毛家村水库工程采用的泥浆掺氢氧化钠指标为（）。

A.中细砂层
B.坍墙掉块
C.一般砂砾地层
D.漏水地层

A.< 30ml∕30min 和< 4mm
B.20~30ml∕30min 和2~4mm
C.< 20ml∕30min 和< 2mm
D.< 20ml∕30min 和< 3mm

A.1.15~1.20
B.1.20~1.25
C.1.25~1.30
D.0~1.15