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
2018-03-16
45
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.
What is the basic difference between the two classes of theories?
选项
A、It concerns the place and time of the formation of matter.
B、It is whether the universe will continue to expand or not.
C、It is the current state of the universe.
D、The variations on evolutionary theories cause the difference.
答案
B
解析
由第一段最后一句“However,basically,evolutionary theories take it that…has been expanding, ever since.”可知,两种理论的根本区别在于对“宇宙是否会继续膨胀?”这一问题的不同看法。
转载请注明原文地址:https://kaotiyun.com/show/0DWd777K
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
Nomatterwhatyoursituationis’,oneofthegreatestdangersnowisthatyou’llstopdoingwhatyou’realreadydoingright.
WiththerapideconomicdevelopmenttheseyearsinChina,aproblemfollows:theeverbroadeninggapbetweencityandcountrysid
InJapanyoushouldholdabusinesscardwith______andreadthenameandriflecarefully.
InJapanyoushouldholdabusinesscardwith______andreadthenameandriflecarefully.
Accordingtothepassage,thegreatestpartofthesolarenergythatreachestheEarthis______.Itcanbeconcludedfrominfo
OnehundredandthirteenmillionAmericanshaveatleastonebank-issuedcreditcard.Theygivetheirownersautomatic(31)ins
OnehundredandthirteenmillionAmericanshaveatleastonebank-issuedcreditcard.Theygivetheirownersautomatic(31)ins
TherecentsocialandeconomicchangesintheU.S.havegreatimpactonalltheAmericanhousingsystem.
Wherecantheexpression"lameduck"beheard?
WhendidDr.Hubergethisowntelescope?
随机试题
我们应该运用马克思主义世界观、方法论来研究行政组织理论。()
患者,狂证初发,狂乱无知,呼号怒骂,不避亲疏,舌质红绛,苔黄腻,脉弦大滑数。方选
A.反转录酶B.端粒酶C.末端转移酶D.甲基转移酶E.连接酶真核生物染色体中具反转录作用的是
以下局部急救处理冲洗溶液中,最适宜处理皮肤接触铬酸的是()
某项目采用赢得值法进行综合分析后得到:BCWP>BCWS>ACWP,则()。
在习惯化形成之后,如果换一个新的不同刺激,婴儿反应又会增强。这是()。
路由器根据所收到的数据包头的源MAC地址进行转发。()
Adriverwhoisdrivingthebusmustn’ttalkwithothersorbeabsent-minded.
某县因政府决策失误和腐败分子肆意贪污而发生了一起大桥坍塌事故,造成几十人死伤。事故发生的第二天晚上,在全县干部会议上,县委一位主要领导明确提出了“看好自己的人,管好自己的嘴”的四条纪律,并以内部文件方式下发:一不准公务员及其家属参加围观,否则一律开除公职;
Mostoftheanimalshavelittleconnectionwithanimalsofadifferentkind,unlesstheyhuntthemforfood.Sometimes,however,
最新回复
(
0
)