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
2023-08-29
52
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] 【B10】
选项
答案
So far,no dangerous amounts of radiation have been reported, but the Apollo missions have beenquite short
解析
这里要听的部分有两个分句,这两个分句的旬式均较简单,而像radiation和Apollo missions等关键词均在前文已有提及,仔细倾听,不难写出答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2968470.html
相关试题推荐
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
Jeandidnothavetimetogototheconcertlastnightbecauseshewas______(忙
MarkTwain’sgoodeducationismainlythefoundationforhisworks.[br]Because
Roadcourtesyisgoodsensebecause______.[br]Accordingtotheauthor,______
Roadcourtesyisgoodsensebecause______.[br]Anexampleofmisplacedmanners
ItriedtorelaxbecauseIknewIwoulduseupmyoxygensooner____________(我越是激
随机试题
Thegulfbetweenthetwocountriescannotbebridged,andtheiropinionsareso
SpeakerA:Oh,Iamsorry.IjustrealizedthatIforgottobringthetaperecor
[img]2022m3x/ct_ve01202001m_eillist_1404_220329[/img][br][originaltext]Today
Ablowontheheadmaycause______unconsciousnesswithoutlastingdamage.A、compl
Inlastyear’sSciencestudy,researchersatJohnsHopkinsUniversityexami
An(),servingafunctionsimilartoaph
深圳证券交易所的收盘价通过()的方式产生。A.柜台竞价 B.自由竞价
用比较定价法制定价目表时,制定均价是关键步骤。其中,( )。A.均价的制定要考
2017年我国成年国民图书阅读率为59.1%,比上年增加0.3个百分点;报纸阅读
肺心病发病的主要机制是 A.肺泡毛细血管急性损伤 B.支气管肺感染和阻
最新回复
(
0
)