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【单选题】
设A,B 为两个随机事件,且B发生导致A发生 ,则下列式子正确的是A.
P（B的对立事件-A的对立事件)= P（B的对立事件)-P(A的对立事件)
B.
P((AB)的对立事件)=1- P(A）
C.
D.
P(A∣B的对立事件）= P(A)
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