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    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.


    1. A.
      believed
    2. B.
      thought
    3. C.
      concluded
    4. D.
      imagined
    C
    解析：
    试题
    分析：考查单词意思，believed意思“相信”， thought意思“认为”， concluded意思“得出结论”， imagined意思“想象”，句子意思“通过小心的观察和精确的计算，尼古拉.哥白尼得出结论：没有一个宇宙中心和太阳是太阳系的中心”，所以选C考点：考查单词意思
    点评：注意句子Nicolaus Copernicus concluded that there is no one center in the universe and the sun is the center of the solar system.是个关系代词that引导的宾语从句。注意there be句型，表示某个地方有什么。
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