【单选题】【消耗次数：1】
根据《建设工程施工现场管理规定》，该工程现场围挡设置高度不宜低于（ ）。
①
3m
②
2.5m
③
1.8m
④
2m
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施工现场周边要设置围挡。其中市区主要路段的工地设置封闭围挡或围挡高度不小于2.5m，一般路段的工地设置封闭围挡或围挡高度不小于1.8m。围挡应达到坚固、稳定、整洁、美观。
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高大模板支撑系统是指建设工程施工现场混凝土构件模板支撑高度超过8m，或搭设跨度超过18m，或施工总荷载大于15kN/㎡，或集中线荷载大于20kN/m的模板支撑系统。（）
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