切线与直线垂直说明什么

页面:/news/view-3412665/ | 耗时:0.8899 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=3412665 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3412665 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3412665 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1153141,1115407,1014148,692351,545547,1165808,987578,1741543,775825,494513,1091351,1125935,829594,1066667,1034682,1184241,541452,878627,3259887,671715,852039,718792,428747,1434788,490959,1137231,784654,1144293,659823,560701) ORDER BY field (ArticleID,1153141,1115407,1014148,692351,545547,1165808,987578,1741543,775825,494513,1091351,1125935,829594,1066667,1034682,1184241,541452,878627,3259887,671715,852039,718792,428747,1434788,490959,1137231,784654,1144293,659823,560701)