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
63
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] 【B4】
选项
答案
screened
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2975447.html
相关试题推荐
[originaltext]YoucouldsaythatJosephCornellbecameanartistbecauseof
AMOMENT’SINATTENTIONCAUSESACCIDENTSisaself-defeatingwarningbecause_____
AMOMENT’SINATTENTIONCAUSESACCIDENTSisaself-defeatingwarningbecause_____
Idon’t______(认为说出真相是明智的),becauseithurtsheralot.consider/thinkitwise
[originaltext]Forcenturies,parrotshavebeenprizedpetsbecauseoftheir
[originaltext]Forcenturies,parrotshavebeenprizedpetsbecauseoftheir
[originaltext]Forcenturies,parrotshavebeenprizedpetsbecauseoftheir
Becauseaheadacheisnotadisease,itwillnotcauseseriousinfluenceonour
Becauseaheadacheisnotadisease,itwillnotcauseseriousinfluenceonour
Becauseaheadacheisnotadisease,itwillnotcauseseriousinfluenceonour
随机试题
Blindphotographysoundsstrange.Butastriking【B1】______ofphotographsin
某单位数据中心对外提供云计算服务,可以使个人或企业用户使用其数据中心的服务器、磁
女性,27岁,停经53天,近1周腹痛、阴道出血,尿妊娠试验阴性。超声检查显示(彩
计算沥青针入度指数,需要用到下面那些数值()。A.P(25℃,100g,5s)
债券质押式回购的托管人结算业务模式下,结算参与人(托管人)对于需重点关注和管理的
出现呼吸音增强的疾病是A.重症肌无力 B.贫血 C.胸膜炎 D.膈
在自发消费为正数的线性消费函数中,平均消费倾向( )。A.大于边际消费倾向
在祖国的山山水水间,有这么一群人。他们或俯首案前,呕心沥血研究民间文化;或献身舞
空心胶囊的主要囊材是A.淀粉 B.蔗糖 C.糊精 D.明胶 E.阿拉伯胶
某物流公司承揽了4项货物运输任务,其任务分别是:一是从上海到赞比亚(非洲)的50
最新回复
(
0
)