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建筑施工員考試試題 一、單項選擇題: ( 每題 1 分,共 20 分) 1、常溫下水泥砂漿必須在拌后( B)內(nèi)使用完畢。 A、 2h B、3h C、4h D 、 12h 2、大體積砼澆筑時,宜采用(
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