MySQL Query Error select id,title,subtitle,class from dx_kskm_news where class='参考书' and kskm in ('101思想政治理论','204英语二','302数学二','896大气科学综合知识','844气象学与气候学','842气象学与气候学','201英语一','615高等数学（理）','839天气学原理','801大气科学专业综合','315化学（农）','807气象学与气候学','314数学（农）','810气象学与气候学','807大气科学概论','816数据结构与算法设计','852气象综合','815大气科学基础','815大气物理','601数学（理）','832气象综合知识','601高等数学','801天气学','808天气学','623动力气象学','826天气学原理与方法') order by kskm desc limit -150,50 Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in D:\wwwroot\dddjyky\wwwroot\lanmu.php on line 331
