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
2023-08-25
37
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.
16. What does the speaker say about most astronomers today?
17. What did most European scholars believe about the size of the universe before 17th century?
18. What did some scientists try to explain by suggesting that stars repel each other?
选项
A、It is static.
B、It is in motion.
C、It can’t be measured.
D、It’s getting bigger.
答案
A
解析
短文提到,直到17世纪前,天文学家仍认为宇宙大小是恒定不变的。A中的static“静止的”对应文中的unchanged,故为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2955671.html
相关试题推荐
[originaltext]W:Idon’twantmysonTimtohangoutwithBob,whodrinksando
[originaltext]W:Idon’twantmysonTimtohangoutwithBob,whodrinksando
[originaltext]W:Idon’twantmysonTimtohangoutwithBob,whodrinksando
[originaltext]Traditionally,itwastheparentsofthebridewhoworriedab
[originaltext]Anystudentofbodylanguageknowsthatthereisoneuniversa
[originaltext]ThelandmarkclocktowercontainingElizabethToweratBritai
[originaltext]ThelandmarkclocktowercontainingElizabethToweratBritai
[originaltext]ThelandmarkclocktowercontainingElizabethToweratBritai
[originaltext]W:Oh,hello,John.Areyouusingyourdictatingmachinethismor
[originaltext]W:Oh,hello,John.Areyouusingyourdictatingmachinethismor
随机试题
Directions:Forthispart.youareallowed30minutestowriteashortessayent
Inlinguistics,thestudyofmeaningiscalled______.A、phonologyB、morphologyC、
DrivingalongSouthStreet,wheretheLosAngelessprawlmeetssprawlingOra
Idecidednotto________Johnwhenhewasinsuchadesperateposition.A、vanishB
下列不能表述卤化氢性质的选项是A.易溶于水 B.具有刺激性气味 C.在室温下
( )是正式批准一个项目的文档,或者是批准现行项目是否进入下一阶段的文档。A.
股指期货当存在期价低估时,交易者可反向套利。()
下列关于资产计税基础的表述中错误的有()。A.资产的计税基础代表的是资产在未来期
必须参加施工现场起重机械设备验收的单位有()。A、建设单位B、监理单位C、总
不属于人工定额中必需消耗的工作时间的是()。A、休息时间 B、停工时间 C
最新回复
(
0
)