insert into ex_paper_question(paper_id,question_id,score) values
(#{item.paperId},#{item.questionId},#{item.score})
delete from ex_paper_question where paper_id=#{paperId}
delete a from ex_paper_question as a
inner join ex_question as b on b.id=a.question_id
and a.paper_id=#{paperId}
and b.question_type=#{questionType}