While he was investigating ways to improve the telescope Newton made _______discovery which complete_刷题宝

题干

While he was investigating ways to improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color.

A：a ,/

B：a ,the

C：/, the

D：the ,a

上一题下一题 0.0难度选择题更新时间:2017-07-08 01:36:59

答案(点此获取答案解析）

A

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