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第十单元重难点视频讲解--常见的酸(PPT可下载)

  • 2026-11-10 02:35:23
第十单元重难点视频讲解--常见的酸(PPT可下载)

从厨房的醋到实验室的硫酸，酸在生活与化学学习中扮演着重要角色。

本视频将带你系统梳理常见酸的性质、用途及核心化学反应，重点攻克酸的通性（与指示剂、活泼金属、金属氧化物、碱、盐的反应规律）、浓硫酸的特性及稀释操作等重难点。

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通过网盘分享的文件：第十单元课题1、2.pptx

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  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=699ac3cafed98112b9b22d19d1f53aaf
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  1. CONNECT:[ UseTime:0.000841s ] mysql:host=172.18.0.4;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000984s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000393s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000361s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000526s ]
  6. SELECT * FROM `set` [ RunTime:0.000323s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000678s ]
  8. SELECT * FROM `article` WHERE `id` = 490630 LIMIT 1 [ RunTime:0.000360s ]
  9. UPDATE `article` SET `lasttime` = 1794363821 WHERE `id` = 490630 [ RunTime:0.001507s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000304s ]
  11. SELECT * FROM `article` WHERE `id` < 490630 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000448s ]
  12. SELECT * FROM `article` WHERE `id` > 490630 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000365s ]
  13. SELECT * FROM `article` WHERE `id` < 490630 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000460s ]
  14. SELECT * FROM `article` WHERE `id` < 490630 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000624s ]
  15. SELECT * FROM `article` WHERE `id` < 490630 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000537s ]
0.100522s