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
考研
For centuries men dreamed of achieving vertical flight. In 400 A.D. Chinese children played with a fan-like toy that spun upward
For centuries men dreamed of achieving vertical flight. In 400 A.D. Chinese children played with a fan-like toy that spun upward
admin
2012-08-24
59
问题
For centuries men dreamed of achieving vertical flight. In 400 A.D. Chinese children played with a fan-like toy that spun upwards and fell back to earth as rotation ceased. Leonardo da Vinci conceive the first mechanical apparatus, called a "Helix," which could carry man straight up, but was only a design and was never tested.
The ancient-dream was finally realized in 1940 when a Russian engineer piloted a strange looking craft of steel tubing with a rotating fan on top. It rose awkwardly and vertically into the air from a standing start, hovered a few feet above the ground, went sideways and backwards, and then settled back to earth. The vehicle was called a helicopter.
Imaginations were fired. Men dreamed of going to work in their own personal helicopters. People anticipate that vertical flight transports would carry millions of passengers as do the airliners of today. Such fantastic expectations were not fulfilled.
The helicopter has now become an extremely useful machine. It excels in military missions, carrying troops, guns and strategic instruments where other aircraft cannot go. Corporations use them as airborne offices, many metropolitan areas use them in police work, construction and logging companies employ them in various advantageous ways, engineers use them for site selection and surveying, and oil companies use them as the best way to make offshore and remote work stations accessible to crews and supplies. Any urgent mission to a hard-to-get-to place is a likely task for a helicopter. Among their other multitude of used: deliver people across town, fly to and from airports, assist in rescue work, and aid in the search for missing or wanted persons.
Where is the engineer who realized the ancient-dream from?
选项
A、China
B、Italy
C、Canada
D、Russia
答案
D
解析
由第二段第一句可知,这个工程师是俄罗斯人。故答案为D。
转载请注明原文地址:https://kaotiyun.com/show/Mnhi777K
0
在职申硕(同等学力)英语
相关试题推荐
We(cannothardly)expectadolescents(tohaverespect)forthepossessionsofothers(if)theyhavenohopeofattaininganyof
Somepeoplefeelsadaboutglobalizationbecausetheybelieveitwill______ItisimpliedinthepassagethatNikeandCoca-co
Andreaallowedthehitchhikertotakearideinhercar,mainlybecause______Andreasuddenlystoppedthecarbecause______
Man:IsawJohnyesterday.Youknowwhat?Hewasdrivingaluxuriouscar.Woman:Herentedit.Heoftenmakesothersbelievetha
ThesimpleexamplesinParagraphIconveythemessagethat______.Goalshavetobedetailedsothatpeople______.
ManyAmericansharboragrosslydistortedandexaggeratedviewofmostoftheriskssurroundingfood.FergusClydesdale,headof
Man:Peterlooksveryupsetrecently.Woman:Yes.Ithinkthathehasahardenoughjobtomakeendsmeet.Question:Whatdoesthe
Sheactuallypreferredamoregregariousurbanlifestyleandtheculturalattractionsinawarmerclime.
Weallknowtalentedpeoplewhoneverseemtoreachtheirpotential.Thesepeopleoftenhavegreatearlysuccess,thenseemtof
MostAmericanmagazinesandnewspapersreserve60percentoftheirpagesforads.TheNewYorkTimesSundayedition【1】maycontai
随机试题
行政指导的作用有()。
应收账款的管理成本主要包括()
关于色素失禁症,下列叙述错误的是
调节保险市场的核心规律是()
埃里克森人格发展理论认为儿童人格发展的每一阶段都有一种冲突和矛盾所决定的发展危机。比如1218岁阶段的危机冲突是()。
下列各句中,没有语病的一项是()。
公安机关在公共场所管理、道路交通管理、消防管理、危险物品管理、特种行业管理和出入境管理等治安行政管理活动中,为维护社会秩序和公共安全,依法对特定的人、物、事、场所采取的命令、禁止与取缔、许可等行为的权力属于()。
AllSumeriancitiesrecognizedanumberofgodsincommon,includingtheskygod,thelordofstorms,andthemorningandevenin
Wheredidthehorseoriginate?Whatcanbesaidaboutthevarietiesofhorses?
A、Hehasbookedatourwiththeagent.B、HisnephewwantstobookatourwiththeagentC、Hewantstohavesomeadvicefromthe
最新回复
(
0
)