铜的密度是多少

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select * from tbl_Articles WHERE ArticleID=860391 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=860391 LIMIT 0,1
select * from tbl_Articles_sphinx where id=860391 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1098875,463861,1120348,1116579,382512,543344,494038,1087723,1114676,512476,509042,1112742,492332,690370,386668,1134323,547451,550215,492707,1093961,86683,1116187,702436,1275211,550795,2964226,370901,1083604,1089652,1091920) ORDER BY field (ArticleID,1098875,463861,1120348,1116579,382512,543344,494038,1087723,1114676,512476,509042,1112742,492332,690370,386668,1134323,547451,550215,492707,1093961,86683,1116187,702436,1275211,550795,2964226,370901,1083604,1089652,1091920)