首页
登录
职称英语
Space is a dangerous place, not only because of meteors(流星)but also because
Space is a dangerous place, not only because of meteors(流星)but also because
游客
2024-05-10
28
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【B1】_____ again acts as our protective blanket on earth Light gets through, and this is【B2】_____ for plants to make the food which we eat. Heat, too, makes our environment【B3】_____. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are【B4】_____ off. As soon as men leave the atmosphere they are exposed to this【B5】_____ and their spacesuits or the walls of their spacecraft, if they are inside, do【B6】_____ a lot of radiation damage.
Radiation is the greatest known danger to【B7】_____ 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 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is【B8】_____ difficult to be sure about radiation damage—【B9】______, 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 rems.【B10】______, 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,【B11】______ [br] 【B7】
选项
答案
explorers
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3591716.html
相关试题推荐
Tonyshouldn’thavebeeninvolvedinitbecause______(正是那个意外事件让他破了产).itwast
Adulteducationdevelopsfastrecentlypartlybecause______.[br]Itcanhasin
Adulteducationdevelopsfastrecentlypartlybecause______.[br]TheAmerican
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
随机试题
[originaltext]Whotakescareofyourtaxes?(A)Myaccountanthandlesthem.(B)I
[originaltext]M:Ican’tconcentrateonmyworkbecauseoftoomuchnoiseoutsi
EnglishLanguageDevelopmentOldEnglish,until1066
Ifeveryouarecalled【C1】______tointroduceaspeaker;itwouldbewellfor
租赁资产交易是金融租赁公司之间以金融资产为媒介进行的买卖交易。()
技术分析的理论基础是()。A.道式理论 B.预期效用理论 C.美林投资时钟
常见的间接融资方式有( )。 ①银行信用融资 ②消费信用融资 ③租赁融资
心功能不全时,在血容量增加的代偿反应中起主要作用的脏器是A:心 B:肝 C:
简述培训课程要素、培训课程设计的原则。
参与性技术中不包括()。 (A)情感反应(B)面质 (C)内容反应(D
最新回复
(
0
)