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第 18 届全国大学生数学竞赛初赛试卷中的一道好题

  • 2026-11-15 03:32:36
第 18 届全国大学生数学竞赛初赛试卷中的一道好题
试题点评：该题综合考查了常微分方程（ODE）、函数的性质（有界性）、极限的判定与求解，以及广义积分（反常积分）等核心知识点。题目设计层层递进，将微分方程与函数分析紧密结合，体现了极佳的交叉融合，是一道极具区分度和综合性的优秀竞赛题。
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高一上英语期中试卷详细分析(难点、考点、易错点)总结!

基本 文件 流程 错误 SQL 调试
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  1. CONNECT:[ UseTime:0.000743s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000954s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000479s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000392s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000554s ]
  6. SELECT * FROM `set` [ RunTime:0.000264s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000666s ]
  8. SELECT * FROM `article` WHERE `id` = 548312 LIMIT 1 [ RunTime:0.000365s ]
  9. UPDATE `article` SET `lasttime` = 1794705079 WHERE `id` = 548312 [ RunTime:0.001341s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000300s ]
  11. SELECT * FROM `article` WHERE `id` < 548312 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000465s ]
  12. SELECT * FROM `article` WHERE `id` > 548312 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000390s ]
  13. SELECT * FROM `article` WHERE `id` < 548312 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000590s ]
  14. SELECT * FROM `article` WHERE `id` < 548312 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000511s ]
  15. SELECT * FROM `article` WHERE `id` < 548312 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000631s ]
0.095348s