首页
登录
职称英语
共用题干 Dark Forces Dominate UniverseThe e
共用题干 Dark Forces Dominate UniverseThe e
最全题库
2022-08-02
14
问题
共用题干Dark Forces Dominate Universe
The earth,moon,sun and all visible stars in the sky make up less than one percent of
the universe.Almost all the rest is dark matter and dark energy,unknown forces that
_______(1)astronomers.
Observations in recent years have changed the basic_______(2)of how the
universe evolved and have indicated how little is known about the major forces and
substances that_______(3)our world.
Astronomers now know that luminous(发光的)matter一stars , planets and hot gas一
accounts_______(4)only about 0.4 percent of the universe.Non-luminous
components , such as black holes and intergalactic(星系间的)gas,_______(5)
up 3.6 percent.The rest is either dark matter,about 23 percent,or dark energy,about
73 percent.
Dark matter,sometimes_______(6)"cold dark matter,"has been known for some time.Only recently have researchers come to understand the key role it_______ (7)in the formation of stars,planets and even people.
"We_______(8)our very existence to dark matter,"said physicist Paul
Steinhardt and a co-author of a review on dark matter which_______(9)not long ago
in the journal Science.
"Dark matter dominated the structure_______(10)in the early universe,"
Steinhardt said."For the first few billion years dark matter contained most of the mass of the
universe. You can think of ordinary matter_______(11)a froth(泡沫)of an ocean
of dark matter. The dark matter clumps(结成块)and the ordinary matter falls into it. That
_______(12) to the formation of the stars and galaxies(星系)."
Without dark matter,"there would be virtually no structures in the universe,"
The nature of dark matter is_______(13).It cannot be seen or detected
directly. Astronomers know it is there because of its_______(14) on celestial(天体
的)objects that can be seen and measured.
But the most dominating force of all in the universe is called dark energy,a recently
________(15)power that astronomers say is causing the galaxies in the universe to
separate at a faster and faster speed._________(8)A:believe B:owe C:feel D:regard
选项
_________(8)
A:believe
B:owe
C:feel
D:regard
答案
B
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/1492031.html
本试题收录于:
理工B题库理工类分类
理工B
理工类
相关试题推荐
共用题干 第二篇“Lucky"LordLucan一AliveorDea
共用题干 第二篇“Lucky"LordLucan一AliveorDea
共用题干 第二篇“Lucky"LordLucan一AliveorDea
共用题干 第一篇OntheTrailoftheHoneyBadge
共用题干 第一篇OntheTrailoftheHoneyBadge
共用题干 第一篇OntheTrailoftheHoneyBadge
共用题干 TrafficJams一NoEndinSight1Traf
共用题干 TrafficJams一NoEndinSight1Traf
共用题干 TrafficJams一NoEndinSight1Traf
共用题干 TrafficJams一NoEndinSight1Traf
随机试题
TheEuropeanUnionhadapprovedanumberofgeneticallymodifiedcropsunt
[originaltext]Manyyoungpeoplestruggletogetagoodnight’ssleepwhich
A.risenB.smoothC.friendlyD.exceedingE.rapidF.varyG.expensiv
以下属于跨期套利的是()。A、卖出A期货交易所4月锌期货合约,同时买入A期货交易所6月锌期货合约B、卖出A期货交易所5月大豆期货合约,同时买入A期货交
关于胎盘合成的耐热性碱性磷酸酶的叙述,错误的是A.由胎盘合体滋养细胞分泌 B.
诊断阻塞性肺气肿,最有价值的是A.PaO2低于正常 B.残气量/肺总量>4
电子地图是由硬件、软件、数据和人员等部分组成。下列软件属于核心软件的是(
1.简要分析学习策略的概念。 2.列举影响课堂管理的因素。 3.认知发展与教
有关“智者”的描述有误的是( )A.推动了文化传播 B.拓宽了学术研究领域
(2018年真题)根据《期货公司风险监管指标管理办法》,以下对风险监管指标预警标
最新回复
(
0
)