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
29
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] 【S10】
选项
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3495288.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
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
Whatisthepatientsufferingfrom?[br][originaltext]M:Ifyou’lljusthavea
TheAmericanpopulationiscomposedofpeopleofdifferent______backgrounds.A、
PreparingforMoreExpensiveDegreesinEnglandBalancinga
以下测试方法中,不属于典型安全性测试的是()。A.安全功能验证 B.漏洞扫描
根据银监会《贷款风险分类指引》,下列属于不良贷款的有()。A.可疑类贷款
业主(住户)手册由物业管理单位编撰,主要内容包括()。A:验收时间 B:物业
下列选项中,关于次等劳动力市场的说法,错误的是()。A.次等劳动力市场与优
根据《标准施工合同》,关于监理人的合同管理地位和职责的说法,正确的有()A.监
A.不能避免医疗费用的代际转移 B.社会公平性好 C.管理形式灵活多样 D
最新回复
(
0
)