gis中三维模型的设计，武汉大学朱庆教授的论文，适合研究GIS三维建模的人。-gis 3D model of the design, Wuhan University Professor Zhu Qing paper suitable for three-dimensional GIS modeling study of people.
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SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.074636s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001013s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003104s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001020s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001351s ]
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