diff --git a/app/controllers/admins/examination_authentications_controller.rb b/app/controllers/admins/examination_authentications_controller.rb
index 8045644e1..c68c062b6 100644
--- a/app/controllers/admins/examination_authentications_controller.rb
+++ b/app/controllers/admins/examination_authentications_controller.rb
@@ -12,7 +12,7 @@ class Admins::ExaminationAuthenticationsController < Admins::BaseController
     ActiveRecord::Base.transaction do
       exam = ExaminationBank.find current_apply.container_id
       current_apply.update!(status: 1)
-      exam.update!(public: 0)
+      exam.update!(public: 1)
     end
     render_success_js
   end
diff --git a/app/controllers/admins/item_authentications_controller.rb b/app/controllers/admins/item_authentications_controller.rb
index 88d833ee9..8da9b232f 100644
--- a/app/controllers/admins/item_authentications_controller.rb
+++ b/app/controllers/admins/item_authentications_controller.rb
@@ -16,7 +16,7 @@ class Admins::ItemAuthenticationsController < Admins::BaseController
     ActiveRecord::Base.transaction do
       item = ItemBank.find current_apply.container_id
       current_apply.update!(status: 1)
-      item.update!(public: 0)
+      item.update!(public: 1)
     end
     render_success_js
   end
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index b418d528a..f68784db8 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -85,8 +85,8 @@ class ApplicationController < ActionController::Base
 
 	# 题库的访问权限
 	def bank_visit_auth
-		tip_exception(-2,"未通过职业认证") if current_user.is_teacher? && !current_user.certification_teacher? && !current_user.admin? && @bank.user_id != current_user.id && @bank.is_public
-		tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin? ||
+		tip_exception(-2,"未通过职业认证") if current_user.is_teacher? && !current_user.certification_teacher? && !current_user.admin_or_business? && @bank.user_id != current_user.id && @bank.is_public
+		tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin_or_business? ||
 			(current_user.certification_teacher? && @bank.is_public)
 	end
 
@@ -165,7 +165,7 @@ class ApplicationController < ActionController::Base
 	def find_course
 		return normal_status(2, '缺少course_id参数！') if params[:course_id].blank?
 		@course = Course.find(params[:course_id])
-		tip_exception(404, "") if @course.is_delete == 1 && !current_user.admin?
+		tip_exception(404, "") if @course.is_delete == 1 && !current_user.admin_or_business?
 	rescue Exception => e
 		tip_exception(e.message)
 	end
diff --git a/app/controllers/commons_controller.rb b/app/controllers/commons_controller.rb
index bcb0fa45a..16e9dc2be 100644
--- a/app/controllers/commons_controller.rb
+++ b/app/controllers/commons_controller.rb
@@ -58,7 +58,7 @@ class CommonsController < ApplicationController
           200
         end
       else
-        current_user.admin? ? 200 : 403
+        current_user.admin_or_business? ? 200 : 403
       end
     return normal_status(code, "你没有权限操作！") if code == 403
   end
diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 599a4440c..da9f8240a 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -396,7 +396,7 @@ class CoursesController < ApplicationController
   def teachers
     @search_str = params[:search].present? ? params[:search].strip : ""
 
-    if @course.try(:id) != 1309 || current_user.admin? || current_user.try(:id) == 15582
+    if @course.try(:id) != 1309 || current_user.admin_or_business? || current_user.try(:id) == 15582
       @teacher_list = @course.course_members.joins(:user).where("course_members.role in (1, 2, 3)
                                                      and LOWER(concat(users.lastname, users.firstname)) LIKE ?", "%#{@search_str}%")
     else
@@ -441,7 +441,7 @@ class CoursesController < ApplicationController
     @applications = CourseMessage.unhandled_join_course_requests_by_course(@course).
         joins("join users on course_messages.course_message_id=users.id").
         where("LOWER(concat(users.lastname, users.firstname)) LIKE ?", "%#{search_str}%")
-    if @course.try(:id) != 1309 || current_user.admin? || current_user.try(:id) == 15582
+    if @course.try(:id) != 1309 || current_user.admin_or_business? || current_user.try(:id) == 15582
       teacher_list = @course.course_members.where("course_members.role in (1, 2, 3)")
     else
       teacher_list = @course.course_members.where("(course_members.role in (1, 3) or (course_members.user_id = #{current_user.id}
@@ -838,7 +838,7 @@ class CoursesController < ApplicationController
 
