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【简答题】
某 工程 现场浇筑混凝土梁,梁断面为400mm×400mm,钢筋间最小净距为40mm,要求混凝土设计强度等级为C20,工地现存下列材料,试选用合适的水泥及石子。 水泥: 32.5复合水泥;42.5复合水泥;52.5复合水泥。 石子: 5~10mm;5~20mm;5~30mm;5~40mm。
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A.
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B.
How will you get there?
C.
Will you go there with your parents?
D.
I'm sure you will enjoy yourself there.
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