多项选择题

What are the two stylistic features of travel guides?( ) A. being informative B. being concise C. being vocative D. being practical

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问答题

设ABC是三个事件,如果满足两两独立的条件()并且同时满足P(ABC)=P(A)P(B)P(C)那么A、B、C相互独立

答案: 正确答案:P(AB)=P(A)P(B)|P(BC)=P(B)P(C)|P(CA)=P(C)P(A)
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