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
54
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】______
【B11】
选项
答案
but no really effective ones have been found so far
解析
听到转折词but,可知其后表达之意应与前句相反,前文说药物也许可以减少辐射之害,这里一个转折,说还没发现有效的药。
转载请注明原文地址:https://www.kaotiyun.com/show/7Pn7777K
0
大学英语六级
相关试题推荐
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingathome,raysthegovernment’schiefmedicalofficer,
ImprovingthebalancebetweentheworkingpartofthedayandtherestofitisagoalofagrowingnumberofworkersinrichWe
A、Theycouldn’tgetenoughincometokeepthemrunning.B、Youngpeoplecouldn’taffordtopaythetuitionfees.C、Keepingthemr
A、BecauseSamisalawschoolstudent.B、BecauseSamisherbestfriend.C、BecauseSamisherclassmate.D、BecauseSamhassome
A、StayingatHomeB、WorkandHappinessC、WorkandProductivityD、AmericansandEuropeansB选项中实词的首字母都大写表明,本题考查短文标题。短文从各个方面对美国人和欧洲
Friendshipisbothasourceofpleasureandacomponentofgoodhealth.Peoplewhohaveclosefriendsnaturallyenjoytheir【C1】_
A、Enteringalargecompanywithoutapplication.B、Programminghumanfeelingsintomachines.C、Decidingone’sbestpartnerthroug
A、Hedoesn’twanttohelp.B、Heisn’tabletowork.C、Hewillhelpthewomanlater.D、He’dliketoworkhere.A
A、Buyahigh-qualitylaptop.B、Havearegulartimetable.C、Separatethekeyboardandthescreen.D、Substitutethescreenwitha
ProperstreetbehaviorintheUnitedStatesrequiresanicebalanceofattentionandinattention.Youaresupposedtolookata【
随机试题
假设A比B长,C比B短,问A比C长吗?这种推理属于()
以下有关Windows7操作系统的叙述,正确的是________。
能行气消食化痰的药物是()
乳腺癌切线照射时,下列不正确的是
解颅是指
下列各项中,可用于确定所提供劳务完工进度的方法有()。
在优秀班主任报告会上,古老师这样回顾自己的教育工作:一个新生小磊刚刚转来,不喜欢说话,下课后也不和其他的同学一起去玩,上课时注意力不集中,学习成绩一般。于是,在课间活动中,古老师领着这个学生和其他学生一起玩老鹰捉小鸡的游戏,小磊在鸡妈妈的保护下玩得很开心。
中国立足本国国情的和平发展道路已经并将进一步显示出其世界意义。世界意义有()
VenusFlytrapsA.FromindigenousmythstoJohnWyndham’sDayoftheTrafficsandtheoff-BroadwaymusicalLittleShopofHor
______isthefirstAmericanwritergrantedNobelPrizeofLiterature.
最新回复
(
0
)