如何自制图片电路元件呢？方法很简单，在一张硬纸片上，画出各电学元件的实物图，然后用剪刀剪下各图形，即成为图片电路元件，导线则用红毛线在两端系上圆形针，使用时别在图片上即可（注：在“家庭电路”的教学中，则用红毛线表示火线，蓝毛线表示零线）．教师用挂图，则可 How to make picture circuit components? The method is very simple. On a piece of hard paper, draw the physical map of each electrical component. Then use scissors to cut out each figure, which becomes a picture circuit component. The wire is tied with a red yarn at both ends. Don’t be on the picture (note: In the “family circuit” teaching, the line of fire is represented by red wool, and the blue line represents the zero line). If teachers use wall charts, they can