当前位置：首页>课件>小米课件·2026年修订版/第三轮修订版|第22课 机遇与挑战:不断发展的现代社会[九下·世界现代史]

小米课件·2026年修订版/第三轮修订版|第22课 机遇与挑战:不断发展的现代社会[九下·世界现代史]

  • 2026-04-18 12:46:54
小米课件·2026年修订版/第三轮修订版|第22课 机遇与挑战:不断发展的现代社会[九下·世界现代史]

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第六单元 走向和平发展的世界 

第22课  不断发展的现代社会  

    我们先来看第一个变化计算机互联网。提到这个大家立马要想到它开始于什么时候？第三次科技革命。课本上说第二次世界大战后，随着电子计算机的发明和普及，数据库和计算机网络建立起来，我们要知道指的就是第三次科技革命，1946年2月14日世界上第一台电子计算机在美国宾夕法尼亚大学诞生。特别大的设备，然后不断的升级，到台式电脑，还不是我办公室那种台式电脑，是后面带个大屁股，有同学可能见过老式那种电视机带个大屁股那种。最后从台式发展到了笔记本电脑，可以便携。随着计算机的更新换代，到20世纪90年代，互联网在全球迅速普及，成为现代社会重要的基础设施，标志着人类开始进入信息时代。

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  1. CONNECT:[ UseTime:0.000416s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000677s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004512s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002476s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000566s ]
  6. SELECT * FROM `set` [ RunTime:0.000204s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000522s ]
  8. SELECT * FROM `article` WHERE `id` = 484633 LIMIT 1 [ RunTime:0.003234s ]
  9. UPDATE `article` SET `lasttime` = 1776744014 WHERE `id` = 484633 [ RunTime:0.003885s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.002350s ]
  11. SELECT * FROM `article` WHERE `id` < 484633 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002349s ]
  12. SELECT * FROM `article` WHERE `id` > 484633 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004439s ]
  13. SELECT * FROM `article` WHERE `id` < 484633 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001936s ]
  14. SELECT * FROM `article` WHERE `id` < 484633 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001740s ]
  15. SELECT * FROM `article` WHERE `id` < 484633 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001793s ]
0.105308s