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二年级科学

科学

二年级科学 - 电路

五年级科学

科学

串联电路（以研究灯泡的数量与灯泡亮度之间的关系）

科学

科学

下图显示两组学生所装置的串联电路和并联电路。根据实验，写出两组电路的观察结果，然后完成句子。

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