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
143
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
Forthispart,youareallowed30minutestowriteacompositiononthetopicAnUnforgettableTest.Youshouldwriteatleast1
InhistoricStoneTown,"wazee"______.Theword"shot"(Para5)ismostcloselyrelatedtotheword(s)______.
A、Thewomanisthinkingaboutapplyingforajob.B、Theyarediscussingamovie.C、Theyareplanningasurprisepartyforafrie
A、Once.B、Twotimes.C、Threetimes.D、Severaltimes.DHowoftenshouldMuslimswashthemselvesaday?
A、$1.00.B、$5.00.C、$0.75.D、$3.25.C根据四个选项,推测对话的内容与数字相关。因此听的过程中应该进行纪录,以便计算,5-3.25-1=0.75,因此答案是C。
A、Bywritingapersonalcheck.B、Bychangingthemtotheirpersonalaccount.C、Bypayingincash.D、Byusingastorecreditcard
A、Grades.B、Privacy.C、Sports.D、Money.DWhatdoesthemanseemtobeconcernedabout?推理题。从男士的话Thinkofthemoneyyou’dsave可以判
WhatdidChinesepeopleusuallyhaveforbreakfast15yearsago?WhichofthefollowingstatementsisTRUEaccordingtothepas
GooglealreadyhasawindowintooursoulsthroughourInternetsearchesanditnowbasinsightintoourailingbodiestoo.The
OriginsofaPlagueSomegaybashersbelieveitisGod’swayofpunishinghomosexuals(同性恋).SomeAfricanssuspectitisjust
随机试题
Nobodyhastaughthimhowtoactwellonthestage.
Whenpeoplearestruckbylightening,theyfalltothegroundasthoughtheywerestruckbyasevereblowtothehead.Afterthe
建设项目竣工环境保护验收是指建设项目竣工后,环境保护行政主管部门根据《建设项目竣工环境保护验收管理办法》规定,依据环境保护验收监测或调查结果,并通过()等手段,考核该建设项目是否达到环境保护要求的活动。
跟单员在处理样品时应注意的事项是()
某公司债券面值100元,票面利率为8%,每年付息,到期期限10年。如果将债券的利息单独作为证券出手,并且投资者要求的收益率为9%,那么该“利息证券”的发行价格为______。
张女士为A市甲超市财务管理人员,她从2014年1月份开始建立家庭消费电子账,6月份从甲超市购买了下列商品:(1)粉底液一盒,支出400元。(2)白酒1000克,支出640元。(3)食品支出1010元,其中:橄榄油2500克,支出400元;
马克思主义政治经济学的研究对象是社会生产力及其发展规律。
Myfive-year-olddaughterknewexactlywhatshewantedforChristmasof1977,andtoldmeso.Yes,shestillwouldlikethepink
Wheredoyoureallycomefrom?Andhowdidyouget(1)whereyoulivetoday?DNAstudiessuggestthatallhumanstoday(2)from
A、Callforadoctor.B、Buysomemedicine.C、LookforJack.D、SendJacktoschool.A根据对话中男士所说“Sure,I’lldoitrightaway.”可知男士马上要
最新回复
(
0
)