如图所示的电路闭合开关s1和s2后下列分析正确的是 A.小灯泡亮电铃响 b.小灯泡亮电铃不响 C.小灯泡不亮电铃响 D.小灯泡不亮 Template




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tomski如图所示的电路闭合开关s1和s2后下列分析正确的是 a.小灯泡亮电铃响 b.小灯泡亮电铃不响 coloring