丝绸之路上的科学技术-畅读网

　　　　

丝绸之路上的科学技术

作者：王阳

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mobi/epub/pdf/awz3

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科学技术 >> 科普读物

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内容简介:

本书分别从数学、天文学、医学、物理学、建筑学、机械等方面，选择历丝绸之路和地区的一些能够展现科学技术与人类文明进步的有趣案例和突出亮点，基于世界的观点，透过中外的比较，展示了古代科学技术随着时代、文化、地域环境的转变而发生的变化和差异，凸显了丝绸之路的历史意义和永恒价值。

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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 46 LIMIT 1 [ RunTime:0.000764s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.000951s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.001105s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1772397722 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:0.583621s ]

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