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Notice: Undefined index: HTTPS in /www/wwwroot/mengmianren.com/wp-content/plugins/dessky-cache/dessky-cache.php on line 43 线性规划问题有可行解,则()A必有基可行解;B必有唯一最优解;C无基可行解;D无唯一最优解 – 萌面人博客