fix bug

app/controllers/exercises_controller.rb

@@ -1334,7 +1334,7 @@ class ExercisesController < ApplicationController
 
   #导出空白试卷
   def export_exercise
-    @exercise_questions = @exercise.exercise_questions.order("question_number ASC")
+    @exercise_questions = @exercise.exercise_questions.includes(:exercise_choices).order("question_number ASC")
     filename = "#{current_user.real_name}_#{@course.name}_#{@exercise.exercise_name}_#{Time.current.strftime('%Y%m%d%H%M%S')}.pdf"
     stylesheets = "#{Rails.root}/app/templates/exercise_export/exercise_export.css"
     render pdf: 'exercise_export/blank_exercise', filename: filename, stylesheets: stylesheets

app/templates/exercise_export/exercise_export.css

@@ -156,7 +156,7 @@ p{
     position: absolute;
     display: inline-block;
     bottom: 6px;
-    /*left: 1px;*/
+    left: 1px;
 }
 
 .line-line {