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[单选题]
根据《电力工程钻探技术规程》(DL/T5096-2016)9.4.3条规定,在采取水试样之前将孔内原有水抽干净,或抽出相当于孔中水柱()倍以上的水。
A.1.0
B.1.5
C.2.0
D.3.0
查看答案
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A.1.0
B.1.5
C.2.0
D.3.0
A.当地水利
B.当地环保
C.当地政府
D.当地港监
A.1h
B.2h
C.3h
D.4h
A.200
B.300
C.150
D.100
A.30cm
B.50cm
C.70cm
D.100cm
A.1.5,200
B.1.7,200
C.1.7,150
D.1.5,150