三个灯泡----比较亮度灯泡亮度三个灯泡上分别标着L1“220V、100W”,L2“220V、100W”,L3“220V、25W”,则 A K1、K2都闭合时,L1最亮,L3最暗.B K1、K2都闭合时,L1不亮,L3比L2亮C K2断开,K1闭合时,L2不亮,L1比L3
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![三个灯泡----比较亮度灯泡亮度三个灯泡上分别标着L1“220V、100W”,L2“220V、100W”,L3“220V、25W”,则 A K1、K2都闭合时,L1最亮,L3最暗.B K1、K2都闭合时,L1不亮,L3比L2亮C K2断开,K1闭合时,L2不亮,L1比L3](/uploads/image/z/8683452-36-2.jpg?t=%E4%B8%89%E4%B8%AA%E7%81%AF%E6%B3%A1----%E6%AF%94%E8%BE%83%E4%BA%AE%E5%BA%A6%E7%81%AF%E6%B3%A1%E4%BA%AE%E5%BA%A6%E4%B8%89%E4%B8%AA%E7%81%AF%E6%B3%A1%E4%B8%8A%E5%88%86%E5%88%AB%E6%A0%87%E7%9D%80L1%E2%80%9C220V%E3%80%81100W%E2%80%9D%2CL2%E2%80%9C220V%E3%80%81100W%E2%80%9D%2CL3%E2%80%9C220V%E3%80%8125W%E2%80%9D%2C%E5%88%99+A+K1%E3%80%81K2%E9%83%BD%E9%97%AD%E5%90%88%E6%97%B6%2CL1%E6%9C%80%E4%BA%AE%2CL3%E6%9C%80%E6%9A%97.B+K1%E3%80%81K2%E9%83%BD%E9%97%AD%E5%90%88%E6%97%B6%2CL1%E4%B8%8D%E4%BA%AE%2CL3%E6%AF%94L2%E4%BA%AEC+K2%E6%96%AD%E5%BC%80%2CK1%E9%97%AD%E5%90%88%E6%97%B6%2CL2%E4%B8%8D%E4%BA%AE%2CL1%E6%AF%94L3)
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