   # 已通过职业认证的教师复制课堂
   def duplicate_course
-    return tip_exception("没有复制权限") unless current_user.admin? || current_user.is_teacher? || current_user.teacher_of_course?(@course)
+    return tip_exception("没有复制权限") unless current_user.admin_or_business? || current_user.is_teacher? || current_user.teacher_of_course?(@course)
     return tip_exception("教师职业认证未通过") unless current_user.pro_certification?
 
     new_course = @course.self_duplicate
@@ -1280,7 +1280,7 @@ class CoursesController < ApplicationController
     end
 
     if @all_members.size == 0
-      normal_status(-1,"课堂暂时没有学生")
+      normal_status(-1,"暂无学生数据")
     elsif params[:export].present? && params[:export]
       normal_status(0,"正在下载中")
     else
@@ -1308,7 +1308,7 @@ class CoursesController < ApplicationController
         end
 
         if @all_members.length == 0
-          normal_status(-1,"课堂暂时没有学生")
+          normal_status(-1,"暂无学生数据")
         elsif params[:export].present? && params[:export]
           normal_status(0,"正在下载中")
         else
@@ -1404,7 +1404,7 @@ class CoursesController < ApplicationController
   # Use callbacks to share common setup or constraints between actions.
   def set_course
     @course = Course.find_by!(id: params[:id])
-    tip_exception(404, "") if @course.is_delete == 1 && !current_user.admin?
+    tip_exception(404, "") if @course.is_delete == 1 && !current_user.admin_or_business?
   end
 
   # Never trust parameters from the scary internet, only allow the white list through.
diff --git a/app/controllers/examination_banks_controller.rb b/app/controllers/examination_banks_controller.rb
index ef545e06e..7c1f950f3 100644
--- a/app/controllers/examination_banks_controller.rb
+++ b/app/controllers/examination_banks_controller.rb
@@ -50,8 +50,11 @@ class ExaminationBanksController < ApplicationController
   end
 
   def destroy
-    @exam.destroy!
-    render_ok
+    ActiveRecord::Base.transaction do
+      ApplyAction.where(container_type: "ExaminationBank", container_id: @exam.id).destroy_all
+      @exam.destroy!
+      render_ok
+    end
   end
 
   def set_public
diff --git a/app/controllers/exercise_bank_questions_controller.rb b/app/controllers/exercise_bank_questions_controller.rb
index 1fd8ad874..46547ecb0 100644
--- a/app/controllers/exercise_bank_questions_controller.rb
+++ b/app/controllers/exercise_bank_questions_controller.rb
@@ -372,7 +372,7 @@ class ExerciseBankQuestionsController < ApplicationController
   private
 
   def bank_admin
-    tip_exception(403, "无权限") unless @exercise.user_id == current_user.id || current_user.admin?
+    tip_exception(403, "无权限") unless @exercise.user_id == current_user.id || current_user.admin_or_business?
   end
 
   def get_exercise
diff --git a/app/controllers/exercise_banks_controller.rb b/app/controllers/exercise_banks_controller.rb
index 9a35bfcdb..556b445ba 100644
--- a/app/controllers/exercise_banks_controller.rb
+++ b/app/controllers/exercise_banks_controller.rb
@@ -26,7 +26,7 @@ class ExerciseBanksController < ApplicationController
     search = params[:search]
     type = params[:type]
     # 超级管理员用户显示所有未隐藏的实训、非管理员显示所有已发布的实训（对本单位公开且未隐藏未关闭）
-    if current_user.admin?
+    if current_user.admin_or_business?
       @shixuns = Shixun.unhidden
     else
       none_shixun_ids = ShixunSchool.where("school_id != #{current_user.school_id}").pluck(:shixun_id)
@@ -67,7 +67,7 @@ class ExerciseBanksController < ApplicationController
   end
 
   def bank_admin
-    tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin?
+    tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin_or_business?
   end
 
