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概率论专题(5)第二次小测复习上

  • 2026-11-11 04:34:34
概率论专题(5)第二次小测复习上
本讲与接下来一讲主要针对第二次概率论小测的教材内容进行详细展开，这一章的内容就是抓住分布和密度两个关键词，我们就是要研究各种分布和密度函数，无论是离散型，连续型，是均匀型或者是正态型，是二项分布，几何分布，帕斯卡分布或是泊松分布，总之识别结构，掌握通法是最重要的，最后预祝大家概率论考试都能取得满意的成绩。
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26年秋!二上语文期中复习押题考点提纲(背诵版+空白练习版),考前重点逐个回顾!

基本 文件 流程 错误 SQL 调试
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  1. CONNECT:[ UseTime:0.000593s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000848s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000470s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000354s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000557s ]
  6. SELECT * FROM `set` [ RunTime:0.000330s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000835s ]
  8. SELECT * FROM `article` WHERE `id` = 543123 LIMIT 1 [ RunTime:0.000409s ]
  9. UPDATE `article` SET `lasttime` = 1794351172 WHERE `id` = 543123 [ RunTime:0.001220s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000314s ]
  11. SELECT * FROM `article` WHERE `id` < 543123 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000445s ]
  12. SELECT * FROM `article` WHERE `id` > 543123 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000376s ]
  13. SELECT * FROM `article` WHERE `id` < 543123 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000816s ]
  14. SELECT * FROM `article` WHERE `id` < 543123 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000834s ]
  15. SELECT * FROM `article` WHERE `id` < 543123 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000971s ]
0.092734s