题目内容

Copernicus’s theory is now the basis ______ all our ideas of the universe are built.

A．to which

B．on which

C．for which

D．by which

解析

练习册系列答案

Nicolaus Copernicus’ discovery about the universe is , which later achievements in astronomy science.

A.
ambitious; gave birth to
B.
enthusiastic; resulted in
C.
obvious; resulted in
D.
revolutionary; led to

By careful observation and precise calculation, Nicolaus Copernicus _____ that there is no one center in the universe and the sun is the center of the solar system.

A.
believed
B.
thought
C.
concluded
D.
imagined

句子填空（共10小题；每小题1分，满分10分）

Dear Nicolaus Copernicus,

I am a s______ studying astronomy and I would very much like to read your new theory about the solar s_____

I hope you will p______it for several reasons.

I understand the problems with the present theory. The way the plants move is not what you would expect if the earth was the center of the u_______. It is also odd that the brightness of some s____seems to change. So I agree with you that we need a new theory.

I know your observations have been very carefully c_____out over many years. Now you must have the courage to publish them. S______ can never advance unless people have the courage of their beliefs. I know you worry about what will h_____ if you publish your new theory. No m_______ how people oppose it, time will show w_____your ideas are right or wrong.

So I hope you will feel you can publish your new theory.

Yours sincerely,

Li Hua

His friends were ___________and encouraged him to publish his ideas, but Copernicus was cautious.

A. technical B. official C. educated D. enthusiastic