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
61
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:http://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
下列选项中不属于“戴明环”阶段之一的是( )。A.计划阶段 B.实施阶段
在木材基层上涂刷涂料时,木材基层含水率的最大值为:()A.8% B.9%
创建型设计模式与对象的创建有关,按照所用的范围分为面向类和面向对象两种。其中,(
非正规的组织管理方法包括( )。A.行为规范 B.企业规章制度 C.信念
卵巢表面上皮肿瘤是 A.未成熟型畸胎瘤B.浆液性囊腺瘤 C.颗粒细
采用贷款人受托支付的,银行应要求借款人在使用贷款时提出( ),并授权贷款人按合同
什么是特殊儿童?特殊儿童有几类?
在计算个人所得税时,下列各项中允许税前全额扣除的是( )。A.个人通过国家机关向
已知:某公司现金收支平稳,预计全年(按360天计算)现金需要量为360000元
检举税收违法行为是检举人的自愿行为,检举人可以实名检举,也可以匿名检举。(
最新回复
(
0
)