单项选择题
A.焦煤 B.肥煤 C.长焰煤 D.弱粘煤
A.JM B.FM C.SM D.PSM
A.27.21-30.90 B.24.31-27.20 C.21.31-24.30 D.16.71-21.30
A.0.31-0.75% B.≤0.30% C.1.26-1.75 D.1.76-2.50
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