题目内容

设x表示一个沿数轴做随机运动的质点位置，A ={x＞20}，B ={x≤22}，则A、B是否互斥

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设x表示一个沿数轴做随机运动的质点位置，A ={x＞22}，B ={x＜19}，A、B事件的关系

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