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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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While he was investigating ways to improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color.
a ,/     B. a ,the     C. /, the    D. the ,a

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Whilehewasinvestigatingwaystoi