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
A. endurable B. protection C. exposed D. if E. until F. extremely G. acts as H. decrease I. curable J. disaster K. attributed L.
A. endurable B. protection C. exposed D. if E. until F. extremely G. acts as H. decrease I. curable J. disaster K. attributed L.
admin
2017-06-17
44
问题
A. endurable B. protection C. exposed D. if E. until
F. extremely G. acts as H. decrease I. curable J. disaster
K. attributed L. danger M. effective N. before O. essential
Space is a dangerous place, not only because of meteors(流星)but also because of rays from the sun and other stars. The atmosphere again【C1】______ our protective blanket on earth. Light gets through, and this is【C2】______ for plants to make the food we eat. Heat, too, makes our environment【C3】______. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are【C4】______ to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.
Radiation is the greatest known【C5】______ to explorers in space. The unit of radiation is called "rem (雷姆)". Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged. The trouble is that it is【C6】______ difficult to be sure about radiation damage—a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered【C7】______ the birth of deformed children or even grandchildren.
We simply do not know yet how men are going to get on when they spend weeks and months outside the【C8】______ of the atmosphere, working in a space laboratory. Drugs might help to【C9】______ the damage done by radiation, but no really【C10】______ ones have been found so far.
【C7】
选项
答案
E
解析
空格所在句讲什么时候发现辐射的危害。备选项中的介词until与否定词构成not...until“直到……才”结构,符合句意,故选E。
转载请注明原文地址:https://jikaoti.com/ti/xaiMFFFM
0
专业英语四级
相关试题推荐
Howmanypartnersarethereinthisproject?
WhichofthefollowingisNOTmentionedinthenews?
Whichofthefollowingdoesthemanorder?
OneofthecomponentsofTheSouthsidePovertyAlleviationProjectwhichwasimplementedin2012wastheimprovementontheEast
A、Heshouldbeanexcellentteamplayer.B、Heshouldcooperatewithassistantengineersasateam.C、Heshouldtreatmaleandfe
Thestrongerachild’svocabulary,themoresuccessfulshetendstobeinschool,andnewresearchshowsthattheword-building
DeltaGoodremsaysshe’slearntalotoverthepastfewyears.Butonelittlenuggetofwisdomshe’llbetakingwithherwhensh
Asmyexamsarecomingnextweek,I’lltakeadvantageoftheweekendto______onsomereading.
(1)Thefirstdayofschoolourprofessorintroducedhimselfandchallengedustogettoknowsomeonewedidn’talreadyknow.Is
随机试题
A、Itcangreatlyimprovetheirlearningefficiency.B、Itcanhelpthemtointeractmorewithteachers.C、Itcansavetheirtroub
臂丛神经的组成是:()
蛛网膜下腔出血根除病因、防止复发的有效方法是
用显微鉴别法鉴别黏液选用的试剂是()
(2009)下列关于开发利用太阳能的论述中,何者是不妥的?
2月14日,甲公司向乙公司签发了一张50万元的同城支票,付款人为甲公司开户行A银行。乙公司取得支票后,背书转让给丙公司,丁公司为乙公司提供保证。3月1日,丙公司请求A银行付款,A银行以甲公司存人票款不足为由拒绝付款。根据票据法律制度的规定,丙公司无权向(
A、Becausetheydon’tlikeit.B、Becausetheyareworriedaboutit.C、Becausebeingarmedisforeigntotheirnature.D、Becauset
Whatisthemainsubjectofthispassage?Thisarticleconcludesthat______contributetotheremarkablelonglifeofthesepe
RecentlyBroadpointCommunications,afledg-ling(刚起步的)mediacompany,startedhandingoutfreelong-distancetelephonecalls.In
1.机动车被看作是空气污染的首要原因2.提出解决这一问题的方法3.并说明原因OneWaytoSolvetheProblem
最新回复
(
0
)