[img]file:///C:\Documents and Settings\Administrator\Application Data\Tencent\Users\122490340\QQ\WinTemp\RichOle\5]78[MD((EBVCTFF2X~2532.jpg[/img][img]file:///C:\Documents and Settings\Administrator\Application Data\Tencent\Users\122490340\QQ\WinTemp\RichOle\5]78[MD((EBVCTFF2X~2532.jpg[/img]两电阻都是100欧姆 电压根本不是那么一回事