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
2023-07-29
48
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、They need more friends who give them courage.
B、They need more physical exercises.
C、They need more food.
D、They need special training.
答案
D
解析
转载请注明原文地址:http://tihaiku.com/zcyy/2880475.html
相关试题推荐
[originaltext]Not,longago,someofyoumayhavereadabouttheteamofmounta
[originaltext]Not,longago,someofyoumayhavereadabouttheteamofmounta
[originaltext]Not,longago,someofyoumayhavereadabouttheteamofmounta
[originaltext]Nooneknowsexactlywhywesleep.Butscientistshavelearneda
[originaltext]OneofraymaingoalsinthissurveycourseofAmericanpainting
[originaltext]M:So,Marie,youworkwithcomputers?W:That’sright.I’macom
[originaltext]M:So,Marie,youworkwithcomputers?W:That’sright.I’macom
【B1】[br]【B10】[originaltext]Sometimes,anoldstorycouldbesomeaningfultha
【B1】[br]【B9】[originaltext]Sometimes,anoldstorycouldbesomeaningfulthat
【B1】[br]【B8】[originaltext]Sometimes,anoldstorycouldbesomeaningfulthat
随机试题
Formostspeciesofanimals,thenumberofindividualsinthespeciesisinverse
Youcantellalotaboutpeoplebylookingattheirhair—andnotjustwhethe
[originaltext]Recentlytheterm"health"hascometohaveawidermeaningt
Weighingourseregulaysaoneruway1os
学习活动过程中做网络结构图是一种常用的()A.复述策略 B.精细加工策略
冠周炎可并发面颊瘘,其常见位置相当于A. B. C. D. E.
下列有关医德考评说法正确的是A.医德考评要完全做到量化考核 B.医德考评要坚持
由国务院制定并颁布实施的《全国经济普查条例》是统计行政法规。( )
以下关于劳动法律关系特征的表述,正确的是()。A.是一种双务关系 B.具有经
关于直流电动机启动方式的选择,下列叙述不正确的是()。A.直流电动机应采用励磁
最新回复
(
0
)