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[单选题]
国标规定,以理论分选密度(δ)扣除沉矸(或低密度物)作为100%计算,δ±0.1含量为()%时,该原煤的可选性为极难选。
A.≤10.0
B.20.1~30.0
C.10.1~20.0
D.>40.0
查看答案
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A.≤10.0
B.20.1~30.0
C.10.1~20.0
D.>40.0
A.10.1~20.0
B.20.1~30.0
C.30.1~40.0
D.≤10.0
A.30.1~40.0
B.10.1~20.0
C.≤10.0
D.20.1~30.0
A.30.1~40.0
B.20.1~30.0
C.≤10.0
D.10.1~20.0
A.≤10.0
B.20.1~30.0
C.10.1~20.0
D.30.1~40.0
A.20.7%
B.13.5%
C.12.4%
D.21.2%
A.中等可选
B.难选
C.极易选
D.易选
A.中等可选
B.易选
C.难选
D.极易选