学生报告试卷分析修复

sexam/src/main/resources/mapper/report/ERstudentMapper.xml

         mq.complexity mcomplexity,cq.classavgscore,cq.gradeavgscore
         from e_paper_student_question sq left join t_question q on sq.questionid=q.questionid
         left join t_question mq on q.questionpid=mq.questionid
-        left join e_rclass_question cq on (sq.questionid=cq.questionid or mq.questionid=cq.questionid)
+        left join e_rclass_question cq on sq.epid=cq.epid and sq.classid=cq.classid and (sq.questionid=cq.questionid or mq.questionid=cq.questionid)
         left join e_paper_qtype_question pq on sq.eptqid=pq.eptqid
         where sq.epid=#{epid} and sq.studentid=#{studentid} GROUP BY sq.epsqid order by sq.qorder,q.sorder
     </select>