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Physics, 22.07.2021 06:20 lilpetals

một thanh kim loại chưa bị nhiễm điện được cọ xát và sau đó trở thành vật mang điện tích dương đó là do thanh kim loại đã

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một thanh kim loại chưa bị nhiễm điện được cọ xát và sau đó trở thành vật mang điện tích dương đó là...
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