Answers

2016-06-25T10:33:43+08:00
In terms of their economic contribution to the country, the important metallic minerals include goldcopperironchromitenickelmanganesecobalt, lead, zinc, molybdenum, mercury, and aluminum; while coal, phosphate rock, magnetite, sulfur, guano, baritebentonite, clay, diatomite, feldspar, gypsum, perlite,
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