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
Rescue Platform In the aftermath of the terrorist attacks on the World Trade Center, security experts are trying to develop new
Rescue Platform In the aftermath of the terrorist attacks on the World Trade Center, security experts are trying to develop new
admin
2009-06-15
89
问题
Rescue Platform
In the aftermath of the terrorist attacks on the World Trade Center, security experts are trying to develop new ways of rescuing people from burning skyscrapers. One idea is a platform capable of flying vertically and hovering in the air like a helicopter. The platform would rise up and down alongside a skyscraper and pick up people trapped in high stories.
The idea for the vertical takeoff platform was hatched more than ten years ago by a Russian aerospace engineer, David Metreveli, who has since moved to Israel. Metreveli’s design, called the Eagle, calls for two jet engines that turn four large horizontal propellers. The spinning of the propellers generates the necessary lift, or upward force, to raise the platform. The more power is supplied to the propellers, the higher the platform rises. Moving the platform sideways involves applying differing amounts of power to each propeller.
Helicopters are now used in some cases to get people out of burning buildings. Escape baskets slung from them dangle beside the building for people to climb into. Unfortunately, the baskets cannot reach every floor of a building because the ropes from which they hang become unstable beyond a certain length.
So far, Metreveli has built a small-scale model of the Eagle to test his idea. In the wake of September 11, he has been able to secure enough funding to start building a larger, 4-meter by 4- meter prototype, which he calls the Eaglet.
选项
A、Right
B、Wrong
C、Not mentioned
答案
B
解析
本题给出的信息是错误的。第二段说到,救生平台既可垂直升降,也可侧向移动。
转载请注明原文地址:https://kaotiyun.com/show/2Thd777K
本试题收录于:
职称英语理工类基础题库职称英语分类
0
职称英语理工类基础
职称英语
相关试题推荐
AchangesofNewspapersBservicebyNewspapersCsaleplaceofNewspapersDpopularityofNewspapersETrendofNewspapers
HospitalMistreatmentAccordingtoastudy,mostmedicalinternsreportexperiencingmistreatment,includinghumiliationbyseni
AIntroductiontoSingaporeBEducationCEconomyDStateSystemofSingaporeEHistoryofSingaporeFLandandClimate
WhatisthemostimportantfactorforarockettoescapefromtheEarth?AsthereisalwaystheEarth’sgravitational(地心引力的)pul
TherewerenohumanbeingsontheearthduringtheIceAge.Itcanbeinferredfromthepassagethatglacierswereprimarilyma
BetterControlofTBSeenIfaFasterCureIsFoundTheWorldHealthOrganizationestimatesthataboutone-thirdofallpeoplea
Readingthejobad,hewonderedwhetherhewaseligibletoapplyforit.
ParentsintheUnitedStatestendtoasktheirchildrenWhydoAmericanrestaurantsservelargeportions?
CarThievesCouldBeStoppedRemotely(遥远地)Speedingoff(超速行驶)inastolencar,thethiefthinkshehasgotagreatcatch.But
TheeconomycontinuedtoexhibitsignsofdeclineinSeptember.
随机试题
下列不属于《水污染防治法》的适用范围的是()
与制造业相同,房地产开发企业的利润总额也由()基本部分组成。
形成资产经济性贬值的主要因素有()。
预先披露的招股说明书(申报稿)是发行人发行股票的正式文件,应含有价格信息,但发行人不得据此发行股票。()
我国宪法规定,()是我国的根本制度。
请围绕“有用的工具”为大班幼儿设计主题活动,应包含三个子活动。要求:写出主题活动的总目标。
()是深化教育改革、促进教育发展的先导,当前又是全面推进素质教育的前提。
花:牡丹:玫瑰()
依次填入下列各句横线上的词语,最恰当的一组是:①新式标点符号指的是,萌芽于清末,诞生于“五四”,_________到现在的标点符号系统。②就在两年前,他还到四川雅砻江谷地_________,一天内攀登上500米高的山岭,又下降到1000米深的
当数据库中数据总体逻辑结构发生变化,而应用程序不受影响,称为数据的()。
最新回复
(
0
)