Bycarefulobservationandprecise

更新 2022-09-03
科目英语
题型单选题
难度较易
浏览 566

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

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