为什么4g卡信号不好

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select * from tbl_Articles WHERE ArticleID=2941005 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2941005 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2941005 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(447913,1804710,1994278,310222,249257,1097635,1069395,1323836,624235,510690,339176,107257,183743,2220572,1092189,3187473,2616386,2231480,552925,620440,1116177,111479,365219,2077677,2411540,2615893,1715925,777594,2465441,566217) ORDER BY field (ArticleID,447913,1804710,1994278,310222,249257,1097635,1069395,1323836,624235,510690,339176,107257,183743,2220572,1092189,3187473,2616386,2231480,552925,620440,1116177,111479,365219,2077677,2411540,2615893,1715925,777594,2465441,566217)