球团用铁精矿粉的质量要求是（)。A.适宜的水份B.适宜的水份和粒度C.较细的粒度D.适宜的水分、粒度

A.磁铁矿

B.赤铁矿

C.褐铁矿

D.菱铁矿

A.≥0.3%

B.＜0.3%

C.＞0.25%

D.≤0.25%

A.≥50%

B.＜50%

C.≥19%

D.＜19%

A.60%

B.50%

C.80%

D.90%

A.≥85%

B.＜85%

C.≥70%

D.＜70%