diff --git a/app/helpers/exercises_helper.rb b/app/helpers/exercises_helper.rb
index a859a239e..323bad3cf 100644
--- a/app/helpers/exercises_helper.rb
+++ b/app/helpers/exercises_helper.rb
@@ -142,6 +142,9 @@ module ExercisesHelper
         right_users_count = 0
         #该问题的正确率
         if ex.question_type == Exercise::MULTIPLE  #多选题
+          if standard_answer.size == 1  #以前的多选题答案存在一个表里
+            standard_answer = standard_answer.first.to_s.split("").map(&:to_i)
+          end
           right_user_ids = user_ids
           standard_answer.each do |choice_position|
             standard_answer_choice_id = ex_choices.select{|ec| ec.choice_position == choice_position}.first&.id
@@ -160,12 +163,7 @@ module ExercisesHelper
 
         #每个选项的正确率
         ex_choices.each do |c|
-          Rails.logger.info("######________c__________#############{c}")
-          Rails.logger.info("######________standard_answer__________#############{standard_answer}")
-
           right_answer = standard_answer.include?(c.choice_position)   #选项的标准答案为选项的位置
-          Rails.logger.info("######_______right_answer__________#############{right_answer}")
-
           answer_users_count = effictive_users.select{|answer| answer.exercise_choice_id == c.id}.size
 
           answer_percent = (effictive_users_count == 0 ? 0.0 : (answer_users_count / effictive_users_count.to_f ).round(3))