   #判断实训是否已选择
diff --git a/app/controllers/graduation_works_controller.rb b/app/controllers/graduation_works_controller.rb
index 9e119a3c8..fd47df172 100644
--- a/app/controllers/graduation_works_controller.rb
+++ b/app/controllers/graduation_works_controller.rb
@@ -411,7 +411,7 @@ class GraduationWorksController < ApplicationController
   # 删除教师/教辅的评分记录
   def delete_score
     score = @work.graduation_work_scores.where(id: params[:comment_id]).first
-    if score.present? && (score.is_invalid || score.score.nil?) && (score.user == current_user || current_user.admin?)
+    if score.present? && (score.is_invalid || score.score.nil?) && (score.user == current_user || current_user.admin_or_business?)
       begin
         score.destroy
         normal_status("删除成功")
diff --git a/app/controllers/gtopic_banks_controller.rb b/app/controllers/gtopic_banks_controller.rb
index f09a8554c..504868a6e 100644
--- a/app/controllers/gtopic_banks_controller.rb
+++ b/app/controllers/gtopic_banks_controller.rb
@@ -26,7 +26,7 @@ class GtopicBanksController < ApplicationController
   end
 
   def bank_admin
-    tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin?
+    tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin_or_business?
   end
 
   def gtopic_bank_params
diff --git a/app/controllers/homework_banks_controller.rb b/app/controllers/homework_banks_controller.rb
index 61bded033..00efbbd5f 100644
--- a/app/controllers/homework_banks_controller.rb
+++ b/app/controllers/homework_banks_controller.rb
@@ -47,7 +47,7 @@ class HomeworkBanksController < ApplicationController
   end
 
   def bank_admin
-    tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin?
+    tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin_or_business?
   end
 
   def bank_params
diff --git a/app/controllers/homework_commons_controller.rb b/app/controllers/homework_commons_controller.rb
index f9931c370..1d47fa293 100644
--- a/app/controllers/homework_commons_controller.rb
+++ b/app/controllers/homework_commons_controller.rb
@@ -145,7 +145,7 @@ class HomeworkCommonsController < ApplicationController
         @student_works = @homework.teacher_works(@member)
         @all_member_count = @student_works.size
         @score_open = true
-      elsif @user_course_identity > Course::STUDENT && @homework.work_public
+      elsif @user_course_identity > Course::STUDENT
         @student_works = student_works
         @score_open = false
       else
@@ -757,7 +757,7 @@ class HomeworkCommonsController < ApplicationController
     search = params[:search]
     type = params[:type]
     # 超级管理员用户显示所有未隐藏的实训、非管理员显示所有已发布的实训（对本单位公开且未隐藏未关闭）
-    if current_user.admin?
+    if current_user.admin_or_business?
       @shixuns = Shixun.unhidden
     else
       none_shixun_ids = ShixunSchool.where("school_id != #{current_user.school_id}").pluck(:shixun_id)
diff --git a/app/controllers/item_banks_controller.rb b/app/controllers/item_banks_controller.rb
index 8b77e3e9a..221e754a4 100644
--- a/app/controllers/item_banks_controller.rb
+++ b/app/controllers/item_banks_controller.rb
@@ -31,8 +31,11 @@ class ItemBanksController < ApplicationController
   end
 
   def destroy
-    @item.destroy!
-    render_ok
+    ActiveRecord::Base.transaction do
+      ApplyAction.where(container_type: "ItemBank", container_id: @item.id).destroy_all
+      @item.destroy!
+      render_ok
+    end
   end
 
   def set_public
diff --git a/app/controllers/messages_controller.rb b/app/controllers/messages_controller.rb
index 5dcda0e9a..7b096f1ec 100644
--- a/app/controllers/messages_controller.rb
+++ b/app/controllers/messages_controller.rb
@@ -127,7 +127,7 @@ class MessagesController < ApplicationController
   end
 
