首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
The Mir Space Station The Russian Mir Space Station, which came down in 2...
The Mir Space Station The Russian Mir Space Station, which came down in 2...
admin
2020-12-24
24
问题
The Mir Space Station
The Russian Mir Space Station, which came down in 2001 at last after 15 years of pioneering the concept of long-term human space flight, is remembered for its accomplishments in the human space flight history. It can be credited with many firsts in space.
The Soviet Union launched Mir, which was designed to last from three to five years, on February 20, 1986, and housed 104 astronauts over 12 years and seven months, most of whom were not Russian. In fact, it became the first international space station by playing host to 162 people from 11 countries. From 1995 through 1998, seven astronauts from the United States took turns living on Mir for up to six months each. They were among the 37 Americans who visited the station during nine stopovers by space shuttles.
The more than 400 million the United States provided Russian for the visits not only kept Mir operating, but also gave the Americans and their partners in the international station project valuable experience in long-term flight and multinational operations.
A debate continues over Mir’s contributions to science. During its existence, Mir was the laboratory for 23,000 experiments and carried scientific equipment, estimated to be worth $80 million, from many nations. Experiments on Mir are credited with a range of findings, from the first solid measurement of the ration of heavy helium (氦) atoms in space to how to grow wheat in space. But for those favouring human space exploration, Mir showed that people could live and work in space long enough for a trip to Mars. The longest single stay in space is the 437. 7 days that Russian astronaut Valery Polyakov spent on Mir from 1994 to 1995. And Sergie Avdeyev accumulated 747. 6 days in space in three trips to the space station. The longest American stay was that of Shannon Lucid, who spent 188 days aboard Mir in 1996.
Despite the many firsts Mir accomplished, 1997 was a bad year out of 15 for Mir. In 1997, an oxygen generator caught fire. Later, the main computer system broke down, causing the station to drift several times and there were power failures. Most of these problems were repaired, with American help and suppliers, but Mir’s riputation as a spacestation was ruined.
Mir’s setbacks are nothing,though, when we compare them with its accomplishments. Mir was a tremendous success, which will be remembered as a milastone in space exploration and the space station that showed long-term human habitation in space was possible. But ifs time to move on to the next generation. The International Space Station being built will be better, but it owes a great debt to Mir.
One of the contributions Mir makes to science is that it
选项
A.helps astronauts get close to Mars.
B.enables scientists to develop new scientific equipment.
C.sets a record of the longest single human stay in space.
D.shows that multinational operations in space are less expensive.
答案
C
解析
第四段明确提到了“The longest single stay in space is the 437.7 days …”,诸多“首次”“第一”中的一个,即“人类在太空单独停留的最长纪录”,故此题答案为C。
转载请注明原文地址:https://ti.zuoweng.com/ti/4J9QKKKQ
相关试题推荐
Servicestations,motelsandrestaurantspromotedthedevelopmentoftheinte...
Someofthelargerbirdscanremainstationaryintheairforseveralminutes.A.
TheMirSpaceStation TheRussianMirSpaceStation,whichcamedownin2...
TheMirSpaceStation TheRussianMirSpaceStation,whichcamedownin2...
TheMirSpaceStation TheRussianMirSpaceStation,whichcamedownin2...
TheMirSpaceStation TheRussianMirSpaceStation,whichcamedownin2...
TheMirSpaceStation TheRussianMirSpaceStation,whichcamedownin2...
TheMirSpaceStation TheRussianMirSpaceStation,whichcamedownin2...
共用题干 第二篇TheMirSpaceStationTheRussianMirSpaceStation,whichcamedowni...
共用题干 第二篇TheMirSpaceStationTheRussianMirSpaceStation,whichcamedowni...
随机试题
10、A.异丙托溴铵 B.喷托维林 C.沙丁胺醇 D.氨溴索 E.布地奈
丁卡因的特点是 A.很少用于表面麻醉 B.毒性大 C.作用持续时间短 D
两所等级和规模均相同的医院,比较某年疾病的治愈率时发现:两医院的总治愈率相差很大
简述课程标准的基本结构。
心理诊断过程包括针对求助者( )。
下列项目目标动态控制的纠偏措施中,属于技术措施的有()。
4736,3728,3225,2722,2219,()
女性,24岁,近日发现左膝关节疼痛,行走困难,休息缓解,自觉左小腿上内似有肿块,
强心苷中毒最早出现的症状是A.色视B.厌食、恶心和呕吐C.眩晕、乏力和视力模糊D.房室传导阻滞E.神经痛
对某企业进行评估时,一部分产品正处于生产加工中尚未完工,数量为200个,这部分在制品已经过16个小时的加工工序,而完成单位产成品需要20个工时。已知在评估...