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八上历史第1课鸦片战争(课件)

2026-08-09 07:40:51

八上历史第1课鸦片战争(课件)

同学们，刚刚视频里远古先民饱受严寒、野兽威胁，依靠采集、渔猎艰难求生，食物来源极不稳定，时常陷入温饱危机，而先民偶然发现落地的种子能够生根结果，由此开启了人工种植农作物的探索，原始农业应运而生，彻底改变了人类漂泊的生活，今天我们就一同学习第二课《原始农业与史前社会》。

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CONNECT:[ UseTime:0.000354s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000537s ]
SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004445s ]
SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000722s ]
SHOW FULL COLUMNS FROM `set` [ RunTime:0.000688s ]
SELECT * FROM `set` [ RunTime:0.000240s ]
SHOW FULL COLUMNS FROM `article` [ RunTime:0.000607s ]
SELECT * FROM `article` WHERE `id` = 523793 LIMIT 1 [ RunTime:0.000435s ]
UPDATE `article` SET `lasttime` = 1786349745 WHERE `id` = 523793 [ RunTime:0.002636s ]
SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000273s ]
SELECT * FROM `article` WHERE `id` < 523793 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000457s ]
SELECT * FROM `article` WHERE `id` > 523793 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000440s ]
SELECT * FROM `article` WHERE `id` < 523793 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000717s ]
SELECT * FROM `article` WHERE `id` < 523793 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000713s ]
SELECT * FROM `article` WHERE `id` < 523793 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003563s ]

0.116359s

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