
灯泡发亮了吗?
Presentation
•
Science
•
2nd Grade
•
Hard
CY Tiong
Used 1+ times
FREE Resource
8 Slides • 0 Questions
1
灯泡发亮了吗?
什么物体可代替开关的功能?
2
物体可分为
1.电导体 :可让电流通过
2.电的绝缘体 : 不能可让电流通过
3
电导体的例子
硬币
4
电导体的例子
铁钉
5
电导体的例子
6
电的绝缘题
橡皮
7
电的绝缘体
纸袋
8
电的绝缘体
塑料杯
灯泡发亮了吗?
什么物体可代替开关的功能?
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