多线程到底是不是同时执行

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select * from tbl_Articles WHERE ArticleID=2781856 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2781856 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2781856 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1067803,1085955,1093112,1073041,1113626,1061566,1060875,1066612,1076105,1049836,1070038,1073322,1078424,3235657,1080913,1064553,1065533,1072923,997640,1074276,1082333,1062618,1057607,1078521,1056832,1070848,1084703,1089526,1131035,1047767) ORDER BY field (ArticleID,1067803,1085955,1093112,1073041,1113626,1061566,1060875,1066612,1076105,1049836,1070038,1073322,1078424,3235657,1080913,1064553,1065533,1072923,997640,1074276,1082333,1062618,1057607,1078521,1056832,1070848,1084703,1089526,1131035,1047767)