首页
登录
职称英语
[originaltext] In ancient times, many people believed the earth was a flat d
[originaltext] In ancient times, many people believed the earth was a flat d
游客
2023-08-16
33
管理
问题
In ancient times, many people believed the earth was a flat disc. Well over 2000 years ago, the ancient Greek philosophers were able to put forward two good arguments proving that it was not. Direct observations of heavenly bodies was the basis of both these arguments. First, the Greeks knew that during eclipses of the moon, the earth was between the sun and the moon, and they saw that during these eclipses, the earth’s shadow on the moon was always round. They realized this could be true only if the earth wasround. If the earth were a flat disc, then its shadow during eclipses would not be a perfect circle, it would be stretched out into a long ellipse. The second argument was based on what the Greeks saw during their travels. They noticed that the North Star appeared lower in the sky when they traveled south, in more northerly regions, the North Star appeared to them to be much higher in the sky. By the way, it was also from this difference in the apparent position of the North Star that the Greeks first calculated the approximate distance around the circumference of the earth, a figure recorded in ancient documents says 400,000 stadia, that’s the plural of the word stadium. Today, it’s not known exactly what length one stadium represents, but let’s say it was about 200 meters, the length of many athletic stadiums. This would make the Greek’s estimate about twice the figure accepted today, a very good estimate for those writing so long before even me first telescope was invented. Now listen to the following recording and answer questions 19 to 21.
19. What is the talk mainly about?
20. According to the professor, what were the beliefs of the Greek philosophers based upon?
21. What does me professor say about ancient Greeks who traveled south?
选项
A、They noticed an apparent change in the position of the North Star.
B、They observed eclipses at different times of the year.
C、They were the first to estimate the distance between heavenly bodies.
D、They wanted to prove that the Earth was flat.
答案
A
解析
细节题。根据The second argument was based on what the Greeks saw during their travels.They noticed that the North Star appeared lower in the sky when they traveled south可知,正确答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/2930970.html
相关试题推荐
Peoplecannowavoidhavingtosortthroughalbumsfromseveraldifferentfr
Peoplecannowavoidhavingtosortthroughalbumsfromseveraldifferentfr
Peoplecannowavoidhavingtosortthroughalbumsfromseveraldifferentfr
Peoplecannowavoidhavingtosortthroughalbumsfromseveraldifferentfr
Peoplecannowavoidhavingtosortthroughalbumsfromseveraldifferentfr
Peoplecannowavoidhavingtosortthroughalbumsfromseveraldifferentfr
[originaltext]Let’sbegintodaybydiscussingenzymes.Enzymesarewhatma
[originaltext]Let’sbegintodaybydiscussingenzymes.Enzymesarewhatma
[originaltext]Inthe18thcenturyFrencheconomistsprotestedtheexcessive
[originaltext]Inthe18thcenturyFrencheconomistsprotestedtheexcessive
随机试题
Lazinessisasin,everyoneknowsthat.Wehaveprobablyallhadlecturespo
NarratorListentoaconversationbetweentwostudentsafterascience
In1977,thegroupWomenOfficeWorkersheldacontestforsecretaries,invi
序列16,14,10,8,7,9,3,2,4,1的说法下面哪一个正确()
根据文意,下列依次填入文中括号内的句子最恰当的排序是()。①××市人民政府授权市
社会环境中各子系统对人类行为相互影响、相互交织。这体现的社会环境的主要特点是(
当事人一方不履行合同义务或者履行合同义务不符合约定的,在合同对违约责任没有具体约
根据《立法法》的规定,下列属于行政法规可以规定的事项有:()A.有关国务院
假设某工程项目组织内人员不能兼职,管理层次为3层,管理跨度为5个,该组织的人数是
2015年5月23曰8时30分,A特钢厂电炉车间电炉班在更换1号电炉炉体后,班长
最新回复
(
0
)