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
30
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/3580828.html
相关试题推荐
【B1】[br]【B10】[originaltext]Nowwetraveltothenorthcentralpartofthe
【B1】[br]【B7】[originaltext]NowwetraveltothenorthcentralpartoftheU
【B1】[br]【B4】[originaltext]NowwetraveltothenorthcentralpartoftheU
【B1】[br]【B3】[originaltext]NowwetraveltothenorthcentralpartoftheU
[originaltext]WhenMidoriwastwoyearsold,sheoftenclimbedontothepian
[originaltext]WhenMidoriwastwoyearsold,sheoftenclimbedontothepian
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]M:MathsDepartment,DoctorWebsterspeaking.W:Hello,Prof.Web
随机试题
InequalityIsNotInevitable[A]Adangeroustrendhasde
Asitis,sleepissoundervaluedthatgettingbyonfewerhourshasbecome
?依照《药品注册管理办法》药物治疗作用确证阶段是A.Ⅰ期临床试验 B.Ⅱ期临
羊水栓塞的常见病因不包括A.子宫有开放的血管 B.子宫强直性收缩 C.前置胎
长期大量使用化学农药使得抗药害虫种类不断增加,且抗药性也越来越厉害。今天要杀死这
一天早上,陈一航蹦蹦跳跳地走进教室,在搬椅子时,他发现旁边小朋友的椅子上有一本书
关于反向大豆提油套利的做法正确的是( )。A.买入大豆期货合约,同时卖出豆油和豆
X线片上正常牙槽嵴高度为A.牙颈下O.5mm B.牙颈下1mm C.牙颈下2
D
(2014真题)关于价值工程中功能的价值系数的说法,正确的是()。A:价值系数越
最新回复
(
0
)