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
67
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/LqWd777K
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
Pollutionisa"dirty"word.Topollutemeanstocontaminate—tospoilsomethingbyintroducingimpuritieswhichmake(31)unfit
ArecenttrialhasgotridofAmerican’sinterestintheproblemofviolenceagainstwomen.
______hasadriverseatthatcanbeadjustedtofitmostpeople?______hasitshandbookcriticised?
______hasadriverseatthatcanbeadjustedtofitmostpeople?______allowseasyaccesstothebackseats?
ThespeakerknowsafewChinesestudents.
ThespeakerknowsafewChinesestudents.
PeoplecanonlyobtaininformationabouttheSevenWondersoftheWorldintheprintedencyclopedias.
Mirrorimagesisoftendifferentfromthe"feltimages".
Impatiencecharacterizesyoungintellectualworkers.Theywanttomaketheirmark(31).Soit’simportanttoget(32)tothemin
Notlongago,amysteriousChristmascarddroppedthroughourmailslot.TheenvelopewasaddressedtoamannamedRaoul,who,I
随机试题
患者,女性,75岁。既往有糖尿病史25年。今晨排便时突发胸闷、面色苍白、大汗淋漓,口服硝酸甘油天缓解。体格检查:心率103次/分,血压90/68mmHg。根据病史,目前最可能的诊断是
肺结核出现胸痛是因为
下列哪项属于遗传性溶血性贫血?()
(2005年)固定成本是总成本费用的一部分,它是指其中的()。
下列属于“所有者权益”类科目包括的内容是()。
根据城镇土地使用税法律制度的规定,下列属于城镇土地使用税计税依据的是()。
社会工作者直接表达自己不同的看法、直接指出服务对象某种行为可能带来的不良的后果等,都属于心理社会模式中的( )技巧。
教育要发展人的个性就是把人的独特性、差别性与_______表现出来。
简述拉美独立战争的历史背景及其历史意义。
Theevolutionofsexratioshasproduced,inmostplantsandanimalswithseparatesexes,approximatelyequalnumbersofmalesa
最新回复
(
0
)