问题
填空题
长度()及以上的隧道,应设置施工照明电源插座和冷光源指示照明灯具(照度1.0Lx)。
答案
参考答案:3000m
长度()及以上的隧道,应设置施工照明电源插座和冷光源指示照明灯具(照度1.0Lx)。
参考答案:3000m
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their ____________. She goes to work by ____________. |