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二极管如何判断正负极_家居日记
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二极管如何判断正负极

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二极管如何判断正负极 1、看颜色，有白线的那一端是负极。2、看长短，引脚长的那一端为正极，则另一头为负极。3、看大小，内部金属片较小的为正极，金属片较大的为负极


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