   def create
-    return normal_status(403, "您没有权限进行该操作") unless current_user.admin? || current_user.member_of_course?(@board.course)
+    return normal_status(403, "您没有权限进行该操作") unless current_user.admin_or_business? || current_user.member_of_course?(@board.course)
 
     begin
       @message = Message.new(message_params)
diff --git a/app/controllers/poll_bank_questions_controller.rb b/app/controllers/poll_bank_questions_controller.rb
index 71f302115..9e3e890b0 100644
--- a/app/controllers/poll_bank_questions_controller.rb
+++ b/app/controllers/poll_bank_questions_controller.rb
@@ -114,7 +114,7 @@ class PollBankQuestionsController < ApplicationController
   private
 
   def bank_admin
-    tip_exception(403, "无权限") unless @poll.user_id == current_user.id || current_user.admin?
+    tip_exception(403, "无权限") unless @poll.user_id == current_user.id || current_user.admin_or_business?
   end
 
   def get_poll
diff --git a/app/controllers/question_banks_controller.rb b/app/controllers/question_banks_controller.rb
index ddb0f3ce1..5183c7a96 100644
--- a/app/controllers/question_banks_controller.rb
+++ b/app/controllers/question_banks_controller.rb
@@ -10,7 +10,7 @@ class QuestionBanksController < ApplicationController
   def bank_list
     page = params[:page] || 1
     limit = params[:limit] || 15
-    @certification_teacher = current_user.is_certification_teacher || current_user.admin?
+    @certification_teacher = current_user.is_certification_teacher || current_user.admin_or_business?
     @objects = @object_type.classify.constantize.where(@object_filter)
     @objects =
         if params[:search]
@@ -134,7 +134,7 @@ class QuestionBanksController < ApplicationController
   def destroy
     bank = current_bank
 
-    unless current_user.admin? || bank.user_id == current_user.id
+    unless current_user.admin_or_business? || bank.user_id == current_user.id
       render_forbidden
       return
     end
@@ -165,7 +165,7 @@ class QuestionBanksController < ApplicationController
 
   def object_banks
     banks ||= @object_type.classify.constantize.where(@object_filter).where(id: params[:object_id])
-    unless current_user.admin?
+    unless current_user.admin_or_business?
       banks = banks.where(user_id: current_user.id)
     end
     banks
@@ -202,7 +202,7 @@ class QuestionBanksController < ApplicationController
   end
 
   def teacher_or_admin
-    tip_exception(403, "无权限操作") unless current_user.is_certification_teacher || current_user.admin?
+    tip_exception(403, "无权限操作") unless current_user.is_certification_teacher || current_user.admin_or_business?
   end
 
   def quote_homework_bank homework, course
diff --git a/app/controllers/task_banks_controller.rb b/app/controllers/task_banks_controller.rb
index 2b1a400ef..768c4cb2a 100644
--- a/app/controllers/task_banks_controller.rb
+++ b/app/controllers/task_banks_controller.rb
@@ -29,7 +29,7 @@ class TaskBanksController < ApplicationController
   end
 
   def bank_admin
-    tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin?
+    tip_exception(403, "无权限") unless @bank.user_id == current_user.id || current_user.admin_or_business?
   end
 
   def gtask_bank_params
diff --git a/app/controllers/users/question_banks_controller.rb b/app/controllers/users/question_banks_controller.rb
index c5b837d0b..73d1d4dec 100644
--- a/app/controllers/users/question_banks_controller.rb
+++ b/app/controllers/users/question_banks_controller.rb
@@ -66,9 +66,9 @@ class Users::QuestionBanksController < Users::BaseController
 
