【单选题】While admitting that this forecast was_____uncertain,the scientist warned people to make preparations against bad weathers.
【判断题】施工现场临时用电工程采用二级配电、三级漏电保护系统。
【判断题】施工现场临时用电工程采用三级配电、二级漏电保护系统。
【简答题】lack of peace (quiet: rest) n.
【单选题】While admitting that this forecast was()exaggerated, the scientists warned against treating it as a cry of wolf.
【单选题】建筑施工现场临时用电工程专用的电源中性点直接接地的220/380V一相四线制低压电力系统,必须采用三级配电系统、( )接零保护系统、二级漏电保护系统。