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【可编辑】初中化学教材习题ppt|第二单元空气和氧气|课后习题|练习与应用|复习与提高

  • 2026-09-22 05:18:21
【可编辑】初中化学教材习题ppt|第二单元空气和氧气|课后习题|练习与应用|复习与提高

【获取方式】关注后发送“第二单元教材习题”可免费领取，持续更新中

九年级化学新教材在课后习题方面有巨大改动，合理利用教材习题，可达到事半功倍的教学效果。

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初中语文教材“课文”内容“减少”了

基本 文件 流程 错误 SQL 调试
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  3. 缓存信息 : 0 reads,0 writes
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  1. CONNECT:[ UseTime:0.000492s ] mysql:host=172.18.0.4;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001022s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000471s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000372s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000551s ]
  6. SELECT * FROM `set` [ RunTime:0.000279s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000782s ]
  8. SELECT * FROM `article` WHERE `id` = 471155 LIMIT 1 [ RunTime:0.000369s ]
  9. UPDATE `article` SET `lasttime` = 1790153337 WHERE `id` = 471155 [ RunTime:0.001603s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000363s ]
  11. SELECT * FROM `article` WHERE `id` < 471155 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000446s ]
  12. SELECT * FROM `article` WHERE `id` > 471155 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000394s ]
  13. SELECT * FROM `article` WHERE `id` < 471155 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000548s ]
  14. SELECT * FROM `article` WHERE `id` < 471155 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000743s ]
  15. SELECT * FROM `article` WHERE `id` < 471155 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000729s ]
0.095241s