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
2024-05-10
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] 【B9】
选项
答案
a person may feel perfectly well, but the cells of his or her sex organs may be damaged
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3591718.html
相关试题推荐
It’sveryhardtomakeitasapopstar______(因为你会面临很多竞争).becauseyouhavetogo
Kunzgaveupsoftwareengineeringmainlybecauseheearnedlessthanthoseinla
Kunzgaveupsoftwareengineeringmainlybecauseheearnedlessthanthoseinla
Kunzgaveupsoftwareengineeringmainlybecauseheearnedlessthanthoseinla
Kunzgaveupsoftwareengineeringmainlybecauseheearnedlessthanthoseinla
Kunzgaveupsoftwareengineeringmainlybecauseheearnedlessthanthoseinla
MostpeoplethinkoflionsasstrictlyAfricanbeasts,butonlybecausethe
MoreAmericansaretakingupeducationafterretirementspartlybecause______.
MoreAmericansaretakingupeducationafterretirementspartlybecause______.
[originaltext]DangerousoccupationstendtobeexcitingandWellpaid.They
随机试题
[originaltext]W:Ihaven’theardfrommymothersincethemonthbeforelast.M:
She______thewashingoutinthegardenbecauseitwasfineyesterday.A、hungB、h
[originaltext]ThomasWheeler,achiefexecutiveofficeroftheMassachusett
There’snobetterfeelinginajobthanwhenyouknowthebosshasfullconf
下列《中华人民共和国行政许可法》中关于行政许可的撤销和审批说法,不正确的是(
共用题干 ApproachestoUnderstandingIntell
男性,60岁。近3~4个月来常于上楼、情绪激动、饱餐后出现胸前区压搾性疼痛,以胸
深圳证券交易所规定,配股认购期为()个工作日,上市公司在配股缴款期内应至少刊登(
以上图中,原植物属于芸香科的饮片是
女,19岁,上前牙松动3年,检查见上切牙松动Ⅱ°,扇形移位,口腔卫生较好,初步印
最新回复
(
0
)