首页
登录
职称英语
[originaltext] Spacemen have to be specially trained for traveling in space.
[originaltext] Spacemen have to be specially trained for traveling in space.
游客
2024-03-01
62
管理
问题
Spacemen have to be specially trained for traveling in space. They should be in very good mental and physical health. Most of them are experienced pilots of very fast aeroplanes.
All spacemen have to do various space exercises before traveling to space. They have to be strong enough to bear the great pressures they will feel at launching and landing. When traveling in space or orbiting round a planet, spacemen have to become used to the weightless conditions and learn how to walk, eat, drink and sleep in a condition of weightlessness. They train for their space travels in model spacecraft, which are like the actual spacecraft. Spacemen also have to know all about the various parts of their spacecraft. They should be able to repair any part that is damaged while traveling.
When man goes into space he must take air, food and water. He must also get rid of bad air and waste matter. Food is prepared in a paste form and kept in tubes. Waste is stored in containers and got rid of when the spacecraft reaches the Earth. These problems have been solved for short space trips, but not for long trips.
选项
A、The shortage of water,
B、The shortage of food.
C、The condition of weightlessness.
D、The great pressure outside the spacecraft.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3496736.html
相关试题推荐
[originaltext]M:Isthistableinthecomerokay?W:Sure.Wecansithere.M:
[originaltext]M:Isthistableinthecomerokay?W:Sure.Wecansithere.M:
[originaltext]W:Ihavebeenlookingthroughyourapplication.Youseemtohave
[originaltext]W:Ihavebeenlookingthroughyourapplication.Youseemtohave
[originaltext]M:I’dliketocheckin,please.Ididn’tmakeareservation.W:
[originaltext]M:I’dliketocheckin,please.Ididn’tmakeareservation.W:
[originaltext]M:I’dliketocheckin,please.Ididn’tmakeareservation.W:
[originaltext]M:I’dliketocheckin,please.Ididn’tmakeareservation.W:
[originaltext]M:I’dliketocheckin,please.Ididn’tmakeareservation.W:
[originaltext]AmericanengineersPaulFloresandJimGibbsonarestudyingM
随机试题
Whatwillthespeakersdiscuss?[br][originaltext]M:Iknowyouwanttotalka
Oursocietyvaluesboysandtheirexperiencemorethanitvaluesgirls,and
Recently,CongressionalDemocratsintroducedlegislationtomakeiteasierf
A.2.5kN·m,3kN·m B.-2.5kN·m,-3kN·m C.-2
2008年我国人事工作的主要任务是:全面贯彻党的十七大精神,高举中国特色社会主义
可以作为医疗机构制剂申报的品种是A.市场上没有供应的中药、化学药组成的复方制剂
患者女,28岁,5天前因左上第二磨牙食甜物痛,曾直接做银汞充填。充填后觉冷热刺痛
拍卖买受人主张瑕疵请求权遇到障碍的情形有( )。A.委托人.拍卖人由于疏忽而没有
人民调解是指人民调解委员会通过说服、疏导等方法,促使当事人在()基础上自愿
依据《中华人民共和国海洋环境保护法》,建立海洋自然保护区的条件有( )。A.具
最新回复
(
0
)