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高三情境化微专题复习微课(五)——废金属回收之金属书签的制作

  • 2026-11-01 15:41:42
高三情境化微专题复习微课(五)——废金属回收之金属书签的制作

    本课通过制作金属书签，经历废金属预处理、书签刻蚀、废液处理等探究过程，并结合近三年高考真题统计数据，引导学生分析铁及其化合物的考查重点：基础性质与应用、Fe²⁺与Fe³⁺的检验与转化、工业流程中的铁相关反应等。强调铁元素与生产生活的紧密联系，以及高考对“真实情境+知识应用”的考查趋势，激发学生学习动力。

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  1. CONNECT:[ UseTime:0.000717s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001028s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000473s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000359s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000556s ]
  6. SELECT * FROM `set` [ RunTime:0.000297s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000646s ]
  8. SELECT * FROM `article` WHERE `id` = 533300 LIMIT 1 [ RunTime:0.000333s ]
  9. UPDATE `article` SET `lasttime` = 1793545294 WHERE `id` = 533300 [ RunTime:0.001370s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000324s ]
  11. SELECT * FROM `article` WHERE `id` < 533300 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000417s ]
  12. SELECT * FROM `article` WHERE `id` > 533300 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000367s ]
  13. SELECT * FROM `article` WHERE `id` < 533300 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000469s ]
  14. SELECT * FROM `article` WHERE `id` < 533300 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000583s ]
  15. SELECT * FROM `article` WHERE `id` < 533300 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000523s ]
0.086160s