   def check_user_permission!
     if params[:type] == 'publicly'
-      normal_status(-2,"未通过职业认证") unless User.current.admin? || User.current.certification_teacher?
+      normal_status(-2,"未通过职业认证") unless User.current.admin_or_business? || User.current.certification_teacher?
     else
-      render_forbidden unless User.current.admin? || User.current.is_teacher?
+      render_forbidden unless User.current.admin_or_business? || User.current.is_teacher?
     end
   end
 end
\ No newline at end of file
diff --git a/app/controllers/weapps/courses_controller.rb b/app/controllers/weapps/courses_controller.rb
index cb3c195d6..d732416ba 100644
--- a/app/controllers/weapps/courses_controller.rb
+++ b/app/controllers/weapps/courses_controller.rb
@@ -39,7 +39,7 @@ class Weapps::CoursesController < Weapps::BaseController
     @page = (params[:page] || 1).to_i
     @limit = (params[:limit] || 20).to_i
     search = params[:search].present? ? params[:search].strip : ""
-    if @course.try(:id) != 1309 || current_user.admin? || current_user.try(:id) == 15582
+    if @course.try(:id) != 1309 || current_user.admin_or_business? || current_user.try(:id) == 15582
       @teacher_list = @course.course_members.joins(:user).where("course_members.role in (1, 2, 3)")
     else
       @teacher_list = @course.course_members.joins(:user).where("(course_members.role in (1, 3) or (course_members.user_id = #{current_user.id}
@@ -203,6 +203,6 @@ class Weapps::CoursesController < Weapps::BaseController
 
   def set_course
     @course = Course.find_by!(id: params[:id])
-    tip_exception(404, "") if @course.is_delete == 1 && !current_user.admin?
+    tip_exception(404, "") if @course.is_delete == 1 && !current_user.admin_or_business?
   end
 end
\ No newline at end of file
diff --git a/app/helpers/export_helper.rb b/app/helpers/export_helper.rb
index 22adf3005..8b61ca2b6 100644
--- a/app/helpers/export_helper.rb
+++ b/app/helpers/export_helper.rb
@@ -47,9 +47,10 @@ module ExportHelper
       user_name = user.real_name
       user_mail = user.mail
       user_stu_id = user.student_id.present? ? (user.student_id.to_s + "\t") : "--"
+      user_grade = user.grade
       user_school = user.school_name
       user_course_group = u.course_group_name
-      user_info_array = [user_name,user_login,user_mail,user_stu_id,user_school,user_course_group]   #用户的信息集合
+      user_info_array = [user_name,user_login,user_mail,user_stu_id,user_grade,user_school,user_course_group]   #用户的信息集合
       user_work_scores = []
 
       #学生总成绩
@@ -150,7 +151,7 @@ module ExportHelper
     course_user_score_title = "学生总成绩"
     score_title_cells = shixun_titles + common_titles + group_titles + task_titles + exercise_titles
     score_title_counts = [shixun_titles.count,common_titles.count,group_titles.count,task_titles.count,exercise_titles.count]
-    score_cell_head = %w(序号 真实姓名 登录名 邮箱 学号 学校 分班 个人总成绩) + score_title_cells
+    score_cell_head = %w(序号 真实姓名 登录名 邮箱 学号 金币 学校 分班 个人总成绩) + score_title_cells
     @course_user_scores = [course_user_score_title,score_cell_head,score_title_counts,total_user_score_array]
 
     #作业的全部集合
diff --git a/app/models/course.rb b/app/models/course.rb
index 9100f8470..83d2bb56e 100644
--- a/app/models/course.rb
+++ b/app/models/course.rb
@@ -251,7 +251,7 @@ class Course < ApplicationRecord
     member = course_member(user.id)
     group_ids = if member.present?
                   member.teacher_course_groups.size > 0 ? member.teacher_course_groups.pluck(:course_group_id) : course_groups.pluck(:id)
-                elsif user.admin?
+                elsif user.admin_or_business?
                   course_groups.pluck(:id)
                 else
                   []
diff --git a/app/models/graduation_work.rb b/app/models/graduation_work.rb
index 96dce0c49..7fb0ecc24 100644
--- a/app/models/graduation_work.rb
+++ b/app/models/graduation_work.rb
@@ -55,7 +55,7 @@ class GraduationWork < ApplicationRecord
   end
 
