首页
登录
职称英语
[originaltext] Today most astronomers accept the notion that groups of stars
[originaltext] Today most astronomers accept the notion that groups of stars
游客
2024-05-02
33
管理
问题
Today most astronomers accept the notion that groups of stars that make up the universe are all moving farther and farther away from each other, but until very recently this idea of an expanding universe was not a theory most European scholars believed in since ancient times. And up to about the 17th century most of these scholars thought the size of the universe has remained unchanged since the moment of its creation or perhaps forever, with all the stars remaining more or less in place in relation to each other, but that was challenged in the late 17th century by Issac Newton’s idea of gravity as a force of attraction, which contradicted the idea of a universe that is static, unchanging. If gravity causes all the stars out there in space to attract each other as Newton said, then they couldn’t remain motionless. Sooner or later all the stars will fall in towards each other. Well, scientists then propose a new model. Taking Newton’s theory into account, they didn’t want to abandon the idea of motionless status, but for this model to work, they had to modify Newton’s law of gravity, so they theorized that for distance as large as those between stars, the gravitation force repels rather than attracts. As you might guess, there are other contradictions. But this is pretty resolved by the currently accepted theory, which says the universe is continuously expanding. You’ll be reading all about that as your homework tonight.
26. What does the speaker say about most astronomers today?
27. What did most European scholars believe about the size of the universe before 17th century?
28. What did some scientists try to explain by suggesting that stars repel each other?
选项
A、Why stars are moving farther apart.
B、Why stars attract each other.
C、Why stars don’t fall in towards each other.
D、Why stars remain motionless.
答案
C
解析
短文提到,根据牛顿的万有引力法则,星球迟早会与其他星球聚集。一些科学家提出了一个新的模式,他们不愿摒弃宇宙不运动的想法,因而不得不修改牛顿的万有引力法则。他们认为星球之间相互排斥而不是吸引。这么一来,他们需要对这一理论进行解释了。C为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3580829.html
相关试题推荐
[originaltext]Itravelalot,andIfindoutdifferent"style"ofdirection
[originaltext]AfriendgaveGeorgeaparrotwhichhadabigvocabulary,but
[originaltext]AfriendgaveGeorgeaparrotwhichhadabigvocabulary,but
[originaltext]AskatypicalAmericantonamethebiggestbusinessintheUn
[originaltext]AskatypicalAmericantonamethebiggestbusinessintheUn
[originaltext]W:Haveyoueverattendedagroupinterview?Imeananinterview
[originaltext]W:Haveyoueverattendedagroupinterview?Imeananinterview
[originaltext]W:Haveyoueverattendedagroupinterview?Imeananinterview
[originaltext]W:Tellmealittlebitaboutyourself,please.M:MynameisDav
[originaltext]W:Tellmealittlebitaboutyourself,please.M:MynameisDav
随机试题
Expertsestimatethatsomewherebetween【B1】______and【B2】______ofeverythingw
AustralianminingentrepreneurClivePalmeronTuesdayunveiledblueprintsf
IstheBanonAbusiveLanguageOnlineHelpful?1.目前网络粗话非常盛行2.禁止网络粗话是否有用,人们观点不一
A.1 B.2 C.3 D.4
对于球后溃疡的临床表现,下列哪项不符合A.不易出血 B.症状较一般十二指肠溃疡
托管机构挪用托管客户金融债券,取得违法所得55万元,则中国人民银行应对其采取(
三、2016年1-7月,同城、异地、国际/港澳台快递业务量分别占全部快递业务量的
不属于行政立法原则的是( )。A.依法立法原则 B.信息公开立法原则 C.
根据耕地占用税法律制度的规定,下列情形中,不缴纳耕地占用税的是()。A.占用市区
关于隧道洞门工程施工的说法,错误的是()A.基础应设于稳固的地基上,并将杂
最新回复
(
0
)