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
4
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
[originaltext][22/23]ASouthAfricanbusinessmanisrefusingtoleaveCroat
A.75% B.37℃ C.25℃ D.21℃ E.95%饮片库房室温应
某患者,上颌牙列完整,缺失,Ⅲ度松动,牙槽骨吸收近根尖,Ⅱ度松动,龈缘红肿,临床
霍乱重症首日补液量应该达到( )。A.1000~2000ml B.2000~
由县级以上人民政府报经上一级政府决定可以在传染病流行时采取的紧急措施是()
发行公司债券的相关承销资料的保管时间不得少于( )。A.债券到期之日或本息全部
下列有关公开发行公司证券的条件,正确的是()。 ①具备健全且运行良好的组织机
下列哪组药物相互作用是错误的A:硝酸甘油和普萘洛尔合用,对心绞痛治疗有协同作用
端子箱及检修电源箱精益化评价细则要求端子箱内部元器件红外测温记录(每年至少1次)
施工现场必须有针对性地悬挂醒目的安全警示牌的部位有()。A.主要施工部位 B.
最新回复
(
0
)