请问一克等于多少毫克

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select * from tbl_Articles WHERE ArticleID=2439412 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2439412 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2439412 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2358204,2556387,1127441,505023,1132681,1321363,1053696,234961,1278527,3359931,1128675,308945,2201098,623158,2192756,3070282,1063229,1133339,1114866,3327592,332663,1999236,386964,1298135,1304130,1395051,2907358,1313878,1125101,1085888) ORDER BY field (ArticleID,2358204,2556387,1127441,505023,1132681,1321363,1053696,234961,1278527,3359931,1128675,308945,2201098,623158,2192756,3070282,1063229,1133339,1114866,3327592,332663,1999236,386964,1298135,1304130,1395051,2907358,1313878,1125101,1085888)