首页
登录
职称英语
According to the professor, what were, the beliefs of the Greek philosophers bas
According to the professor, what were, the beliefs of the Greek philosophers bas
游客
2024-10-26
1
管理
问题
According to the professor, what were, the beliefs of the Greek philosophers based upon? [br]
In ancient times, many people believed the earth was a flat disc. Well over 2,000 years ago, the ancient Greek philosophers were able to put forward two good arguments proving that it was not. Direct observation 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 that this could be true only if the earth was spherical. 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, or Polaris, 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 the fast telescope was invented.
选项
A、A place for making astronomical observations.
B、An instrument used for observing stars.
C、A unit of measurement.
D、The North Star.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3817793.html
相关试题推荐
Asoneoftheyoungestprofessorsintheuniversity,Longfellowiscertainlyon
Accordingtotheprofessor,whatwere,thebeliefsoftheGreekphilosophersbas
AccordingtoMr.Annan,whatmaybeasourceofproblemsfacingtheworld?[br]
AccordingtoMr.Annan,whatmaybeasourceofproblemsfacingtheworld?[orig
Thedistinguishedprofessorwasinvitedtopreside______theconferenceonbeha
Accordingtothenews,thetwoLibyansare_______.[br][originaltext]TwoLi
Accordingtothenews,whatareDefenseDepartmentofficialsexpectedtodoonF
Accordingtothenews,whatareDefenseDepartmentofficialsexpectedtodoonF
Accordingtothenews,whetherthebirdfluwillcauseagreatcasualtydepends
WhichoneofthefollowingisNOTtrueaccordingtotheaccident?[br][origina
随机试题
Cultureinfluencesanindividual’shealthbeliefs,behaviours,activitiesan
Thisisasetofrecommendationsfor______.[br]Wecanlearnfromthepassage
Whathavepeoplediscoveredabouthobbies?Hobbiescanbeprofitableand______.
A—CashbusinessJ—modeofpaymentB—CommissionreceivablesK—dow
某公路桥梁工程施工项目,业主通过公开招标分别与某路桥公司和某监理单位签订了施工合
如果把一个小功率二极管直接同一个电源电压为1.5V、内阻为零的电池实行正向连接,
Thenew【garment】fitsherperfectly.A.h
依巴斯汀是由特非那定分子和哪个化合物经结构改造而来A.咪唑斯汀B.富马酸酮替芬C
港口与航道工程图纸的熟悉与审查应由()来负责组织。A.项目总工程师 B.项目
手部创口清创处理,一般不迟于( )。A.8小时 B.9小时 C.10小时
最新回复
(
0
)