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
53
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 with
B as
C from
D beside
答案
B
解析
此题应从结构方面考虑。think ... as ...的意思是“把……视为……”。
转载请注明原文地址:https://ti.zuoweng.com/ti/Qd9QKKKQ
相关试题推荐
WhatIstheCoolestGasintheUniverse? Whatisthecoldestairtemperature...
WhatIstheCoolestGasintheUniverse? Whatisthecoldestairtemperature...
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
根据货币时间价值概念,下列不属于货币终值影响因素的是( )。 A.计息的
(140-141题共用备选答案) A.J00-J99 B.S00-T98
4、女性,29岁,分娩时大出血,出现淡漠、呆滞、话少、思维迟钝、活动减少,闭经,
工程咨询公司以投资项目的机会研究、可行性研究、工程技术与经济性咨询服务工作为主,
《变电运维管理规定第3分册组合电器运维细则》:组合电器发生气体泄漏,在事故发生后
课程管理有审定制、国定制和多样化自由选择几种模式,课程一般结构发生变化,则体现
单核细胞病理性增多见于A:急性感染的恢复期B:组织移植排斥反应C:传染性淋巴细胞增多症D:过敏性鼻炎E:结核病
关于确定中标人,下列说法错误的是( )。A.招标人根据评标委员会提出的书面评标报告和推荐的中标候选人确定中标人B.招标人和中标人应当自中标通知书发出之日起
推动式库存管理中的主要问题有()。A:在每一个存储点需要保持多少库存B:一批生产或采购应分配到各个存储点的库存是多少C:超过需求的供给量在各存储点之间怎样分
甲公司持有乙公司30%的股权,能够对乙公司施加重大影响。20×2年度乙公司实现净利润8000万元,当年6月20日,甲公司将成本为600万元的商品以10...