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复习课件 | 铜眼看世界——金属铜的性质

  • 2026-09-29 04:04:13
复习课件 | 铜眼看世界——金属铜的性质
前 言

以青铜器的制造为主要切入口,以大单元教学理念为指导,通过情境创设、动手实验、学生总结等教学环节,在引导学生通过化学实验总结金属铜的性质的同时,进一步加深对化学研究内容及化学学习方法的理解,从而培养学生的化学学科核心素养。

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2026年复习课件 | “碱” 除烦恼——炉具清洁剂的奥秘（酸碱盐专题复习）

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  1. CONNECT:[ UseTime:0.000989s ] mysql:host=172.18.0.4;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001237s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000480s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000403s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000593s ]
  6. SELECT * FROM `set` [ RunTime:0.000319s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000790s ]
  8. SELECT * FROM `article` WHERE `id` = 506921 LIMIT 1 [ RunTime:0.000414s ]
  9. UPDATE `article` SET `lasttime` = 1790798438 WHERE `id` = 506921 [ RunTime:0.001576s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000389s ]
  11. SELECT * FROM `article` WHERE `id` < 506921 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000521s ]
  12. SELECT * FROM `article` WHERE `id` > 506921 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000412s ]
  13. SELECT * FROM `article` WHERE `id` < 506921 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000674s ]
  14. SELECT * FROM `article` WHERE `id` < 506921 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000993s ]
  15. SELECT * FROM `article` WHERE `id` < 506921 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001146s ]
0.086357s