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
They were by far, the largest and most distant objects that scientists had ever detected: a strip of enormous cosmic clouds some
They were by far, the largest and most distant objects that scientists had ever detected: a strip of enormous cosmic clouds some
admin
2010-07-06
32
问题
They were by far, the largest and most distant objects that scientists had ever detected: a strip of enormous cosmic clouds some 15 billion light-years from earth. 61)
But even more important, it was the farthest those scientists had been able to looks into the past , for what they were seeing were the patterns and structures that existed 15 billion years ago.
That was just about the moment that the universe was born. What the researchers found was at once both amazing and expected: the US National Aeronautics and Space Administrations Cosmic Background Explorer satellite (COBE) had discovered landmark evidence that the universe did in fact begin with the primeval explosion that has become known as the Big Bang (the theory that the universe originated in an explosion from a single mass of energy).
62)
Tile existence of the giant clouds was virtually required for the Big Bang, first put forward in the 1920s, to maintain its reign as the dominant explanation of the cosmos.
According to the theory, the universe burst into being as a submicroscopic, unimaginably dense knot of pure energy that flew outward in all directions, emitting radiation as it went, condensing in to particles and then into atoms of gas. Over billions of years, the gas was compressed by gravity into galaxies, stars, plants and eventually, even humans.
COBE is designed to see just the biggest structures, but astronomers world like to see much smaller hot spots as well, the seeds of local objects like clusters and superclusters of galaxies. They shouldn’t have long to wait. 63)
Astrophysicists working with ground-based detectors at the South Pole and balloon-borne instruments are closing in on such structures, and may report their findings soon.
64)
If the small hot spots look as expected, that will be a triumph for yet another scientific idea, a refinement of the Big Bang called the inflationary universe theory.
Inflation says that very early on, the universe expanded in size by more than a trillion fold in much less than a second, propelled by a sort of antigravity. 65 )
Odd though it sounds, cosmic inflation is a scientifically plausible con- sequence of some respected ideas in elementary-particle physics, and many astrophysicists have been convinced for the better part of a decade that it is true.
选项
答案
天体物理学家使用南极陆基探测器及球载仪器,正越来越近地观测这些云系,也许不久会报告他们的观测结果。
解析
转载请注明原文地址:https://kaotiyun.com/show/D0Dd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Howcanforeign-traineddoctorsgetapprovedfromtheEducationalCommissiontocompletearesidencyintheU.S.?WhathaveAm
Couldthebadolddaysofeconomicdeclinebeabouttoreturn?SinceOPECagreedtosupply-cutsinMarch,thepriceofcrudeoil
WhoearnslessintheUnitedStatesthanthoseinmanyindustrializedcountries?ThereportisnowcoveringmuchofJapan,Sout
Howdoestherisingpopulationnegativelyinfluencesomecountries?
"TheBritishtrialsystemismorelikeagamethanaseriousattempttodojustice"(Lines2~3,Paragraph1)impliesthat______
Veryearlyinthemorning,beforedaybreakforthegreaterpartoftheyear,themenwouldthrowontheirclothes,breakfaston
Whatisthemarketingconceptdiscussedinthepassage?
Predictionsofmanyrobotsinindustryhaveyetcometrue.Fortenyearsormore,manufacturersofbigrobotshaveexplainedhow
Whatwillbethoughtaboutmostlywhenonewantstofindajobaccordingtothedialogue?
随机试题
精馏工序停车时,下面正确做法是()。
患者47岁,G2P1,月经规律,接触性出血3年,妇科检查:宫颈中度糜烂,宫体无异常,附件无异常
婴儿腹泻重度脱水的主要诊断依据是
下面哪一些不属于建立企业总法律顾问的基本原则()。
证券投资基金的参与主体主要是基金发起人、基金管理人、()。
某企业在审查和评估自身安全绩效时,除使用事故发生率等消极指标外,还应使用旨在对安全绩效给予直接认可的积极指标,该公司的做法所体现的安全文化建设基本要素是()。
募集机构应当(),防范利益冲突,履行说明义务、反洗钱义务。Ⅰ.恪尽职守Ⅱ.诚实守信Ⅲ.兢兢业业Ⅳ.谨慎勤勉
某冶金联合企业矿山2005年11月开采铁矿石5000吨,本月销售4000吨,单位税额为14元/吨,则其当月应纳的资源税额为()。
,()
Inthispart,theinterlocutorasksquestionstoeachofthecandidatesinturn.Youhavetogiveinformationaboutyourselfand
最新回复
(
0
)