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初中物理新教材(八上)第一章《机械运动》& 第二章《声现象》教学参考

  • 2026-07-30 15:56:01
初中物理新教材(八上)第一章《机械运动》& 第二章《声现象》教学参考

初中物理（八上）第一章《机械运动》教学参考及习题参考答案与提示

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  1. CONNECT:[ UseTime:0.000574s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000785s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000307s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000241s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000473s ]
  6. SELECT * FROM `set` [ RunTime:0.000200s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000668s ]
  8. SELECT * FROM `article` WHERE `id` = 469838 LIMIT 1 [ RunTime:0.000644s ]
  9. UPDATE `article` SET `lasttime` = 1785400150 WHERE `id` = 469838 [ RunTime:0.004956s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000251s ]
  11. SELECT * FROM `article` WHERE `id` < 469838 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000498s ]
  12. SELECT * FROM `article` WHERE `id` > 469838 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002620s ]
  13. SELECT * FROM `article` WHERE `id` < 469838 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000999s ]
  14. SELECT * FROM `article` WHERE `id` < 469838 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000830s ]
  15. SELECT * FROM `article` WHERE `id` < 469838 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000885s ]
0.080820s