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
44
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 turned
B worked
C led
D attempted
答案
C
解析
lead to是一个固定词组,意思是“导致……”。
转载请注明原文地址:https://ti.zuoweng.com/ti/ad9QKKKQ
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...
WhatIstheCoolestGasintheUniverse? Whatisthecoldestairtemperature...
DarkForcesDominateUniverse Theearth,moon,sunandallvisiblestarsin...
DarkForcesDominateUniverse Theearth,moon,sunandallvisiblestarsin...
随机试题
红细胞数或血红蛋白分别超过的人员不宜从事放射性工作 A.400万/mm3,12
题目说甲银行向乙银行的赵某买了理财,快到期甲向乙提示兑现却被告知没有该款产品,不
下列筹资方式中,属于商业信用筹资方式的是()。(2015)
在编制房地产开发项目的可行性研究报告过程中,()是可行性研究中定量分析的基础。
一足部患有严重溃疡的糖尿病病人,经治疗病情未减轻,且有发生败血症的危险,此时为保证病人的生命而需要对病人截肢。这里包含的冲突是A.有利原则与公正原则的冲突B.
促进国际货币领域的合作和汇率稳定,帮助成员国调整和平衡国际收支,是下列各国际性金融机构中()的服务宗旨。A.国际清算银行B.世界银行集团C.国际货币基金组
就有效的操作技能的形成而言,模仿需要以()为基础。 A.认知B.知识 C.智力D.练习
热原质是革兰阴性菌的A:脂蛋白B:脂质双层C:脂多糖D:核心多糖E:特异性多糖
铁路车站按照办理的运输业务不同,可以分为()。 A.货运站 B.综合站 C.中间站 D.编组站 E.客运站
共用题干 重庆两江通衢,交通便利,是西南地区的物资集散地和长江上游最具活力的商贸中心。由于独特的地理位置,已初步建立起面向全国、联动长江、辐射西南、层次...