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
外语
For centuries man dreamed of achieving vertical flight. In 400 A.D. Chinese children 【S1】______ with a fan-like toy that spun up
For centuries man dreamed of achieving vertical flight. In 400 A.D. Chinese children 【S1】______ with a fan-like toy that spun up
admin
2010-03-26
75
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
【S5】
选项
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/Swk7777K
0
大学英语四级
相关试题推荐
HealthCareandEpidemicsEveryonesuffersfromdiseaseatsometimeoranother.However,millionsofpeoplearoundtheworl
Peoplewithdepressiongotoseetheirdoctorsmoreoftenthanpeoplesufferingfromphysicalproblems.Childrenandadolescent
A、35.B、25.C、45D、30C此次对话仍然和数字相关。根据计算,答案为C。
A、Shehasn’tbeenwelllately.B、ShefeelsunhappywithoutaTV.C、Shewantsittobefixedbyanexpert.D、Shewantshimtorep
A、Health.B、Industry.C、cleanair.D、Purewater.BAccordingtothespeaker,whatdoesmanvaluemostamongthefollowing?细节题。短文中
A、Bywritingapersonalcheck.B、Bychangingthemtotheirpersonalaccount.C、Bypayingincash.D、Byusingastorecreditcard
A、Thepersonnelmanagershouldbefiredforinefficiency.B、Afewengineersshouldbeemployedtomodernizethefactory.C、Thee
A、Hersubject’shome.B、Hersubject’ssocialstatus.C、Hersubject’spersonality.D、Hersubject’sroleinhistory.C[听力原文]What
A、Shewasn’treallystudying.B、Shehadn’tfinishedwritingherarticles.C、Shehadfurnishedherhouse.D、Shecouldwritebeaut
A、Beingconfident.B、Lookingpretty.C、Havinghotelexperience.D、Havingaquickmind.C
随机试题
试述诋毁商誉行为的构成。
语颤增强是由于【】
栀子的别名是
1966年联合国教科文组织和国际劳工组织首次以官方文件形式对教师专业化作出了明确说明的文件是()。
小瑞经常因为没有按时完成学校的作业被父亲暴打,班主任在与其父亲多次沟通无效的情况下,可以帮助小瑞向法院申请撤销其父亲的监护人资格。()
H市某研究所主要研究特种材料。在计划经济时期,该所承担了多项国家下达的科研攻关任务,取得了十分突出的成就,同时形成了良好的协同攻关气氛和机制,造就了一批优秀的技术人才。但改革以后,国家任务逐渐减少,直到目前完全取消,因而该所取得的成果也随之减少。为了扭转目
局部_______透明性处于分配模式与局部概念模式之间,它使用户在编写应用程序时不但要了解全局数据的分片情况,还要了解各片段的副本复制情况及各片断和它们副本的场地位置分配情况,但是不需要了解各场地上数据库的数据模型。
某系统结构图如下图所示(图中n≥5),该系统结构图的宽度是
Thecostofplantandequipmentincludesallexpendituresreasonableandnecessaryinacquringtheassetandplacingitinapos
FromthepassageweknowinAmericatheprincipleofcustomerserviceisto______.WhydopeopleintheUSAfeelshoppingisa
最新回复
(
0
)