一、知识梳理《事件的可能性》一章的知识结构图:二、知识要点回顾1.在一定条件下必然会发生的事件叫做必然事件;在一定条件下必然不会发生的事件叫做不可能事件;在相同条件下,由于偶然因素的影响,在一定条件下可能发生,也可能不发生的事件叫做不确定事件或随机事件. First, the knowledge combing “Possibility of events” chapter of the knowledge structure: Second, the knowledge points Review 1. Under certain conditions, the inevitable event is called an inevitable event; under certain conditions inevitable event is not called Incident; under the same conditions, due to the impact of accidental factors, under certain conditions may or may not happen event is called an uncertain event or a random event.