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人教版化学制取氧气操作与氧气的检验AI课件

  • 2026-10-29 03:49:24

人教版化学制取氧气操作与氧气的检验AI课件

人教版九年级化学，第二单元《空气和氧气》课题3《制取氧气》第2课时——《制取氧气的操作与氧气的检验》。资料包含：
✅ PPT课件
✅ 配套教学设计
✅ 完整课堂逐字稿
适合公开课、优质课、校内展示课使用，也可以结合本班学情调整后用于日常授课。#人教版化学#九年级化学#制取氧气的操作与氧气的检验#化学公开课 #AI赋能课堂 #优质课件

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  1. CONNECT:[ UseTime:0.000421s ] mysql:host=172.18.0.4;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000612s ]
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  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000744s ]
  8. SELECT * FROM `article` WHERE `id` = 534856 LIMIT 1 [ RunTime:0.000453s ]
  9. UPDATE `article` SET `lasttime` = 1793977188 WHERE `id` = 534856 [ RunTime:0.000975s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000315s ]
  11. SELECT * FROM `article` WHERE `id` < 534856 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000567s ]
  12. SELECT * FROM `article` WHERE `id` > 534856 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000495s ]
  13. SELECT * FROM `article` WHERE `id` < 534856 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000644s ]
  14. SELECT * FROM `article` WHERE `id` < 534856 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000644s ]
  15. SELECT * FROM `article` WHERE `id` < 534856 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000740s ]
0.094924s