请问铜和铝哪个磁导率大一些

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select * from tbl_Articles WHERE ArticleID=2735528 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2735528 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2735528 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(217133,3130897,1124041,1760704,1968451,1097771,1115563,1073116,1113075,1079277,1416151,1132771,2594085,2821636,3257106,1373022,1969875,1065713,1114632,1100601,1108141,1098325,3153460,2131061,2137186,540844,1131315,3365770,1128609,1123389) ORDER BY field (ArticleID,217133,3130897,1124041,1760704,1968451,1097771,1115563,1073116,1113075,1079277,1416151,1132771,2594085,2821636,3257106,1373022,1969875,1065713,1114632,1100601,1108141,1098325,3153460,2131061,2137186,540844,1131315,3365770,1128609,1123389)