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
52
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
依据《国务院关于预防煤矿生产安全事故的特别规定》,被责令停产整顿的煤矿应当制定整
按人民币计算,某进口设备的离岸价6000万元,到岸价6500万元,银行财务费25
根据中央关于加快水利改革发展的决定,关于水利改革发展的基本原则的说法,正确的有(
某外贸公司在缴纳了100万元的税款后,采取虚报出口的手段,骗得税务机关退税180
工资支付的一般规则是( )。A.货币支付B.直接支付C.委托支付D.全额支付E.按时支付
Passage1 Alyricisasubjectivepoemofintensepersonalemotionwhosepri...
1~5岁儿童用药剂量折算是A.成人剂量的1/2B.成人剂量的1/5C.成人剂量的1/8D.成人剂量的1/4E.成人剂量的2/3
下列项目变更时不必办理《麻醉药品、第一类精神药品购用印鉴卡》变更手续的是A.医疗机构负责人B.医疗管理部门负责人C.药学部门负责人D.具有麻醉药品处方审核
对于一些工程量较小、工艺比较简单的工程,适用的施工图预算审查方法是( )。A、全面审查法B、标准预算审查法C、分组计算审查法D、重点审查法
某进口商进口大米2000袋,有1200袋为一级品,每袋价值120元;有800袋为二级品,每袋价值80元。该进口商投保了海上货物运输一切险,投保金额为16...