首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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】______
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】______
admin
2013-06-15
17
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】______
【B7】
选项
答案
explorers
解析
此空位于介词“to”之后,可知应填名词或名词性的成分;根据前面讲到的“太空服和宇宙飞船可以阻隔辐射以使在太空中的人免受其害”,不难听出这里的explorers,注意要用复数。
转载请注明原文地址:https://kaotiyun.com/show/EJn7777K
0
大学英语六级
相关试题推荐
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingathome,raysthegovernment’schiefmedicalofficer,
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingathome,raysthegovernment’schiefmedicalofficer,
A、Theinterviewersinagroupinterviewaretheretoassessyourworkingabilities.B、Yourunderstandingofthejobrequirements
AnneHechehasprovenherselfanexceptionalactressinfilm,televisionandstage.Hertalentshaveearnedhercriticalpraise
It’sa(47)______oftenrequestedinlonelyheartsadsandscientistshavenowshownthatagoodsenseofhumoris(48)______fo
Todaywearegoingtopracticeevaluatingthemaintoolusedwhenaddressinggroups—the【B1】______.Therearethreemainelement
A、Morestructuredtechniquesmakepeopledeeplyrelaxed.B、Meditationistheonlywayleadingtorelaxation.C、Progressivemuscl
A、Theworkersontheplatformswerereplacedbymachines.B、Itbecamethefirstcompletelyautomaticrailwayintheworld.C、Ac
Agrowingnumberofscientistsinsistthatanswerstotheworld’sproblemswillnotcomefroma【B1】______arrayofelectronics
A、She’sunimpressedbywhatthemantoldher.B、Shedoubtsshecanaffordit.C、Shedoesn’tthinkit’ssuitableforher.D、She’s
随机试题
在甜的溶液中,添加少量________,可使甜昧增大。
胃肠道结核好发于克隆氏病最好发于
闭经,伴头晕耳鸣,腰膝酸软,多属于闭经,伴头晕眼花,心悸气短,多属于
常见的前纵隔肿瘤是
患者,女性,32岁。妊娠31周,少量阴道流血,以往曾有3次早产史。主要处理应是
下列关于执行程序和审判程序的说法中,正确的有:()
某股票的现值越大,其内在价值也就越大。()
我国《物权法》所称物权,包括以下哪些方面的权利?()
简述无权代理的效力。
邓小平关于我国当前处于“社会主义初级阶段”的科学论断揭示了我国当前的
最新回复
(
0
)