趣谈数字-畅读网

　　　　

趣谈数字

作者：纸上魔方

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mobi/epub/pdf/awz3

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内容简介:

这是一套有趣的数学科普丛书，涉及美食、人体、医学、建筑、物理、军事、交通、古代数学等与数学相关的领域，内容包罗万象，故事生动有趣，是培养孩子数学兴趣和数学思维的绝佳读物。本套丛书运用生动活泼的文字、幽默诙谐的漫画以及贴近生活的例子，将复杂深奥的数学知识化繁为简，让孩子一看就明白，一学就会用！奇数和偶数谁更大？虚数真的很虚吗？原始人是怎么数数的？曝光率极高的数字“12”？八卦阵的数学原理？ …… 让我们一起去揭开数字的神秘面纱吧！

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SHOW FULL COLUMNS FROM `ls_nav` [ RunTime:0.001842s ]
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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 9 LIMIT 1 [ RunTime:0.008050s ]
SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 70 LIMIT 1 [ RunTime:0.007115s ]
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:0.006139s ]
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:0.006831s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1756291265 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:1.025212s ]

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