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
2023-09-01
39
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/2975448.html
相关试题推荐
AMOMENT’SINATTENTIONCAUSESACCIDENTSisaself-defeatingwarningbecause_____
AMOMENT’SINATTENTIONCAUSESACCIDENTSisaself-defeatingwarningbecause_____
AMOMENT’SINATTENTIONCAUSESACCIDENTSisaself-defeatingwarningbecause_____
Becauseofthescandal,thepopsinger_____________(最终辜负了歌迷们的期望).finallyfaile
[originaltext]Forcenturies,parrotshavebeenprizedpetsbecauseoftheir
Becauseaheadacheisnotadisease,itwillnotcauseseriousinfluenceonour
Becauseaheadacheisnotadisease,itwillnotcauseseriousinfluenceonour
Becauseaheadacheisnotadisease,itwillnotcauseseriousinfluenceonour
Becauseaheadacheisnotadisease,itwillnotcauseseriousinfluenceonour
Becauseaheadacheisnotadisease,itwillnotcauseseriousinfluenceonour
随机试题
CarlyFiorina,Hewlett-Packard’schiefexecutive,cameoutfightingonNovem
[originaltext]W:Itwasaheavystormlastnight,wasn’tit?M:Itcertainlywa
Itis,everyoneagrees,ahugetaskthatthechildperformswhenhelearnst
Theyoungwriterisnot______presently,buthewillbewellknowntotheworld
TheWorldTradeOrganizationwasestablishedin1995.It【B1】______outofth
{图1}
以下关于音乐体裁的表述错误的是()A.歌剧、艺术歌曲、室内乐属于西方音乐的
患者,女性,70岁。糖尿病病史15年,2周前突发脑梗死住院治疗,现病情平稳出院。
下列关于刑事诉讼中负有证明责任主体的各种说法,错误的有:()A.在张某巨额财产
患者女,45岁。右上尖牙咀嚼痛1周,伴右侧眶下区肿痛3天。查体见右眶下肿胀明显,
最新回复
(
0
)