红色的USB插头有什么用

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Post time 2021-3-16 19:26:49 | Show the author posts only Reply Awards

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[img]C:\Users\neema\Documents\Tencent Files\339298648\FileRecv\MobileFile\1615893190686.jpg[img]
示波器的USB线有两个插头，一个红色的，一个黑色的。只插黑色的示波器就能工作，那可不可以不插红色的。红色的到底有什么用？

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