为了搞好城市管理，我市在部分交叉路口相继安装了交通红绿灯和电

为了搞好城市管理，我市在部分交叉路口相继安装了交通红绿灯和电子警察监控系统。如图5所示为某一路口的红绿灯设施。已知三只灯泡均标有“220V 40W”字样，其中一只灯泡的电阻是 Ω，该设施正常工作一天(24h)将消耗 kW·h。

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1210 0.96

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为了搞好城市管理，我市在部分交叉路口相继安装了交通红绿灯和电

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