单选题:按照规定,矿山工程中工作和备用水管的总能力应在20h内排出矿井(  )涌水量。

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题目内容:
按照规定,矿山工程中工作和备用水管的总能力应在20h内排出矿井(  )涌水量。 A.24h的正常
B.24h的最大
C.36h的正常
D.36h的最大

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