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夜雨聆风 > > 办公文件 > 数学题型汇总170——全面分析之不等式与不等式组(五)

数学题型汇总170——全面分析之不等式与不等式组(五)

当前时间： 2026-08-20 15:54:08 分类：办公文件 评论(0)
数学题型汇总170——全面分析之不等式与不等式组(五)

典型题9：难度★★★

【答案解析】
【典型例题10】
【答案解析】
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  1. CONNECT:[ UseTime:0.000784s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001569s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000319s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000251s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000523s ]
  6. SELECT * FROM `set` [ RunTime:0.000195s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000626s ]
  8. SELECT * FROM `article` WHERE `id` = 952398 LIMIT 1 [ RunTime:0.004321s ]
  9. UPDATE `article` SET `lasttime` = 1787212448 WHERE `id` = 952398 [ RunTime:0.011267s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000287s ]
  11. SELECT * FROM `article` WHERE `id` < 952398 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000485s ]
  12. SELECT * FROM `article` WHERE `id` > 952398 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000666s ]
  13. SELECT * FROM `article` WHERE `id` < 952398 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002576s ]
  14. SELECT * FROM `article` WHERE `id` < 952398 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001901s ]
  15. SELECT * FROM `article` WHERE `id` < 952398 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005277s ]
0.192849s