   def delete_atta atta
-    last_score = graduation_work_scores.where.not(score: nil).last
+    last_score = graduation_work_scores.last
     (atta.author_id == User.current.id) && (last_score.blank? || last_score.try(:created_at) < atta.created_on)
   end
 
diff --git a/app/models/student_work.rb b/app/models/student_work.rb
index 4da23a30f..473efa756 100644
--- a/app/models/student_work.rb
+++ b/app/models/student_work.rb
@@ -105,7 +105,7 @@ class StudentWork < ApplicationRecord
   end
 
   def delete_atta atta
-    last_score = student_works_scores.where.not(score: nil).last
+    last_score = student_works_scores.last
     (atta.author_id == User.current.id) && (last_score.blank? || last_score.try(:created_at) < atta.created_on)
   end
 
diff --git a/app/models/student_works_score.rb b/app/models/student_works_score.rb
index af4405958..f9f4f4220 100644
--- a/app/models/student_works_score.rb
+++ b/app/models/student_works_score.rb
@@ -17,7 +17,7 @@ class StudentWorksScore < ApplicationRecord
   end
 
   def allow_delete current_user
-    (self.is_invalid || self.score.nil?) && (current_user == self.user || current_user.admin?)
+    (self.is_invalid || self.score.nil?) && (current_user == self.user || current_user.admin_or_business?)
   end
 
   # 匿评分
diff --git a/app/models/test_set.rb b/app/models/test_set.rb
index f774610ee..1fae89afa 100644
--- a/app/models/test_set.rb
+++ b/app/models/test_set.rb
@@ -1,7 +1,7 @@
 class TestSet < ApplicationRecord
   # match_rule: 匹配规则： full： 完全匹配， last： 末尾匹配
   #
-  validates :input, length: { maximum: 500 }
-  validates :input, length: { maximum: 500 }
+  validates :input, length: { maximum: 5000 }
+  validates :input, length: { maximum: 5000 }
 
 end
diff --git a/app/views/admins/shixuns/index.html.erb b/app/views/admins/shixuns/index.html.erb
index 4348f0f45..7c6264928 100644
--- a/app/views/admins/shixuns/index.html.erb
+++ b/app/views/admins/shixuns/index.html.erb
@@ -23,20 +23,21 @@
           <%= select_tag(:search_type, options_for_select(auto_trial_options), class: 'form-control') %>
         </div>
         <%= text_field_tag(:keyword, params[:keyword], class: 'form-control col-sm-2 ml-3', placeholder: '输入关键字搜索') %>
-        <div class="">
-          <a href="javascript:void(0)" class="btn btn-primary" id="shixuns-export" data-disable-with = '导出中...'>导出</a>
-        </div>
       </div>
 
       <div class="d-flex mt-3">
-        <div class="form-group">
+        <div class="form-group flex-1">
           <label for="status">fork原因：</label>
           <% fork_status_options = [['全部', ''], ["全部fork实训", "Fork"], ["实训内容升级", 'Shixun'], ["课堂教学使用", 'Course'],["实践课程使用",'Subject'],["其他原因",'Other']] %>
           <%= select_tag(:fork_status, options_for_select(fork_status_options), class: 'form-control') %>
         </div>
 
-        <%= submit_tag('搜索', class: 'btn btn-primary ml-3','data-disable-with': '搜索中...') %>
-        <%= link_to "清除", admins_shixuns_path,class: "btn btn-default",id:"shixuns-clear-search",'data-disable-with': '清除中...' %>
+        <div class="flex-1">
+          <%= submit_tag('搜索', class: 'btn btn-primary ml-3','data-disable-with': '搜索中...') %>
+          <%= link_to "清除", admins_shixuns_path,class: "btn btn-default",id:"shixuns-clear-search",'data-disable-with': '清除中...' %>
+        </div>
+
+        <a href="javascript:void(0)" class="btn btn-primary" id="shixuns-export" data-disable-with = '导出中...'>导出</a>
       </div>
     </div>
 <% end %>
diff --git a/app/views/exercise_banks/show.json.jbuilder b/app/views/exercise_banks/show.json.jbuilder
index 802e863cb..4c01f1fd1 100644
--- a/app/views/exercise_banks/show.json.jbuilder
+++ b/app/views/exercise_banks/show.json.jbuilder
@@ -2,7 +2,7 @@ if @bank.container_type == "Exercise"
   json.exercise do
     json.extract! @bank, :id, :name, :description, :is_public
   end
-  json.authorize @bank.user_id == current_user.id || current_user.admin?
+  json.authorize @bank.user_id == current_user.id || current_user.admin_or_business?
 
