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
题库
2022-08-02
44
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._________(5)A:make B:keep C:set D:get
选项
_________(5)
A:make
B:keep
C:set
D:get
答案
A
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/1492028.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
共用题干 KickingtheHabitWhatisabadhab
共用题干 KickingtheHabitWhatisabadhab
随机试题
Thenuclearpolyhedrosisvirushelpscontrolgypsymothpopulationsbykillingt
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesame
By1817theUnitedStatesCongresshaddoneawaywithallinternaltaxesandwas
UnlikethecarefullyweighedandplannedcompositionsofDante,Goethe’swri
小学美术《草丛中》
SMTP协议被封装在()协议中,默认侦听的端口号是(请作答此空)。A.25
儿童在游戏时没有固定的模式,可以自由表达自己的内心。尽情显露内在的潜力,说明了儿
动机冲突按表现形式可分为()、()和()。
教育心理学与儿童心理学的不同之处在于( )。 A.教育心理学从横向角度研究儿
甲、乙订立买卖合同,甲卖某型号钢材5吨给乙。但是,在合同订立时,甲并没有此型号钢
最新回复
(
0
)