根据下面内容，回答题：

　　Copernicus was born in Torun, Poland, on February 19,1473. Little is known about his early lifeexcept that his father died when he was 10. An uncle adopted him, his two sisters, and his brother.The uncle saw to it that the two boys received a good education. Copernicus went to the University ofCracow. There he studied such subjects as Latin, mathematics, and astronomy. It was probably at thattime that he changed his Polish name, Niklas Kopperuigk, to the Latin form of Nicolaus Copernicus.In 1496 Copernicus went to Italy,where he spent the next 10 years studying at various universities.In Copernicus' time people still believed that all things--the sun, the stars, and the planetsmoved around the earth. It was an old belief that few men had ever questioned. Aristotle had basedhis theory of astronomy on this belief. Because the Church had long been the center of learning, thetheory was also linked to religious beliefs.

　　In 1506 Copernicus returned to his homeland. A few years later he began to work for the Church.All those years Copernicus carried on his work in astronomy. He had just the most basic equipmentand, like other scientists of his day, made observations with only his eyes. Still, using mathematics andlogic ,Copernicus worked out a different theory,which held that the planets went around the sun.

　　Copernicus did not announce his ideas. He did not want to make trouble. But he could not hidethe scientific truth. So he talked about his theory with his friends, who strongly advised him to have his work published. His great book, On the Revolutions of the Heavenly Bodies, appeared at the veryend of his life. Copernicus saw the first copy on the day he died, May 24,1543.

　　44From the passage we can see that astronomy is __________ .

　　A.the life experience of great menB.the movement of the stars and the planets ,C.the scientific study of natural objects in spaceD.the theories developed by scientists of old times

　　参考答案：C

　　参考解析：

　　从哥白尼学的是天文学(astron.omy)，研究的是太空中的太阳、地球等可知，astronomy就是对太空中天体的研究。

　　45Copernicus developed his theory __________ .

　　A.using various telescopesB.based on Aristotle's beliefsC.through observations and reasoningD.under the encouragement of his friends

　　参考答案：C

　　参考解析：

　　根据文章中第三段最后两句可知，哥白尼是通过眼睛观察以及数学和逻辑的方法来进行研究的。

　　46The writer of the passage wants us to know that__________ .

　　A.Copernicus did not tell about his discovery until the day of his deathB.for many years Copernicus dared to do nothing openly against the ChurchC.pushed by his friends Copernicus decided to write a book in May 1543D.shortly before he got back to Poland Copernicus started to work for the Church

　　参考答案：B

　　参考解析：

　　根据文中第四段第一句可知，哥白尼起初没有将他的发现公布于世。

　　47Copernicus had his great book published because __________ .

　　A.he didn't agree with AristotleB.he could not hide the scientific truthC.he worked for the ChurchD.his friends advised him to do so

　　参考答案：D

　　参考解析：

　　文章第四段第四句表明，哥白尼在朋友的建议下出了书。

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