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html课件 | 圆的面积推导

  • 2026-05-11 04:32:54
html课件 | 圆的面积推导

课件《圆的面积推导》能将圆切割成4-128份，通过不同份数的切割、拼接，能让学生充分体验圆转化为平行四边形的过程。

课件演示视频

课件下载地址：

链接: https://pan.baidu.com/s/1MvAoNb4i5zm3-ImutdSZRg 提取码: p2x3

课件链接地址：https://musk-online.fbcontent.cn/pub-musk-ai-studio/workflow/file/document/6iqMBaVgVfYYp2f7vveu4G.html

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  1. CONNECT:[ UseTime:0.001016s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001491s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.012790s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000829s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001545s ]
  6. SELECT * FROM `set` [ RunTime:0.000547s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001805s ]
  8. SELECT * FROM `article` WHERE `id` = 497933 LIMIT 1 [ RunTime:0.001436s ]
  9. UPDATE `article` SET `lasttime` = 1778755939 WHERE `id` = 497933 [ RunTime:0.023943s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.001044s ]
  11. SELECT * FROM `article` WHERE `id` < 497933 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001596s ]
  12. SELECT * FROM `article` WHERE `id` > 497933 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.005275s ]
  13. SELECT * FROM `article` WHERE `id` < 497933 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001856s ]
  14. SELECT * FROM `article` WHERE `id` < 497933 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002706s ]
  15. SELECT * FROM `article` WHERE `id` < 497933 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004912s ]
0.235210s