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
2016-11-25
55
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 Lemaitre, the separate galaxies formed______.
选项
A、during a pause in the expansion of the universe
B、at the time of the primeval explosion
C、and will continue to form for ever
D、when all the matter in the universe was all concentrated in one small mass
答案
B
解析
由第一段中的“This primeval atom exploded for...at which time the galaxies formed.”可知。
转载请注明原文地址:https://kaotiyun.com/show/A2Wd777K
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
Thefitnessmovementthatbeganinthelate1960sandearly1970scentered(31)aerobicexercise.Millionsofindividualsbecame
Thefitnessmovementthatbeganinthelate1960sandearly1970scentered(31)aerobicexercise.Millionsofindividualsbecame
Youmaysaythatthebusinessofmarkingbooksisgoingtoslowdownyourreading.(31)probablywill.That’soneofthe(32)fo
Youmaysaythatthebusinessofmarkingbooksisgoingtoslowdownyourreading.(31)probablywill.That’soneofthe(32)fo
Hotelswere(31)theearliestfacilities(32)boundtheUnitedStatestogether.Theywerebothcreaturesandcreatorsofcommuni
Hotelswere(31)theearliestfacilities(32)boundtheUnitedStatestogether.Theywerebothcreaturesandcreatorsofcommuni
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanyco
WhatdidMarkdototellpeopleabouthisopinionsonvariousissues?
A、TheStudentUnion.B、TheStudentEmploymentOffice.C、TheWorkers’Union.D、TheStudentPart-timeJobOffice.B
HowdoesAusubelfeelaboutthescientificprogressmadeeveryday?Providingtechnicalsolutionstoclimatechangemightbeea
随机试题
下列关于创客空间的运行模式的说法中正确的是
女孩,16岁,近10个月来右上腹痛频繁伴黄疸,且逐渐加重,大便呈陶土色,消炎利胆治疗无好转。患儿生后6天曾行先天性胆总管囊肿十二指肠吻合术。此患儿应考虑哪种合并症
患者,女性,33岁,上腹痛已1天,能忍受,但今中午进食后疼痛剧烈,伴有呕吐,吐后疼痛不缓解,疑为急性胰腺炎。病情处理不当可能会出现
张某继承了一套商铺,在办理产权登记前就以300万元的价格卖给了李某,并由李某使用。张某在办理了产权登记后,又以380万元的价格将这套商铺卖给王某,并办理了过户手续。对此,下列选项中正确的说法是()。
下列各项中标点符号使用正确的是()
行政许可中,受委托组织应是依法成立的管理公共事务的事业组织。()
有关绘图,下面的说法正确的是()。Ⅰ:drawArt(intx,inty,intwidth,intheight,ingstanAngle,intarcAngle)是用来指定在矩形的边界内从起始角度到结束角度之间画弧。Ⅱ:
如果一个菜单项的Enabled属性被设置为False,则程序运行时,该菜单项( )。
DearMs.Emily,TheneedforabiologyteacherintheHeavilonCommunitySchoolswasindicatedinthePurdueUniversityEduc
IndealingwithstrangerstheruleforBritishsocietyisthatyoumustavoidstaringatthematthesametimeavoidignoringth
最新回复
(
0
)