diff --git a/app/helpers/exercises_helper.rb b/app/helpers/exercises_helper.rb
index f2208e751..ae15b0ba3 100644
--- a/app/helpers/exercises_helper.rb
+++ b/app/helpers/exercises_helper.rb
@@ -180,7 +180,7 @@ module ExercisesHelper
       elsif ex.question_type == Exercise::COMPLETION  #填空题
         ex_ordered = ex.is_ordered
         null_standard_answer = ex.exercise_standard_answers
-        null_stand_choice = null_standard_answer.pluck(:exercise_choice_id).uniq  #一个exercise_choice_id可能对应多个answer_text
+        null_stand_choice = null_standard_answer.pluck(:exercise_choice_id)  #一个exercise_choice_id可能对应多个answer_text
         null_stand_text = null_standard_answer.pluck(:answer_text).reject(&:blank?)
         standard_answer_count = 0
         each_null_score = null_stand_choice.size > 0 ? (ex&.question_score.to_f / null_stand_choice.uniq.size).round(3) : 0.0
@@ -191,7 +191,6 @@ module ExercisesHelper
             user_count = 0
             s_choice_text = null_stand_text[index]
             user_count = user_count + effictive_users.select{|answer| answer.exercise_choice_id == s && answer.answer_text == s_choice_text}.size
-
             answer_percent = ((effictive_users_count == 0) ? 0.0 : (user_count / effictive_users_count.to_f ).round(3))
             answer_option = {
               :choice_position => index+1,