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 u
Evolutionary theories. The Belgian George Lemaitre proposed the idea that about 20,000 million years ago all the matter in the u
admin
2009-06-24
76
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 steadystate theory in its original form at least—must be rejected.
选项
A、That new material is continually being formed.
B、That, in time, the universe will contract.
C、That the universe is expanding at present.
D、That" a big bang" started the expansion.
答案
A
解析
由全文对两种理论对比看,其他三个选项均不是两种理论共有的论点。
转载请注明原文地址:https://kaotiyun.com/show/d0Td777K
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
TheDevelopmentofAmericanPostalSystemIntheearlydaysoftheUnitedStates,postalchargeswerepaidbytherecipient
Whichofthefollowingdoesthefirstparagraphimply?Whatdoestheauthorconclude?
StandardEnglishisthevarietyofEnglishwhichisusuallyusedinprintandwhichisnormallytaughtinschoolsandtonon-nat
StandardEnglishisthevarietyofEnglishwhichisusuallyusedinprintandwhichisnormallytaughtinschoolsandtonon-nat
WhichofthefollowingisNOTmentionedasaproblemforofficeemployees?Whichofthefollowingisanexampleoftelecommutin
WhichofthefollowingisNOTtrueaboutdomesticviolence?Itcanbeinferredfromthecontextthatthephrase"standshergro
AstronomersbelievethatmatterindifferentpartsoftheuniverseAttheendofthepassagetheauthorsuggeststhat
TheAmericanFamilyIntheAmericanfamilythehusbandandwifeusuallyshareimportantdecisionmaking.Whenthechildrenar
Accordingtowhatsomepeoplesay,theinternationalcommunity______.Inthethirdparagraph,thewriterimpliesthat______.
Themostcrucialproblemanyeconomicsystemfacesishowtouseitsscarceresources.
随机试题
我国对资本主义工商业的社会主义改造,主要是通过国家资本主义的途径,国家资本主义的高级形式是()。
A.ATPB.2,3-二磷酸甘油酸C.磷酸肌酸D.糖原肌肉和脑组织的能量储存形式是
女性,65岁,因急性化脓性阑尾炎阑尾穿孔急诊行手术治疗,出院后2个月饱餐后出现腹胀、腹痛、呕吐,呕吐物为胃内容物。查体:全腹膨隆,有轻压痛,无反跳痛及肌紧张。出现该并发症的可能原因是( )。
A.以DNA为模板合成DNA B.以RNA为模板合成cDNA C.以DNA为模板合成mRNA D.以mKNA为模板合成蛋白质 E.某一基因型细胞吸收另一基因型细胞DNA反转录是指
A、固化时收缩B、固化期15分钟C、固化期轻膨胀D、与牙齿有化学结合E、固化时体积无变化光固化复合树脂
下列关于企业现金流量分析的表述,不正确的是()。
智商(IQ)等于________与________之比乘以100。
甲乙结伴从海拔5200米的大本营开始登山,他们每小时可上升的海拔为200米,已知每人最多可以携带一个人24小时用的氧气。如果可以将部分的氧气存放途中以备返回时取用,那么请问,其中一人最多可以爬到海拔多高的位置?()
在数据库系统中,下列哪个映像关系用于提供数据与应用程序间的逻辑独立性______。A)外模式/模式B)模式/内模式C)外模式/内模式D)逻辑模式/内模式
若查找某个字段中以字母A开头且以字母Z结尾的所有记录,则条件表达式应设置为
最新回复
(
0
)