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
27
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] 【S4】
选项
答案
F
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3495282.html
相关试题推荐
WhatdidChinesepeopleusuallyhaveforbreakfast15yearsago?[br]Whatisth
WhatdidChinesepeopleusuallyhaveforbreakfast15yearsago?[br]According
ForamomentitfeltlikebeinginsomepartofChina.【B1】,Chinesesnacks,l
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
WithmoreChinesechildrencomingtostudyinSingapore,auniquecommunityofw
随机试题
Somedayastrangerwillreadyoure-mailwithoutyourpermissionorscanthe
10mg/日吗啡,连用一个月下述哪种作用不会产生耐受性A.镇痛 B.镇咳
最早明确指出胁痛与肝胆病变相关的医籍是A.《难经》 B.《伤寒杂病论》 C.
(2015年真题)以下关于风险的表述错误的是()。A.风险分商业风险、操作
MIC的中文含义为A.最低杀菌浓度 B.抗生素后效应 C.抗菌谱 D.最低
以下关于要素饮食的概念哪项不正确A:是一种化学精制食物 B:只需要经小肠消化
为防止存在验电死区,有条件时应采取()多点验电的方式进行验电三相$;$同相$
湿痰的特点是A.痰白清稀量多 B.痰黄黏稠有块 C.痰少而黏,难咯 D.痰
某工程,实施过程中发生如下事件: 事件1:开工前,项目监理机构审查施工单位
施工导流标准包括划分导流建筑物级别,确定相应的洪水标准,还包括()。A.坝体施工
最新回复
(
0
)