首页
登录
职称英语
For centuries man dreamed of achieving vertical flight. In 400 A.D. Chinese
For centuries man dreamed of achieving vertical flight. In 400 A.D. Chinese
游客
2024-03-01
28
管理
问题
For centuries man dreamed of achieving vertical flight. In 400 A.D. Chinese children 【S1】______ with a fan-like toy that spun upwards and fell back to earth as rotation ceased. Leonardo da Vinci conceived the first mechanical apparatus, called a "Helix", which could carry a man straight up, but this was only a 【S2】______ and was never tested.
The ancient dream was 【S3】______ realized in 1940 when a Russian immigrant, an aeronautical 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 【S4】______ . That vehicle was called a helicopter.
Imaginations were fired. Men dreamed of commuting to work in their own personal helicopter. Every man would have one in his backyard. People anticipated that vertical flight transports would carry millions of 【S5】______ as do the airliners of today. Such 【S6】______ expectations were not fulfilled.
The helicopter has now become an extremely versatile machine. It excels in military missions, carrying troops, guns and strategic instruments where other aircraft can not go. Corporations use them 【S7】______ airborne offices, many metropolitan areas use them in police work, construction and logging companies 【S8】______ 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 【S9】______ mission to a hard-to-get-to place is a likely task for a 【S10】______ . Among their other multitude of uses, they deliver people across town, fly to and from airports, assist in rescue work, and aid in the search for missing or wanted persons.
A) employ B) passengers C) as D) helicopter
E) comfortable F) earth G) sufficient H) urgent
I) disliked J) played K) finally L) into
M) expected N) fantastic O) design [br] 【S3】
选项
答案
K
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3495281.html
相关试题推荐
TheChineseNewYearisabigtraditionalholidayinSingapore.OnitsEve,whil
WhatdidChinesepeopleusuallyhaveforbreakfast15yearsago?[br]Whichoft
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
随机试题
假设一揽子股票组合与香港恒生指数构成完全对应,该组合的市场价值为100万元,假设市场年利率为6%,且预计1个月后可收到1万元的现金红利,则该股票组合3个月的合理
Workingouttomusiccanimprovethecoordinationofyourmindandbody,【C1】
[originaltext]M:Iwanttogohome.Thefilmisnotinteresting.W:Gohome?I
Asthepaceoflifecontinuestoincrease,wearefastlosingtheartofrel
E-mailImaginebeingabletosendaletter
Musicinhighereducation:whatisitworth?[A]Musichasfoun
凡是国际民航组织成员国的任一()航空运输企业,经其政府许可都可以成为国际航空
下列关于玻璃幕墙,表述正确的有( )。A.玻璃幕墙是一种新型墙体,主要用于高层办
为防范“假个贷”,一线经办人员应严格执行贷款准入条件,审查内容包括()。A.各
下列关于组织论的说法正确的是( )。A.组织结构模式是一种相对静态的组织关系
最新回复
(
0
)