为什么历史上�现电子后,没有规定电子流动的方�为电流的方�,而仍然用「正电荷」的概念来解释�? 知乎 Template




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tomski为什么历史上�现电子后,没有规定电子流动的方�为电流的方�,而仍然用「正电荷」的概念来解释�? 知乎 coloring