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深圳市2025年初中学业水平考试化学实验操作模拟考试视频指导

  • 2026-06-06 13:05:55
深圳市2025年初中学业水平考试化学实验操作模拟考试视频指导

深圳市2025年初中学业水平考试

化学实验操作模拟考试

演示视频

A

二氧化碳的实验室制取与性质

以下视频来源于
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B

过滤粗盐水

C

碱的化学性质

以下视频来源于
唐云波教科研专家工作室
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  1. CONNECT:[ UseTime:0.001033s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001493s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002690s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004008s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001396s ]
  6. SELECT * FROM `set` [ RunTime:0.000681s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001565s ]
  8. SELECT * FROM `article` WHERE `id` = 581292 LIMIT 1 [ RunTime:0.007677s ]
  9. UPDATE `article` SET `lasttime` = 1782452468 WHERE `id` = 581292 [ RunTime:0.019154s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000708s ]
  11. SELECT * FROM `article` WHERE `id` < 581292 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001095s ]
  12. SELECT * FROM `article` WHERE `id` > 581292 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000943s ]
  13. SELECT * FROM `article` WHERE `id` < 581292 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006958s ]
  14. SELECT * FROM `article` WHERE `id` < 581292 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.008156s ]
  15. SELECT * FROM `article` WHERE `id` < 581292 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006557s ]
0.217275s