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期中数学提分笔记,有理数+整式考点

  • 2026-11-09 02:13:11
期中数学提分笔记,有理数+整式考点

期中数学提分笔记，有理数+整式考点。七年级数学期中核心公式汇总，包含平方差5种经典变形，这是考试高频考点，考前多看多练。
#七年级数学 #期中复习 #初中数学 #数学笔记

小提示：平方差公式注意符号，多练变形题型，避免计算失误。

浙江,3小时前,
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【九年级】75.期中复习:找“隐藏”线段解决某些最值问题

基本 文件 流程 错误 SQL 调试
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  1. CONNECT:[ UseTime:0.000711s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.002125s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000475s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000424s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000760s ]
  6. SELECT * FROM `set` [ RunTime:0.000608s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000800s ]
  8. SELECT * FROM `article` WHERE `id` = 541878 LIMIT 1 [ RunTime:0.000364s ]
  9. UPDATE `article` SET `lasttime` = 1794162334 WHERE `id` = 541878 [ RunTime:0.000985s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000311s ]
  11. SELECT * FROM `article` WHERE `id` < 541878 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000462s ]
  12. SELECT * FROM `article` WHERE `id` > 541878 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000334s ]
  13. SELECT * FROM `article` WHERE `id` < 541878 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000580s ]
  14. SELECT * FROM `article` WHERE `id` < 541878 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000622s ]
  15. SELECT * FROM `article` WHERE `id` < 541878 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000819s ]
0.090460s