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
20
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] 【B5】
选项
答案
radiation
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3591714.html
相关试题推荐
Adulteducationdevelopsfastrecentlypartlybecause______.[br]Themainpurp
Adulteducationdevelopsfastrecentlypartlybecause______.[br]Itcanhasin
Adulteducationdevelopsfastrecentlypartlybecause______.[br]Whatissaid
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
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
随机试题
[originaltext](17)Sometreescansurvivealongtimewithoutwater.Think
Becausethetwocandidatesgainthesamenumberofvote,itneedsaclose______
Themanagerwouldratherhisdaughter______(不在同一个办公室内工作).didnotworkinthesam
再生障碍性贫血血象表现为()A.全血细胞减少 B.红细胞及血红蛋白减少
子宫颈癌已扩散到直肠、膀胱,应属于下列哪项A.Ⅱa期 B.Ⅱb期 C.Ⅲa期
关于柱式墩台施工要求,正确的有()。A、墩台柱与承台基础接触面应凿毛处理,清除
左边是给定的四面体外表面的展开图,右面哪一项能由它折叠而成? A.如上图所示
公共交通线路经营权有偿出让收入属于()。A.政府性基金 B.国有资产有偿使用
S企业不能清偿到期债务时,其债权人对S企业提出破产申请,根据《企业破产法》的规定
根据《关于加强固定资产投资项目资本金管理的通知》,下列属于其主要内容的有(
最新回复
(
0
)