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初中物理新教材发光二极管的符号变了

  • 2026-09-25 22:12:45

初中物理新教材发光二极管的符号变了

这些常用的电路元器件及其对应符号一定要记住并画得标准才行。


每天几分钟，享受自己进步的过程。

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辽宁,30分钟前,
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新版四年级语文教材同步生字+卷面双效字帖

基本 文件 流程 错误 SQL 调试
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  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=4cfbc47f22b7a7f8a962280cf3012485
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  1. CONNECT:[ UseTime:0.000513s ] mysql:host=172.18.0.4;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000835s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000350s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000358s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000517s ]
  6. SELECT * FROM `set` [ RunTime:0.000266s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000706s ]
  8. SELECT * FROM `article` WHERE `id` = 473065 LIMIT 1 [ RunTime:0.000332s ]
  9. UPDATE `article` SET `lasttime` = 1790371387 WHERE `id` = 473065 [ RunTime:0.001116s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000302s ]
  11. SELECT * FROM `article` WHERE `id` < 473065 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000394s ]
  12. SELECT * FROM `article` WHERE `id` > 473065 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000344s ]
  13. SELECT * FROM `article` WHERE `id` < 473065 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000506s ]
  14. SELECT * FROM `article` WHERE `id` < 473065 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000633s ]
  15. SELECT * FROM `article` WHERE `id` < 473065 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000530s ]
0.079838s