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
The expanding International Space Station has living space, a laboratory, storage modules and solar power panels. Now it will ge
The expanding International Space Station has living space, a laboratory, storage modules and solar power panels. Now it will ge
admin
2010-06-18
66
问题
The expanding International Space Station has living space, a laboratory, storage modules and solar power panels. Now it will get a backbone. The space shuttle Atlantis is set to take off for the station with a huge truss crammed into its cargo bay. The goal of the l l-day mission is to attach the central part of what will eventually become a support beam for the station.
The truss is made up of metal crossbars and filled with wiring, pipes, computers and other equipment. It is to be attached to the station during four spacewalks by the seven-member crew. The astronauts will also attach a mobile transport platform to tracks atop the truss, the first part of a 300-foot (100-meter) mini-railroad that will carry a robotic arm and crew members back and forth across the station on future construction and repair jobs.
Atlantis’s 25th flight will be the first in the 21-year history of the shuttle program for which the National Aeronautics and Space Administration will delay announcing the precise launching time for a civilian mission. Citing heightened security since Sept. 11, the agency said that liftoff would occur between 2 and 6 p.m. and that it would not announce the official time until 24 hours before the flight.
Before launching, NASA must determine that he 58-foot Canadian - built robot arm attached to the station is operating properly, since it will be critical in installing the truss. The multijointed Canadarm 2, as it is called, was installed last April and has since experienced periodic problems. In some operations recently, the brake on one of the arm’ s seven joints has not released properly, causing it to malfunction.
To work around the problem, Canadian engineers wrote new computer software to operate the arm with six joints. The three-member resident crew at the station is testing the new operating procedures for installing the truss. If the software patch fails, the mission could be delayed several days until the problems are worked out.
Adding the center truss element begins a new phase for the $ 60 billion station, a 16-nation project led by the United States in cooperation with Russia, Japan, Canada and members of the European Space Agency. Over the next two years, six other girder sections will be added to serve as the home for four giant solar power arrays, heat radiators and other equipment that must be in place before attaching science modules from other nations.
The "truss" is______.
选项
A、a space shuttle that carries a support beam
B、a mobile transport platform
C、a framework designed to support devices
D、a laboratory
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/GxlO777K
0
专业英语八级
相关试题推荐
There’sanewcampaignfortheunder-30scalledUndivided.ItgatherssuggestionsaboutBrexitfromacrossthespectrum;leavers
Whenahumaninfantisbornintoanycommunityinanypartoftheworldithastwothingsincommonwithanyinfant,providedne
Somevoterswillwastetheirballotsbecause
Thedigitalrevolutioninconsumerelectronics,includingpersonalcomputergadgets,begantogainmomentumin1998,andisexpe
Fromhairspraystohairpieces,fromreducingdietstotwenty-four-hourfitnesscenters,fromfalseeyelashestobluecontactle
Ifitwereonlynecessarytodecidewhethertoteachelementarysciencetoeveryoneonamess【M1】_____bas
Rabiesisanordinarilyinfectiousdiseaseofthecentralnervoussystem,causedbyavirusand,asarule,spreadchieflybydo
A、Tellingjokes.B、Fallingasleepduringmeals.C、Stayinglateafterclass.D、Eatinginthecafeteria.C
Anovertimpactofmodeminformationsystemsconcernstheindividual’sstandardandstyleofliving.Informationsystemsaffect
随机试题
大量耳漏带臭味,鼓膜大穿孔,可见鼓岬裸露的白色骨质,耳漏细菌培养为溶血性链球菌感染。多见于
患者孕2月余,阴道出血逐渐增多,腹痛逐渐加重,并有胎块排出。可诊为
根据《建设工程设计合同(示范文本)》,关于设计费的说法,正确的是()。
上市公司并购重组项目的财务顾问主办人发生变化的,财务顾问应当在()个工作日内向中国证监会报告。
依法行政是指行政机关应当依据法律规定,在法定权限内,按照法定程序作出证据确凿充分的行为。根据上述定义,下列行为符合依法行政要求的是()。
一般保证人与债权人未约定保证期间的,保证期间为()
AnewbookbyaformerlawyeratKirkland&Ellis,oneofthenation’slargestlawfirms,hasdeliveredathrilltothealready
以下TCP/IP中,哪个是应用层协议?
假定有如下语句:answers=MsgBox(“String1”,“String2”,“String3”,2)执行该语句后,将显示一个信息框,单击其中的“确定”按钮,则answers的值为
Intoday’sjobmarketplace,youcanexpecttheinterviewtobea"structured"event—eachcandidatewillbeaskedthesameprede
最新回复
(
0
)