   json.partial! "exercises/exercise_scores"
 
@@ -21,7 +21,7 @@ else
   json.poll do
     json.extract! @bank, :id, :name, :description, :is_public
   end
-  json.authorize @bank.user_id == current_user.id || current_user.admin?
+  json.authorize @bank.user_id == current_user.id || current_user.admin_or_business?
 
   json.question_types do
     json.q_counts @poll_questions_count
diff --git a/app/views/graduation_tasks/show.json.jbuilder b/app/views/graduation_tasks/show.json.jbuilder
index 814cc62ce..8b2a553b1 100644
--- a/app/views/graduation_tasks/show.json.jbuilder
+++ b/app/views/graduation_tasks/show.json.jbuilder
@@ -1,7 +1,7 @@
 json.partial! "public_navigation", locals: {graduation: @task, course: @course}
 json.description @task.description
 json.user_id @task.user_id
-json.authorize @task.user_id == current_user.id || current_user.admin?
+json.authorize @task.user_id == current_user.id || current_user.admin_or_business?
 # 附件
 json.attachments @attachments do |attachment|
   json.partial! "attachments/attachment_simple", locals: {attachment: attachment}
diff --git a/app/views/graduation_works/comment_list.json.jbuilder b/app/views/graduation_works/comment_list.json.jbuilder
index 77898c91d..5f59a8bcf 100644
--- a/app/views/graduation_works/comment_list.json.jbuilder
+++ b/app/views/graduation_works/comment_list.json.jbuilder
@@ -15,7 +15,7 @@ json.comment_scores @comment_scores do |score|
   json.score score.score
   json.content score.comment
   json.is_invalid score.is_invalid
-  json.delete (@current_user == score.user || @current_user.admin?) && (score.is_invalid || score.score.nil?)
+  json.delete (@current_user == score.user || @current_user.admin_or_business?) && (score.is_invalid || score.score.nil?)
   json.attachments score.attachments do |atta|
     json.partial! "attachments/attachment_simple", locals: {attachment: atta, delete: false}
   end
diff --git a/app/views/gtopic_banks/show.json.jbuilder b/app/views/gtopic_banks/show.json.jbuilder
index 7ab86674d..0d32b17a3 100644
--- a/app/views/gtopic_banks/show.json.jbuilder
+++ b/app/views/gtopic_banks/show.json.jbuilder
@@ -1,6 +1,6 @@
 json.(@bank, :id, :name, :description, :is_public, :topic_type, :topic_source, :topic_property_first, :topic_property_second,
   :source_unit, :topic_repeat, :province, :city)
-json.authorize @bank.user_id == current_user.id || current_user.admin?
+json.authorize @bank.user_id == current_user.id || current_user.admin_or_business?
 
 json.attachment_list @bank_attachments do |attachment|
   json.partial! "attachments/attachment_simple", locals: {attachment: attachment}
diff --git a/app/views/homework_banks/show.json.jbuilder b/app/views/homework_banks/show.json.jbuilder
index f3785173a..82be072cf 100644
--- a/app/views/homework_banks/show.json.jbuilder
+++ b/app/views/homework_banks/show.json.jbuilder
@@ -1,5 +1,5 @@
 json.(@bank, :id, :name, :description, :homework_type, :is_public, :min_num, :max_num, :base_on_project, :reference_answer)
-json.authorize @bank.user_id == current_user.id || current_user.admin?
+json.authorize @bank.user_id == current_user.id || current_user.admin_or_business?
 
