设随机事件A, B, C相互独立，且P(A) = P(B) = P(C) = 0.5，则P(AC|A∪B) =（   ）.
A. B. C. D.

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单项选择题A、正确 B、错误

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单项选择题根据原砂的基本组成，铸造用砂可分为石英砂和非石英砂两类。（ ）