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
Rescue Platform In the aftermath of the terrorist attacks on the World Trade Center, security experts are trying to develop
admin
2015-08-05
90
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【C1】______is a platform capable of flying vertically and hovering in the air【C2】______a helicopter. The platform would rise up and down alongside a skyscraper and pick up people【C3】______in high stories.
The idea for the vertical takeoff platform was hatched(策划)more than ten years ago by a Russian aerospace engineer, David Metreveli, who has since moved to Israel. Metreveli’s design, 【C4】______the Eagle, calls for two jet engines that【C5】______four large horizontal propellers. The spinning of the propellers【C6】______the necessary lift, or upward force, to raise the platform. The more【C7】______is supplied to the propellers, the higher the platform【C8】______. Moving the platform sideways involves【C9】______differing amounts of power to each propeller.
Helicopters are now used in some【C10】______to get people out of burning buildings. Escape baskets slung from them dangle beside the building for people to climb into. 【C11】______, the baskets cannot reach every floor of a building 【C12】______the ropes from which they hang become unstable【C13】______a certain length.
So far, Metreveli has built a small-scale model of the Eagle to【C14】______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, 【C15】______he calls the Eaglet.
【C13】
选项
A、beyond
B、under
C、off
D、on
答案
A
解析
beyond a certain length意为“超出一定长度”。
转载请注明原文地址:https://kaotiyun.com/show/yDQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
Streetsellersparticularlyindevelopingcountries,supplylargeamountsoffood【H1】peopleonlowincomes.Thissectoralsoemp
SomeplantsandanimalsdevelopsuperiorcharacteristicssothattheymayWhichofthefollowingisnotdirectlymentioned?
随机试题
MOVC,00H指令中源操作数的寻址方式是()
下列关于心肺脑复苏的叙述,正确的是()
男,25岁,2年来有发作性神志丧失,四肢抽搐,服药不规则,今日凌晨开始,又有发作,意识一直不清醒,来院后又有一次四肢抽搐发作。病人目前情况属于下列哪一种
普萘洛尔治疗心绞痛时可产生下列哪一作用
根据《仲裁法》的规定,以下关于仲裁制度的表述,正确的是()。
A公司经过甲介绍成功地向B公司销售了一批货物。下列属于不正当竞争行为的是()。
函数f(x)=展开成x的幂级数为___________.
求
以下关于嵌入式处理器的说法错误的是()。
Ifyou’vekeptupwiththenewslately,you’veprobablyhearddirewarningsaboutavianflu,orbirdflu.It’sahighlyinfectio
最新回复
(
0
)