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
60
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
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedo
Takethisluggageandputit______youcanfindenoughspace.A、whereverB、anypla
[audioFiles]audio_eufm_j46_001(20082)[/audioFiles]A、AnEnglish-Spanishdictiona
美国著名小说《飘》被改编为经典好莱坞影片()A.《出水芙蓉》 B.《魂断蓝桥
在给水排水过程中,使用较多的水泵是( )。A.转子泵 B.往复泵
管饲饮食,一般配方含有A.牛奶 B.豆浆 C.鸡蛋 D.蔗糖 E.以上都
患女28岁,已婚。停经50天,下腹痛,阴道少量出血2天,腰酸腹坠,舌淡红苔薄白,
A.α-萘酚-浓硫酸反应 B.醋酐-浓硫酸反应 C.三氯化铁反应 D.四氢
《幼儿园工作规程》指出,幼儿园应制订合理的幼儿一日生活作息制度,两餐间隔时间不少
患者女性,45岁。被鱼刺扎伤右手食指尖2天,右手食指针刺样痛半天就诊。查体:T3
最新回复
(
0
)