1尝试这是一堂有关排列组合两个原理的习题课,大致的教学过程是这样的.师:今天我们做三个游戏.(学生显得有些兴奋)请看大屏幕的显示.(游戏一:有甲、乙、丙、丁四个透明的大玻璃缸,每个玻璃缸里装有10个球,它们的编号分别为:1,2,…,10,现在同学们分成四组并推出代表,上场后从对应的玻璃 1 Try This is an exercise on the two principles of arranging and combining exercises, the general teaching process is like this: Teacher: Today we do three games (students seem a little excited) Please see the big screen display. A, B, C, D four transparent large glass tanks, each equipped with 10 balls glass, their numbers were: 1,2, ..., 10, and now the students are divided into four groups and introduced on behalf of, After playing from the corresponding glass