10. (4分)While he was investigating ways t improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color. A. a ,/ B. a ,the C. /, the D. the ,a

10.
(4分)While he was investigating ways t improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color.

A. a ,/
B. a ,the
C. /, the
D. the ,a

出自：兰州大学大学英语（3）

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