Whilehewasinvestigatingwaystoi

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更新 2022-09-03
科目英语
题型单选题
难度中等
浏览 1452

While he was investigating ways to improve the telescope, Newton made _______ discovery which completely changed _______ man’s understanding of colour.

A．a；/	B．a；the　
C．/；the	D．the；a

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