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
29
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] 【B3】
选项
答案
endurable
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2975446.html
相关试题推荐
Itisunfairforthosechildren________________(只能接受较差的教育)simplybecausethey
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
随机试题
SentencecompletionCompletethesentencesbelow.WriteNOMORETHANTWOWORDS
Ascollegeseniorshurtleintothejobhunt,littlefibsontheresume--fore
ThepollutionofHongKong’sbeachesbyoilfromadamagedtankerlastyear
Tensofthousandsofthepoorestpart-timestudentsaretogetextramoneyt
如果人所能承受的最大压强为1.274MPa(表压强),那么潜水员的极限潜水深度为
A.醋大黄B.酒大黄C.熟大黄D.大黄炭E.清宁片以消积化瘀为主的饮片是
根据下列资料回答问题。 保险密度表示的是人均保费,那么河南当年的人口数
下面的数字基本都有一个共同的特点,只有一个数字与众不同,这个数字是()。
乙公司2×21年有关持有待售非流动资产资料如下: (1)2×21年8月6日
施工企业项目经理部经营活动的法律后果由()。A.项目经理部承担 B.企业法人
最新回复
(
0
)