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
2023-08-28
49
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、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/2964564.html
相关试题推荐
[originaltext]Ifyouarelikemostpeople,yourintelligencevariesfromse
[originaltext]Ifyouarelikemostpeople,yourintelligencevariesfromse
[originaltext]Robertrecentlyattendedalectureonsafetyataneighborhoo
[originaltext]Robertrecentlyattendedalectureonsafetyataneighborhoo
[originaltext]Afewmonthsago,millionsofpeopleinLondonheardalarmsa
[originaltext]Afewmonthsago,millionsofpeopleinLondonheardalarmsa
[originaltext]M:Hello,Nancy.Iknowyouareoneofthewomentaxidriversin
[originaltext]M:Hello,Nancy.Iknowyouareoneofthewomentaxidriversin
[originaltext]M:Hello,Nancy.Iknowyouareoneofthewomentaxidriversin
[originaltext]M:Well,Amina,thanksforlettingmehaveyourdraftinsuchgoo
随机试题
[originaltext]PeopleshouldexpecttoseethenumberofTalibanandAlQaeda
OliviaPedersenthoughttheNissanLeafparkedoutsideherfavoritelunchsp
测定重度胰外分泌功能失常采用A.胰泌素试验 B.NBT-PABA试验 C.缩
邓小平指出:“没有民主就没有社会主义,就没有社会主义的现代化。”这个论断指出了(
学生说你,上课方式呆板,怎么办?
下边四个图形中,只有一个是由上边的四个图形拼合(只能通过上、下、左、右平移)而成
重症哮喘发作时可见A.纵隔气肿 B.ECG见肺型P波 C.意识障碍 D.
选择地铁基坑围护结构形式,应根据()等,经技术经济综合比较后确定。A.基坑深度
心源性水肿的特点是A:从身体下垂部位开始 B:从身体疏松部位开始,如眼睑 C
甲建筑公司承建乙市一住宅项目,采用租赁方式向乙市建筑机械租赁公司租赁一物料提升机
最新回复
(
0
)