如何用万用表判断稳压器好坏

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select * from tbl_Articles WHERE ArticleID=1994932 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1994932 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1994932 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(637334,1066324,1083339,658735,2480471,291129,2210571,305711,2262760,1099779,1071759,495428,2032102,1077156,1081255,1043285,243493,2371703,1090571,678169,149586,140567,364131,735266,1082001,2481870,1087599,2617572,2533875,192565) ORDER BY field (ArticleID,637334,1066324,1083339,658735,2480471,291129,2210571,305711,2262760,1099779,1071759,495428,2032102,1077156,1081255,1043285,243493,2371703,1090571,678169,149586,140567,364131,735266,1082001,2481870,1087599,2617572,2533875,192565)