首页
登录
职称英语
[originaltext] For centuries men dreamed of achieving vertical flight, The a
[originaltext] For centuries men dreamed of achieving vertical flight, The a
游客
2024-02-14
19
管理
问题
For centuries men dreamed of achieving vertical flight, 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 the airliners of today do. 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 uses: deliver people across town, fly to and from airports, assist in rescue work, and aid in the search for missing or wanted persons.
选项
A、Helicopters have only been worked on by man since 1940.
B、Chinese children were the first to achieve flight in helicopters.
C、Helicopters were considered more dangerous than the early airplanes.
D、Some people thought they would become widely used by average individuals.
答案
D
解析
What is said about the development of the helicopter?
转载请注明原文地址:https://tihaiku.com/zcyy/3449111.html
相关试题推荐
[originaltext]W:EnglishLanguageCenter.HowmayIhelpyou?M:Yes.I’mcalli
[originaltext]W:EnglishLanguageCenter.HowmayIhelpyou?M:Yes.I’mcalli
[originaltext]W:Hello.Mr.Summerfield.Howareyoutoday?M:Verywell.Thank
[originaltext]W:Hello.Mr.Summerfield.Howareyoutoday?M:Verywell.Thank
[originaltext]M:I’dliketoorderpieandicecreamfordessert.Wouldyouwan
[originaltext]M:I’dliketoorderpieandicecreamfordessert.Wouldyouwan
[originaltext]M:I’dliketoorderpieandicecreamfordessert.Wouldyouwan
[originaltext]Withtheintroductionofradio,newspaperpublisherswondered
[originaltext]Withtheintroductionofradio,newspaperpublisherswondered
[originaltext]Withtheintroductionofradio,newspaperpublisherswondered
随机试题
Dailynewspaperhasaneditorialpage.Hereopinionisexpressedoneventsa
Overathirdofthepopulationwasestimated______(没有机会享受医疗保健服务).tohavenoa
如果M和N被6除得到的余数分别为3和5,那么下面哪一个不可能为M+N的值?A、152B、1082C、32D、18E、14D假设M=6k+3,N=6p+
Reportersandphotographersaliketookgreat______attherudewaytheactorbeha
[originaltext]M:Doesthismusicbotheryourstudying,Pam?W:ActuallyI’mnot
[originaltext]W:Goodmorning.ComplaintsDepartment.M:Yes.I’dliketospeak
下列各句中,有语病的一项是( )A.士者国之宝,人才尤其是高端人才,各地都争相
女性,59岁。上腹包块伴腹胀1个月,无腹痛、无发热。2月前曾患急性胰腺炎。查体:
患者男性,65岁。冠心病3年,近半年出现明显的情绪低落,兴趣感缺乏,自诉记忆力减
关于氨苄西林的叙述,下列哪项是错误的A.对伤寒杆菌无效 B.耐酸,可口服 C
最新回复
(
0
)