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
考研
The number of permanent crew on the International Space Station will be increased, and possibly doubled, from 2006 by providing
The number of permanent crew on the International Space Station will be increased, and possibly doubled, from 2006 by providing
admin
2010-01-13
122
问题
The number of permanent crew on the International Space Station will be increased, and possibly doubled, from 2006 by providing it with an extra "lifeboat". The move, announced in Japan last week by the ISS partner nations, means the space station crew will at last be able to do useful scientific research.
The number of crew on the ISS has been limited to three by the capacity of the Russian Soyuz capsules that would return them to Earth in an emergency. But running the ISS requires the full-time attention of more than two crew members, leaving just half the time of one of the crew free for research. This is woefully inadequate, and a NASA-commissioned report concluded in July that no meaningful research is possible with a three-person crew.
NASA originally planned to replace the Soyuz rescue capsule with a seven-person "crew return vehicle", which would have allowed the ISS to carry a significantly larger permanent crew. But faced with a $ 5 billion budget overrun, the agency cancelled the project last year.
Then last month NASA announced plans for an orbital spaceplane as a successor to the ageing fleet of space shuttles. This could double as a rescue vehicle for at least six people, but it will not be ready until 2010.
Waiting for the spaceplane could be a big problem as Soyuz capsules have only a six-month lifespan and the Russian agreement to supply them expires in 2006. This could leave a four-year gap with no guaranteed rescue vehicle for the ISS, and hence no crew. Russia has already warned that cash shortages could force it to stop making the capsules.
If the cash can be raised, however, the new plan is to permanently station two Soyuz capsules at the ISS, raising the rescue capacity to six. The ISS’s Russian-built modules have three ports where Soyuz can dock, one of which is usually used for uncrewed cargo modules.
NASA cancelled its project of building a 7-person spacecraft because of ______.
选项
A、the limitation of technology
B、lack of funding
C、government’s disapproval
D、the insignificance of research work
答案
B
解析
具体细节题。见第3段第2句:But faced with a $5 billion budget overrun,the agency cancelled the project last year。
转载请注明原文地址:https://kaotiyun.com/show/cjmi777K
0
在职申硕(同等学力)英语
相关试题推荐
Somepeoplefeelsadaboutglobalizationbecausetheybelieveitwill______Whichofthefollowingcouldbethebesttitleof
Thewriterappliedforthejobbecause______Whatdoesthewriterrealizenowthathedidnotrealizethen?
TheNetherlandsplanstostartbuildingfloatingcommunitiesonwaterbecause______Accordingtotheauthor,thefloatingcomm
Tennessee’spopulationisnearlytwo-fifthsrural,andnosinglecityorgroupofcities______thestate.
TheAmericans______GeorgeWashingtonasthefatheroftheircountry.
Conventionalwisdomaboutconflictseemsprettymuchcutanddried.Toolittleconflictbreedsapathy(冷淡)andstagnation(呆滞).
ThecostoflivinginLiberia,WestAfrica,has______inthepastfiveyearsbecauseoftheinternalconflicts.
Forthesereasons,thenewspaperishaving______problemsinthenorthofthecountry.
JudgmentwassuspendedtillthefollowingMondaybecauseofthelackofevidence.
Ihaveaninfatuation(迷恋)withautumn.Thecolorsoftheseason,andthesmells,havealwaysthrilledme.Ihavealwaysfoundjoy
随机试题
利率平价说反映了()之间的关系。
组织行为的执行主体是()
创造能力是指超脱具体的知觉情景、思维定势、传统观念和习惯势力的束缚,在习以为常的事物和现象中发现新的联系和关系,提出新的_____和产生新的产品的能力。
关于应收账款周转率的正确表达是()。
甲公司2000年度因购入乙公司债券需编制的会计分录为()。乙公司2000年12月31日“资产负债表”上的“股东权益合计”和“未分配利润”项目的金额分别为()元。
拥有较高知名度、美誉度和忠诚度的企业品牌,会传达给消费者一种愉悦的感受,让人更加放心。好的品牌会像磁石一样吸引消费者,使之形成品牌忠诚,反复购买使用。其他产品的使用者也会受品牌的吸引而开始使用此产品,并可能同样成为此品牌的忠实消费者。这属于()。
某企业应纳税所得额为7万元,应缴纳企业所得税为()元。
材料1:济南,近几年常被以“大县城”等称呼调侃,对于拆违拆临、整治城市环境,市民的需求很迫切,呼声越来越高。群众有所呼,政府有所应。济南市委、市政府高度重视,深入调研,根据群众“痛点”,将七类违建当成重点治理对象。1.擅自占用规划确定的
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
Noonecanbeagreatthinkerwhodoesnotrealizethatasathinkeritishisfirstdutytofollowhisintellecttowhateverco
最新回复
(
0
)