“独立重复试验”(《中学数学试验教材》第二册 (下 ) p .15 1)既是前面所学“互斥事件”和“相互独立事件”的进一步延续 ,也是后面学习“二项分布”的基础 ,是中学数学概率部分的重要内容之一 .教学此部分时 ,深感教材对本部分的处理比较简略 ,学生在处理这类问题时生搬硬套 “Independent repeated experiments” (Secondary Mathematics Test Teaching Material, second volume (lower) p.15 1) is both a further continuation of the “mutually exclusive events” and “mutually independent events” that have been learned in the preceding, and is also a study of “binomial distributions” later. The basis of this is one of the important contents of the probability part of middle school mathematics. When teaching this part, it is deeply felt that the teaching materials deal with this part more simply, and that students should apply it in handling such problems.