怎么看摩擦力的方向？

页面:/news/view-993130/ | 耗时:0.0887 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=993130 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=993130 LIMIT 0,1
select * from tbl_Articles_sphinx where id=993130 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(554223,728811,994435,1507484,1093222,1156964,922388,1304861,3108368,3239024,1079575,1101618,660295,1195479,1108614,3426816,1133174,1304635,786920,451582,2284406,568095,1122328,786888,1013061,1118889,1880098,1092081,1115209,543960) ORDER BY field (ArticleID,554223,728811,994435,1507484,1093222,1156964,922388,1304861,3108368,3239024,1079575,1101618,660295,1195479,1108614,3426816,1133174,1304635,786920,451582,2284406,568095,1122328,786888,1013061,1118889,1880098,1092081,1115209,543960)