科学百科-畅读网

　　　　

科学百科

作者：王小彬

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mobi/epub/pdf/awz3

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科学技术 >> 自然科学

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内容简介:

全书内容按学科种类共分基础科学、地理、天文、生物、动物、植物、医学、交通通信、军事科学及应用科学与当代新科技10部分。各个部分除分别介绍该学科有趣的基础知识外，还介绍了各个领域的最新发展和前沿知识。在编写过程中，既注重用准确且通俗易懂的文字科学地揭示其内涵，又注重用生动有趣的相关知识链接拓展其外延。这样做有助于开阔广大青少年的阅读视野，使之全面、科学地理解科学知识。书中将近200个知识点化成一篇篇短小有趣、浅显易懂的知识小品，为广大青少年朋友们学习科学知识提供了一条捷径。

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SHOW FULL COLUMNS FROM `ls_nav` [ RunTime:0.001687s ]
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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 5 LIMIT 1 [ RunTime:0.000973s ]
SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 48 LIMIT 1 [ RunTime:0.001010s ]
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:0.001429s ]
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:0.001245s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1746481392 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:0.547034s ]

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