白炽灯泡在工作时灯丝的伏安特性是怎样的？ 知乎 Sketch Coloring Page

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tomski白炽灯泡在工作时灯丝的伏安特性是怎样的？ 知乎 coloring

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有些白炽灯泡亮度与其灯丝有关．为了研究不同家用白炽灯泡在正常工作时的亮度与灯丝的关系小伟同学通过实验得到甲乙丙三个灯泡正常工作时的亮度是 sketch template

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