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学习笔记—氦气

  • 2026-04-24 09:40:50
学习笔记—氦气
学习笔记📒—氦气

氦气具有低密度、低沸点和惰性等特质,是航空航天、半导体、光纤和低温超导等领域不可或缺的关键气体,战略地位极高...[氦气也被称为“气体稀土”和被誉为“黄金气体”，半导体、航天军工、超导、医疗核磁共振领域完全不可替代，国内 90% 以上或依赖进口]...①中东冲突导致卡塔尔（全球 35% 产能）氦气设施受损停产+俄罗斯同步实施氦气出口管制，全球供应缺口扩大，导致价格或持续暴涨...②需求端的半导体芯片、航空航天、医疗科研等领域无法替代，国产替代或为刚性刚需，紧迫性或已提升...

好好学习，顺势跟随~
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  1. CONNECT:[ UseTime:0.000822s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000933s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000338s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000303s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000522s ]
  6. SELECT * FROM `set` [ RunTime:0.000210s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000645s ]
  8. SELECT * FROM `article` WHERE `id` = 483390 LIMIT 1 [ RunTime:0.000408s ]
  9. UPDATE `article` SET `lasttime` = 1776996695 WHERE `id` = 483390 [ RunTime:0.007397s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000248s ]
  11. SELECT * FROM `article` WHERE `id` < 483390 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000411s ]
  12. SELECT * FROM `article` WHERE `id` > 483390 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000456s ]
  13. SELECT * FROM `article` WHERE `id` < 483390 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000563s ]
  14. SELECT * FROM `article` WHERE `id` < 483390 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002272s ]
  15. SELECT * FROM `article` WHERE `id` < 483390 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007588s ]
0.160323s