试卷的截止且公开显示标准答案

app/views/exercises/start_answer.json.jbuilder

@@ -31,6 +31,11 @@ else
   json.question_status @question_status
 end
 
+exercise_type = 3
+if @t_user_exercise_status == 3 && @exercise.answer_open
+  exercise_type = 4
+end
+
 json.partial! "exercises/exercise_scores"
 
 json.exercise_questions do
@@ -57,7 +62,7 @@ json.exercise_questions do
                   shixun_challenges: question.exercise_shixun_challenges,
                   user_answer: question_info[:answered_content],
                   choices:question.exercise_choices,
-                  exercise_type:3,
+                  exercise_type:exercise_type,
                   shixun_type:question_info[:shixun_type],
                   ques_position: q[:ques_number],
                   edit_type:nil