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
Evolutionary theories. The Belgian George Lemaitre proposed the idea that about 20, 000 million years ago all the matter in the
Evolutionary theories. The Belgian George Lemaitre proposed the idea that about 20, 000 million years ago all the matter in the
admin
2019-10-21
60
问题
Evolutionary theories. The Belgian George Lemaitre proposed the idea that about 20, 000 million years ago all the matter in the universe—enough, he estimated, to make up a hundred thousand million galaxies—was all concentrated in one small mass, which he called the "primeval atom". This primeval atom exploded for some reasons, sending its matter out in all directions, and as the expansion slowed down, a steady state resulted, at which time the galaxies formed. Something then upset the balance and the universe started expanding again, and this is the state in which the universe is now. There are variations on this theory: it may be that there was no steady state. However, Basically, evolutionary theories take it that the universe was formed in one place at one point in time and has been expanding ever since.
Will the universe continue to expand? It may be that the universe will continue to expand for ever, But some astronomers believe that the expansion will slow down and finally stop. Thereafter the universe will start to contract until all the matter in it is once again concentrated at one point. Possibly the universe may oscillate for ever in this fashion, expanding to its maximum and then contracting over again.
The steady-state theory. Developed at Cambridge by Hoyle, Gold and Bodi, the steady-state theory maintains that the universe as a whole has always looked the same and always will. As the galaxies expand away from each other, new material is formed in some ways between the galaxies and makes up new galaxies to take place of those which have receded. Thus the general distribution of galaxies remains the same. How matter could be formed in this way is hard to see, But no harder than seeing why it should all form in one place at one time.
How can we decide which of these theories is closer to the truth? The method is in principle quite simple. Since the very distant galaxies are thousands of millions of light years away, then we are seeing them as they were thousands of millions of years ago. If the evolutionary theory is correct, the galaxies were closer together in the past than they are now, and so distant galaxies ought to appear to be closer together than nearer ones. According to the steady-state theory there should be no difference.
The evidence seems to suggest that there is a difference, that the galaxies were closer together than they are now, and so the evolutionary theory is partially confirmed and the steady-state theory—in its original form at least— must be rejected.
According to Hoyle and his friends at Cambridge, ______.
选项
A、the explosion occurred much earlier than Lemaitre suggested
B、it is hard to see how matter could be formed in this way
C、the expansion of the universe is not a real one
D、new material is continually being created
答案
D
解析
由短文第三段可知, 剑桥的Hoyle和他的朋友认为,新物质一直在被创造。
转载请注明原文地址:https://kaotiyun.com/show/QqWd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
Youhavereadanarticleinamagazinewhichstates,"Economicdevelopmentwillinevitablygenerateindustrialwastewhichintu
Pollutionisa"dirty"word.Topollutemeanstocontaminate—tospoilsomethingbyintroducingimpuritieswhichmake(31)unfit
Answerquestionsbyreferringtothecommentson3differenttheoriesofchilddevelopmentandlearning.Note:Whenmoretha
Americanscientistsinvarietyofdisciplinescontinuetostruggletostart______.
ThespeakerknowsafewChinesestudents.
PeoplecanonlyobtaininformationabouttheSevenWondersoftheWorldintheprintedencyclopedias.
Inthepasttherewasno"directed"research______.Howisthesituationlikelytoaffectthefutureofscience?
WhichofthefollowingstatementsaboutthetelephoneofthefutureisNOTtrue?
Impatiencecharacterizesyoungintellectualworkers.Theywanttomaketheirmark(31).Soit’simportanttoget(32)tothemin
Cyberspace,datasuperhighway,multimedia—forthosewhohaveseenthefuture,thelinkingofcomputers,televisionandtelephone
随机试题
进行组织培养时应注意()
下列关于boolean类型的叙述中,正确的是()。
A.肝B.心C.脾D.肺E.肾中医学认为,与人体的生长与发育关系最密切的脏是
单位工程竣工成本分析,应包括的内容是()。
以下贷款方式中,银行不用承担贷款风险的有()。
教师在对幼儿的学习与发展进行评价时应注意哪些方面?
Asoneofthebest-knownAmericanauthorsof20thcentury,ErnestHemingwaywroteallthefollowingnovelsEXCEPT______.
某书画装裱店与著名书法家赵某签订了一份委托书法作品创作合同。双方约定,赵某交付装裱店20副对联作品,装裱店支付赵某5000元报酬。赵某因不慎跌倒致使右臂受伤,不能创作,于是他委托他儿子代为书写了全部对联,以此交付装裱店,装裱店支付了全部报酬。但是不久装裱店
一切有利于生产力发展的方针政策都是符合人民根本利益的,改革开放有利于生产力的发展,所以改革开放是符合人民根本利益的。以下哪种推理方式与上面的这种论述最为相似?
A、Becausethereplanesflyhigherthanattheequator.B、Becausetheretheeyescanreachabout4,000metres.C、Becausetherepl
最新回复
(
0
)