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單項(xiàng)選擇題
A.10.5m B.10m C.11m
A.≤300mm B.≥300mm C.＝300mmm
A.0.85t/m3 B.0.75t/m3 C.0.95t/m3
A.原煤 B.褐煤 C.貧煤
A.1450t B.1500t C.1550t
A.1200t B.1250t C.1300t
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