皮皮学，免费搜题
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搜题
【单选题】
某工程二层现浇钢筋混凝土楼板，拟分成三段按等节奏流水施工。每模板4天，绑扎钢筋水泥2天，浇筑混凝土1天，则该层楼板结构施工工期是（）天。A.
8
B.
11
C.
15
D.
21
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