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高三一轮复习8:曲线运动

  • 2026-10-28 23:28:00
高三一轮复习8:曲线运动
启思：
  1.生活中曲线运动更常见，研究曲线的意义更大。我们处理曲线运动的方法还是比较简单的，遵从从简原则，化曲为直，正交分解。平面里的运动建立平面坐标系，分解为两个方向上的分运动研究；三维立体的运动需建立三维坐标，分解为一维分运动和二维平面内的运动研究。
  2.遇到具体问题，先要问清楚谁在运动，做何种运动，为何如此运动，然后再思考用何种思想方法解决，这是普适性思维，正如我们做事：先清楚做啥，为什么做，再考虑最优的方法---定也是简单的、熟悉的。
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预习+订正+复习|六年级上册数学课本答案+核心知识点

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  1. CONNECT:[ UseTime:0.000407s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000665s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000350s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000421s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000570s ]
  6. SELECT * FROM `set` [ RunTime:0.000277s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000599s ]
  8. SELECT * FROM `article` WHERE `id` = 527621 LIMIT 1 [ RunTime:0.000327s ]
  9. UPDATE `article` SET `lasttime` = 1793203422 WHERE `id` = 527621 [ RunTime:0.001088s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000301s ]
  11. SELECT * FROM `article` WHERE `id` < 527621 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000400s ]
  12. SELECT * FROM `article` WHERE `id` > 527621 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000364s ]
  13. SELECT * FROM `article` WHERE `id` < 527621 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000475s ]
  14. SELECT * FROM `article` WHERE `id` < 527621 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000600s ]
  15. SELECT * FROM `article` WHERE `id` < 527621 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000742s ]
0.085847s