A.60 B.100 C.50 D.20
A.2000mm B.2500mm C.3000mm D.3500mm
A.50 B.25 C.40 D.80
A.条痕为黑色 B.条痕黄褐色 C.条痕为红色
A.精矿 B.重油 C.白灰 D.煤、富矿
A.58.3% B.59.3% C.58.7%
A.50 B.80 C.30 D.55
A.石灰石 B.生石灰 C.消化灰
A.91.67 B.90.67 C.92.67
