首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
Dark Forces Dominate Universe The earth, moon, sun and all visible stars in ...
Dark Forces Dominate Universe The earth, moon, sun and all visible stars in ...
admin
2020-12-24
54
问题
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 _______(51) astronomers.
Observations in recent years have changed the basic_______(52) of how the universe evolved and have indicated how little is known about the major forces and substances that _______(53) our world.
Astronomers now know that luminous (发光的)matter — stars, planets and hot gas — accounts_______(54) only about 0. 4 percent of the universe. Non-luminous components,such as black holes and intergalactic (星系间的)gas, ______ (55) up 3. 6percent. The rest is either dark matter, about 23 percent, or dark energy, about 73 percent.
Dark matter, sometimes_______(56) “cold dark matter”,has been known for some time. Only recently have researchers come to understand the key role it_______(57) in the formation of stars, planets and even people.
“We_______(58) our very existence to dark matter,” said physicist Paul Steinhardt and a co-author of a review on dark matter which_______(59) not long ago in the journal Science.
“Dark matter dominated the structure_______(60) 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_______(61) 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_______(62)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_______ (63). It cannot be seen or detected directly.
Astronomers know it is there because of its_______(64) 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_______ (65) power that astronomers say is causing the galaxies in the universe to separate at a faster and faster speed.
选项
A seized
B proven
C caught
D grasped
答案
B
解析
暗物质是被科学家们证明存在的一个能量。这种能量正影响着整个宇宙。被证明的: proven。其他几个选项与文意不符。
转载请注明原文地址:https://ti.zuoweng.com/ti/8d9QKKKQ
相关试题推荐
Theinvisiblehandusuallyleadsmarketstoallocateresourcesefficiently.()A.a
Thestudyshowsthatjoyisnotuniquetohumanbeings.A:universe B:specialC:s
WhatIstheCoolestGasintheUniverse? Whatisthecoldestairtemperature...
WhatIstheCoolestGasintheUniverse? Whatisthecoldestairtemperature...
WhatIstheCoolestGasintheUniverse? Whatisthecoldestairtemperature...
WhatIstheCoolestGasintheUniverse? Whatisthecoldestairtemperature...
WhatIstheCoolestGasintheUniverse? Whatisthecoldestairtemperature...
DarkForcesDominateUniverse Theearth,moon,sunandallvisiblestarsin...
DarkForcesDominateUniverse Theearth,moon,sunandallvisiblestarsin...
DarkForcesDominateUniverse Theearth,moon,sunandallvisiblestarsin...
随机试题
一早产男婴,重1350g,出生后住在隔离病室。对该患儿应采取的隔离是 A、接触
关于国内企业境外上市的条件,下列说法正确的有()。
A.双方冲突型 B.主动-被动型 C.患者主导型 D.共同参与型 E.指导-合作型对婴幼儿、处于休克状态需要急救等患者适用的模式是()
碘酊用于口腔内消毒剂的浓度是A.0.5%B.1.5%C.2.0%D.2.5%E.1%
汽油:煤油:柴油A.生米:熟米:糙米B.牛奶:酸奶:羊奶C.步兵:骑兵:伞兵D.瓦工:电工:小工
能养肺胃之阴,兼可治热伤心阴的药物是A.石斛B.北沙参C.玉竹D.天冬E.黄精
A公司的法定代表人为张某,2015年4月1日法定代表人变更为李某,则A公司应当办理的是()。A.设立登记B.变更登记C.停业登记D.注销登记
来源于毛茛科植物的药材是A.太子参B.黄芪C.何首乌D.大黄E.黄连
以下说法不正确的是A.不同药物制剂所含有效成分相等时,药物效应强度也相等B.同一药物的不同剂型吸收速率和分布的范围可以不同C.药物不同剂量产生的药物作用也是
慢性骨髄炎的表现A皮肤淤斑B功能障碍C异常活动D死骨形成E肿胀疼痛