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
15
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
AccordingtoProf.Snow,whichofthefollowingstatementsisINCORRECT?[br][
Onedayapoliceofficermanagedtogetsomefreshmushrooms.Hewassoplea
如果()处于熄灭状态,表示多线控制盘功能处于正常状态。A.“允许”指示灯 B
2015年上半年A区完成规模以上工业总产值289.9亿元,同比下降
在单位工程中,应按()划分为若干分部工程。A.结构部位 B.施工任务 C.施
下列关于数据分组的说法,正确的有()。A.数据分组的组数一般与数据本身的特点及
预计某公司今年末每股收益为2元,每股股息支付率为90%,并且该公司以后每年每股股
药物调剂、煎煮的特殊要求应注明在A.不需要注明B.药名之前C.处方左上角D.药品
在产品生命周期的成长阶段和成熟阶段,物流的重点是()A.高水准的物流活动和灵活
根据《安全生产法》,生产经营单位的安全生产管理人员应履行的职责有()。A、组织
最新回复
(
0
)