfromour【L5】,therewillbea【L6】______%discountontheirconferenceregistrationfee,whichcoverslunc
CONVERSATION2(Questions5-8)DiscountsforGymCoursesWehavediscountsfor【L5】______students.For
随机试题
G-菌的细胞壁是由__________、___________、_________和____________等多种成分组成,其中______________是细菌的内毒素。
如果企业速动比率很小,则下列结论成立的是()
A、血细菌培养+药敏B、耻骨上穿刺吸取尿样作分析C、取中段尿作尿样分析D、导尿取样作分析E、膀胱镜检查并取尿样作分析30岁,女性,已婚,疑患尿路感染,需取尿样作分析,应采取哪种方法取尿样_____
新生儿,出生3天,进行卡介苗的接种,其正确的部位及方法是
在八脉交会穴中,通任脉的是:在八脉交会穴中,通督脉的是:
发绀是由于血液中_______所致。
下列项目免征营业税的有()。
侵犯知识产权罪的犯罪客体方面表现为经得或未经他人同意,擅自侵犯他人知识产权的行为。()
在成绩中要查找成绩≥80且成绩≤90的学生,正确的条件表达式是
Thepoorlittlegirlwastiredandhungryintheforest(森林).Shewalkedthroughtheforest,hopingtofindsomethingtoeatbec
最新回复
(
0
)