 json.attachments @bank_attachments do |attachment|
   json.partial! "attachments/attachment_simple", locals: {attachment: attachment}
diff --git a/app/views/shixun_lists/index.json.jbuilder b/app/views/shixun_lists/index.json.jbuilder
index e926ee927..9526b0173 100644
--- a/app/views/shixun_lists/index.json.jbuilder
+++ b/app/views/shixun_lists/index.json.jbuilder
@@ -21,7 +21,7 @@ json.shixun_list do
     json.pic url_to_avatar(obj)
     json.content highlights
     json.level level_to_s(obj.trainee)
-    json.subjects obj.subjects.uniq do |subject|
+    json.subjects obj.subjects.visible.unhidden.uniq do |subject|
       json.(subject, :id, :name)
     end
   end
diff --git a/app/views/student_works/show.json.jbuilder b/app/views/student_works/show.json.jbuilder
index 7b3a91b5e..8cb3ee7ca 100644
--- a/app/views/student_works/show.json.jbuilder
+++ b/app/views/student_works/show.json.jbuilder
@@ -11,7 +11,7 @@ json.update_user_name @is_evaluation ? "匿名" : @work.update_user.try(:real_na
 json.update_atta @homework.late_duration && @is_author
 
 json.attachments @attachments do |atta|
-  json.partial! "attachments/attachment_simple", locals: {attachment: atta, delete: false, }
+  json.partial! "attachments/attachment_simple", locals: {attachment: atta, delete: false }
 end
 
 unless @is_evaluation
diff --git a/app/views/task_banks/show.json.jbuilder b/app/views/task_banks/show.json.jbuilder
index ab53399e1..bc9e6d70e 100644
--- a/app/views/task_banks/show.json.jbuilder
+++ b/app/views/task_banks/show.json.jbuilder
@@ -1,6 +1,6 @@
 json.(@bank, :id, :name, :description, :task_type, :is_public)
 # 附件
-json.authorize @bank.user_id == current_user.id || current_user.admin?
+json.authorize @bank.user_id == current_user.id || current_user.admin_or_business?
 json.attachments @bank_attachments do |attachment|
   json.partial! "attachments/attachment_simple", locals: {attachment: attachment}
 end
diff --git a/app/views/users/question_banks/index.json.jbuilder b/app/views/users/question_banks/index.json.jbuilder
index 018e78254..d39341e08 100644
--- a/app/views/users/question_banks/index.json.jbuilder
+++ b/app/views/users/question_banks/index.json.jbuilder
@@ -14,5 +14,5 @@ json.question_banks @question_banks do |question_bank|
   json.course_list_name question_bank.course_list&.name
   json.updated_at question_bank.updated_at
   json.solve_count @solve_count_map.fetch(question_bank.id, 0)
-  json.authorize question_bank.user_id == current_user.id || current_user.admin?
+  json.authorize question_bank.user_id == current_user.id || current_user.admin_or_business?
 end
diff --git a/db/migrate/20200109095357_add_uniq_index_to_evaluation_distribution.rb b/db/migrate/20200109095357_add_uniq_index_to_evaluation_distribution.rb
new file mode 100644
index 000000000..6bf860ef6
--- /dev/null
+++ b/db/migrate/20200109095357_add_uniq_index_to_evaluation_distribution.rb
@@ -0,0 +1,11 @@
+class AddUniqIndexToEvaluationDistribution < ActiveRecord::Migration[5.2]
+  def change
+    sql = %Q(delete from student_works_evaluation_distributions where (user_id, student_work_id) in
+            (select * from (select user_id, student_work_id from student_works_evaluation_distributions group by user_id, student_work_id having count(*) > 1) a)
+            and id not in (select * from (select min(id) from student_works_evaluation_distributions group by user_id, student_work_id having count(*) > 1 order by id) b))
+    ActiveRecord::Base.connection.execute sql
+
+    add_index :student_works_evaluation_distributions, [:student_work_id, :user_id], name: "index_on_student_work_id_and_user_id", unique: true
+    remove_index :student_works_evaluation_distributions, :user_id
+  end
+end