diff --git a/app/controllers/users/videos_controller.rb b/app/controllers/users/videos_controller.rb
index 03acd76cc..e4dffec23 100644
--- a/app/controllers/users/videos_controller.rb
+++ b/app/controllers/users/videos_controller.rb
@@ -40,6 +40,8 @@ class Users::VideosController < Users::BaseController
   def batch_publish
     Videos::BatchPublishService.call(observed_user, batch_publish_params)
     render_ok
+  rescue Videos::BatchPublishService::Error => ex
+    render_error(ex.message)
   end
 
   private
diff --git a/app/models/course_group.rb b/app/models/course_group.rb
index 33e40ee52..d57edf497 100644
--- a/app/models/course_group.rb
+++ b/app/models/course_group.rb
@@ -8,7 +8,7 @@ class CourseGroup < ApplicationRecord
   has_many :homework_group_reviews, :dependent => :destroy
   scope :by_group_ids, lambda { |ids| where(id: ids)}
 
-  validates :name, length: { maximum: 20 }
+  validates :name, length: { maximum: 60 }
 
   after_create :generate_invite_code
 
diff --git a/app/services/videos/batch_publish_service.rb b/app/services/videos/batch_publish_service.rb
index 3ff16dc57..e435b9508 100644
--- a/app/services/videos/batch_publish_service.rb
+++ b/app/services/videos/batch_publish_service.rb
@@ -1,4 +1,6 @@
 class Videos::BatchPublishService < ApplicationService
+  Error = Class.new(StandardError)
+
   attr_reader :user, :params
 
   def initialize(user, params)
@@ -16,6 +18,8 @@ class Videos::BatchPublishService < ApplicationService
         video = user.videos.find_by(uuid: param[:video_id])
         next if video.blank? || video.processing_video_apply.present?
 
+        raise Error, '视频还未上传完成' if video.vod_uploading?
+
         video.title = param[:title].to_s.strip.presence || video.title
         video.apply_publish
         video.save!
diff --git a/app/views/exercise_questions/_exercise_questions.json.jbuilder b/app/views/exercise_questions/_exercise_questions.json.jbuilder
index 51c30ad92..bbdf45440 100644
--- a/app/views/exercise_questions/_exercise_questions.json.jbuilder
+++ b/app/views/exercise_questions/_exercise_questions.json.jbuilder
@@ -17,7 +17,8 @@ if question.question_type <= 2  #当为选择题或判断题时，只显示选
   end
   json.question_choices do
     json.array! exercise_choices.each_with_index.to_a do |a,index|
-      standard_answer_b = standard_answers_array.include?(a.choice_position)
+      #TODO: 旧版本来一个题只有一个标准答案的，新版又做成了一个题有多个标准答案（exercise_choice_id存放的是标准答案的位置..）
+      standard_answer_b = standard_answers_array.join("").include?(a.choice_position.to_s)
       user_answer_b = user_answer.include?(a.id)
       json.c_position (index+1) if ex_choice_random_boolean  #当选项随机时，选项位置以此为准，否则不出现
       json.choice_id a.id