4.why don't you get an electric shock when you touch wire?
问题描述：
4.why don't you get an electric shock when you touch wire?
1.what type of substance is the best electrical conductor?
2.Electrical wires are usually made out of what substance?
3.What substance is a common insulator?
答
1.最好的导电物质是什么?
2.电线通常使用哪种物质制成的?
3.常用的绝缘物质是什么?
4.当你接触电线的时候,为什么没有被电到?为什么没有触电?