第二单元

Unit 2

Touch the ball -- possibility

二 摸球游戏——可能性

A: Six red balls

甲：六个红球

B: Three red balls and three yellow balls

乙：三个红球和三个黄球

C: Four red balls and one yellow ball

丙：四个红球和一个黄球

What questions can you ask?

你能提出什么问题?

Cooperative exploration

合作探索

1. Touch any ball from the bag A. What will happen?

1. 从甲袋里任意摸一个球，结果会怎样？

2. Touch any ball from bag B, what will happen?

2. 从乙袋里任意摸一个球，结果会怎样？

There are four red balls and one yellow ball in the third bag. Touch one of them at will. What will happen?

3. 丙袋里有四个红球和一个黄球，任意摸一个，结果会怎样？

Some events occur with certainty and others with uncertainty. Uncertainty about the likelihood of an event occurring.

有些事件的发生是确定的，有些则是不确定的。不确定事件发生的可能性有大有小。