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
27
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
Alastingmarriagedoesnotalwayssignalahappymarriage.Plentyof【C1】___
[originaltext]W:U.S.ConsulateinMarseilles,canIhelpyou?M:Yes,please.
AnannualreportputoutbytwopublichealthgroupsshowsthatAmericaisg
材料的年度计划是企业控制成本,编制资金计划和考核物资部门全年工作的主要依据。(
对贯人度测量精度要求较高时,宜采用()A.在受检桩附近架设基准梁,安置百分
纳西族传统节日为()。A.火把节 B.三朵节 C.泼水节 D.芦笙节
阴道后穹窿穿刺若抽出鲜血,放置4~5分钟发生血凝,说明A.抽出了血管内血液 B
脂肪酸合成的中间产物 A.丙酰CoA.丙酮 B.丙酮酸 C.丙二酰 Do
(2017年真题)下列主体中,应当向持票人承担票据责任的有()A.空头支票出票人
女,43岁,右下腹持续性疼痛5天,伴恶心、呕吐,呕出物为胃内容物。体温38.5℃
最新回复
(
0
)