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
76
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
LordPercyofNewcastle,Britain’sministerofeducationin1924-29,wasnofanofthefadforhappy-clappy"progressive"educat
JapanandtheUnitedStatesarenow
HowmanymissingAmericanservicemenhavebeenpositivelyconfirmeddeadinVietnamsofar?
Theword"astounding"inthesecondparagraphisclosestinmeaningtoAccordingtothepassage,domesticrobotswill
Theword"ephemeral"inthefirstparagraphprobablymeansWecanlearnfromthefifthparagraphthat
A______isavarietyoflanguagethatservesasamediumofcommunicationamonggroupsofpeoplefordiverselinguisticbackgro
TheImportanceofQuestionsFornon-nativespeakersofEnglishwhowanttoparticipateingroupdiscussions,itisimportant
WhichofthefollowingwordsinParagraphOneimpliesdifficultyinwalking?InthepassagethecontrastbetweentheTibetansa
CultureTherearesomanythingsaboutourlivesthatbelongtothecontentofculturethatitisimpossibletocoverthemal
______,oneofBritain’slargestports,rosetoworldwidefameinthe1960sasthebirthplaceoftheBeetles.
随机试题
适于接种疑有嗜血杆菌、奈瑟菌等标本的培养基
A.自主选择权B.获得赔偿权C.安全保障权D.真情知悉权甲药品零售企业出售马来酸氯苯那敏的有效成分含量低于国家药品标准,此行为侵犯了消费者的()。
哪种卵巢囊肿易发生蒂扭转()。
甲是A公司(国有房地产公司)领导,因私人事务欠蔡某600万元。蔡某让甲还钱,甲提议以A公司在售的商品房偿还债务,蔡某同意。甲遂将公司一套价值600万元的商品房过户给蔡某,并在公司财务账目上记下自己欠公司600万元。三个月后,甲将账作平,至案发时亦未归还欠款
商业银行与非银行金融机构的主要区别在于商业银行()。
单位的报刊大家都不爱看,形同虚设,你负责这件事。怎么办?
下列关于胡司战争的叙述错误的一项是()。
科学一实证主义课程评价观的代表人物是
【B1】【B7】
A、Becausetherearenosignstodirectthem.B、Becausenotourguidesareavailable.C、Becauseallthebuildingsinthecityloo
最新回复
(
0
)