首页
登录
职称英语
Space is a dangerous place, not only because of meteors (流星) but also becaus
Space is a dangerous place, not only because of meteors (流星) but also becaus
游客
2023-09-06
43
管理
问题
Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The【26】again acts as our protective blanket on earth. Light gets through, and this is【27】for plants to make the food which we eat. Heat, too, makes our environment【28】Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are【29】off. As soon as men leave the atmosphere they are exposed to this【30】and their spacesuits or the walls of their spacecraft, if they are inside, do【31】a lot of radiation damage.
Radiation is the greatest known danger to【32】in space. The unit of radiation is called "rem". Scientists have reason to think that a man can put up with far more radiation than 0.1 rein without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is【33】difficult to be sure about radiation damage—【34】, and this will not be discovered until the birth of deformed children or even grandchildren. Missions of the Apollo flights have had to cross belts of high amounts of reins.【35】, we simply do not know yet how men are going to get on, when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation,【36】 [br]
Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment endurable Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation and their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space. The unit of radiation is called "rem". Scientists have reason to think that a man can put up with far more radiation than 0.1 rein without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage—a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed children or even grandchildren. Missions of the Apollo flights have had to cross belts of high amounts of reins. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short , we simply do not know yet how men are going to get on, when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far
选项
答案
endurable
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2990643.html
相关试题推荐
MostpeoplethinkoflionsasstrictlyAfricanbeasts,butonlybecausethe
[originaltext]Peopleoftenmissmealsbecausetheygetbusyoraretrying
[originaltext]Peopleoftenmissmealsbecausetheygetbusyoraretrying
MarsfascinatesscientistsbecauseofitssimilaritytoEarth,anditfasci
MarsfascinatesscientistsbecauseofitssimilaritytoEarth,anditfasci
MarsfascinatesscientistsbecauseofitssimilaritytoEarth,anditfasci
MarsfascinatesscientistsbecauseofitssimilaritytoEarth,anditfasci
MarsfascinatesscientistsbecauseofitssimilaritytoEarth,anditfasci
MarsfascinatesscientistsbecauseofitssimilaritytoEarth,anditfasci
MarsfascinatesscientistsbecauseofitssimilaritytoEarth,anditfasci
随机试题
Thousandsofyearsago,inthemiddleofanocean,milesfromthenearestisl
ChangeandtheNewspaperForthelastthreehundredyear
Whichofthefollowingbestcompletesthepassagebelow?Themoreworriedinvest
Legislation,LawsuitsCoverBothSidesonSame-sexMarriage
(1)Asmallgroupofsalt-and-pepperhairedwomenwholiveoutsideJackson,M
对正剪力的规定是()。A.截面上的剪力绕梁段上任何一点有顺时针转动的趋势 B
A.385MPa B.-385MPa C.714MPa D.-714MPa
在施工组织总设计的主要内容中,在总体施工部署之后应进行()。A、计算主要工种
发生急性心肌梗死的病理基础是A.粥样斑块破裂 B.动脉粥样硬化致管腔严重狭窄和
2,5,,,( )。
最新回复
(
0
)