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【实验指导】新版教科版小学科学四年级下册2.2点亮小灯泡
1.由电池、电线、灯泡等组成的电流通路叫电路。
2.电从电池的正极流出来，通过导线从灯泡的一个连接点进入，经过灯丝，再从灯泡的另一个连接点流出，回到这个电池的负极，形成一条完整的电路，_???????°±???????????????è·??????????é????????????°±???????????????????°±???????????????_
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