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 men dreamed of achieving vertical flight. In 400 A.D. Chinese children played with a fan-like toy that spun upward
For centuries men dreamed of achieving vertical flight. In 400 A.D. Chinese children played with a fan-like toy that spun upward
admin
2015-06-07
16
问题
For centuries men dreamed of achieving vertical flight. In 400 A.D. Chinese children played with a fan-like toy that spun upwards and fell back to earth as rotation ceased. Leonardo da Vinci con ceive the first mechanical【B1】______,called a "Helix," which could carry man straight up, but was only a design and was never tested.
The ancient-dream was finally realized in 1940 when a Russian engineer piloted a strange look ing craft of steel tubing with a rotating fan【B2】______.It rose awkwardly and verti cally into the air from a standing start,hovered a few feet above the ground,went【B3】______and backwards, and then settled back to earth. The vehicle was called a helicopter.
Imaginations were fired. Men dreamed of going to work in their own personal helicopters. Peo ple anticipated that vertical flight transports would carry millions of passengers as do the airliners of today. Such fantastic expectations were not【B4】______.
The helicopter has now become an extremely useful machine. It【B5】______in military missions, carrying troops, guns and【B6】______ instruments where other air craft cannot go. Corporations use them as airborne offices, many metropolitan areas use them in po lice work, construction and logging companies employ them in various【B7】______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【B8】______crews and supplies. Any urgent mission toa hard-to-get-to placeisa likely task for a helicopter.Among their other【B9】______of use:deliver people across town,fly to and from airports,【B10】______ rescue work, and aid in the search for missing or wanted persons.
【B5】
选项
答案
excels
解析
空格所在句子缺少谓语,根据主语it和前后文的语态,推断此处应填入动词第三人称单数形式。excels意为“擅长”。
转载请注明原文地址:https://kaotiyun.com/show/dFQ7777K
0
大学英语六级
相关试题推荐
A、Themanshouldbepatient.B、Themanismistaken.C、Shemissesherfriend.D、Sheiswaitingforacall.B男士祝贺女士找到了一份新工作,女士说“你一
A、Thingsonsalemaybeworthbuying.B、Thingsonsalearenotworthbuying.C、Thingsonsaleareoutofstyleandseason.D、Thi
Somepeople’searsproducewaxlikebusylittlebees.Thiscanbeaproblemeventhoughearwax(耳垢)appearstoserveanimportant
A、Outsidetheshop.B、Atthebookstore.C、Attheartmuseum.D、Inthestreet.D男士要停下来看看橱窗里的展示,女士说看到了一些书正在出售,要进去看看有没有关于艺术方面的。对话很可
A、Awaytojoinabicyclerace.B、MajorBritishbicycleraces.C、Thecontributionofcyclingtohealth.D、Anannualcyclingeven
A、Themanhasdecidedtoquithiscomputerclass.B、Thewomanwantstogetadegreeinadministration.C、Acomputerdegreeisa
A、Themanthinksthewomaniseasilyinfluencedbyothers.B、Themanthinksthewomanlooksdownonthisexam.C、Thewomanthink
A、Thewomanwillbehappytomeethercousin.B、Thewomanshouldgototheweddingceremony.C、Heplanstogotravelingwiththe
Whetherit’scurledupinthefetalposition,flatonthestomachorstretchedoutacrossthebed,thewaypeoplesleep【C1】_____
A、Shewitnessedanaccident.B、Sheslepttoomuchthatday.C、Sheexperiencedanearthquake.D、Shefoundsomethinghorrible.C
随机试题
cuttendencychangesgrowthdifficultiesdegreegraduationworryingfailedresultriserepor
企业收到银行转来的境外销货单位信用证结算凭证以及所附发票账单、海关进口增值税专用缴款书等有关凭证,材料价款1500000元,增值税额为25500元。企业编制会计分录:
A、氯喹B、磺胺多辛C、青蒿素D、伯氨喹E、乙胺嘧啶治疗疟疾最大缺点是复发率高,应与伯氨喹合用
下列方法不属于免疫化学法的是
短周期元素X、Y、Z的原子序数依次递增,其原子的最外层电子数之和为13。X与Y、Z位于相邻周期,Z原子最外层电子数是X原子内层电子数的3倍或者Y原子最外层电子数的3倍。下列说法正确的是()。
________是指经常违反道德准则或犯有较严重的道德过错行为。
下列有关反倾销行政案件的表述不正确的是()。
Whatwillthewomanprobablybuyforherson?
MEMORANDUMTo:AllStaffFrom:DavidChen,GeneralManagerSubject:PossiblemoverequiredAsyouallknow,we’vehadsomeprobl
InterpersonalRelationshipsInthelast25yearswehavewitnessedanimpressivegrowthinourknowledgeaboutemotionsande
最新回复
(
0
)