diff --git a/app/controllers/exercise_controller.rb b/app/controllers/exercise_controller.rb
index 55daf0562..a99ab32ec 100644
--- a/app/controllers/exercise_controller.rb
+++ b/app/controllers/exercise_controller.rb
@@ -9,6 +9,10 @@ class ExerciseController < ApplicationController
     publish_exercises = Exercise.where("publish_time is not null and exercise_status = 1 and publish_time <=?",Time.now)
     publish_exercises.each do |exercise|
       exercise.update_column('exercise_status', 2)
+      course = exercise.course
+      course.members.each do |m|
+        exercise.course_messages << CourseMessage.new(:user_id => m.user_id, :course_id => course.id, :viewed => false, :status => 2)
+      end
     end
     end_exercises = Exercise.where("end_time <=? and exercise_status = 2",Time.now)
     end_exercises.each do |exercise|
@@ -35,6 +39,10 @@ class ExerciseController < ApplicationController
     publish_exercises = Exercise.where("publish_time is not null and exercise_status = 1 and publish_time <=?",Time.now)
     publish_exercises.each do |exercise|
       exercise.update_column('exercise_status', 2)
+      course = exercise.course
+      course.members.each do |m|
+        exercise.course_messages << CourseMessage.new(:user_id => m.user_id, :course_id => course.id, :viewed => false, :status => 2)
+      end
     end
     end_exercises = Exercise.where("end_time <=? and exercise_status = 2",Time.now)
     end_exercises.each do |exercise|
@@ -504,6 +512,10 @@ class ExerciseController < ApplicationController
         @exercise.update_attributes(:show_result => params[:show_result])
         @exercise.update_attributes(:exercise_status => 2)
         @exercise.update_attributes(:publish_time => Time.now)
+        course = @exercise.course
+        course.members.each do |m|
+          @exercise.course_messages << CourseMessage.new(:user_id => m.user_id, :course_id => course.id, :viewed => false, :status => 2)
+        end
         redirect_to exercise_url(@exercise)
         return
       elsif @exercise.publish_time > Time.now
diff --git a/app/views/users/_user_message_course.html.erb b/app/views/users/_user_message_course.html.erb
index 566677964..640f98b1f 100644
--- a/app/views/users/_user_message_course.html.erb
+++ b/app/views/users/_user_message_course.html.erb
@@ -640,9 +640,9 @@
               <!--<li>发布时间：<%#= ma.course_message.publish_time.to_s.gsub("+0800","").to_datetime.strftime("%Y-%m-%d %H:%M:%S") %></li>-->
                <!--<%# end %>-->
               <li>截止时间：<%= ma.course_message.end_time.to_s.gsub("+0800","").to_datetime.strftime("%Y-%m-%d %H:%M:%S") %></li>
-              <li>答题时间：<%= ma.course_message.time == 0 ? '不限时' : ma.course_message.time.to_s + '分钟' %></li>
+              <li>答题时长：<%= ma.course_message.time == -1 ? '不限时' : ma.course_message.time.to_s + '分钟' %></li>
               <% if !User.current.allowed_to?(:as_teacher,ma.course_message.course)%>
-                <p>请记得在截止时间前完成测验噢,辛苦啦！</p>
+                <p>请记得在截止时间前完成测验噢，辛苦啦！</p>
               <% end %>
             </ul>
           </div>
@@ -674,7 +674,7 @@
               <li>课程名称：<%= ma.course_message.course.name %>(<%= ma.course_message.course.time.to_s + '年'+ ma.course_message.course.term %>)</li>
               <li>测验标题：<%= ma.course_message.exercise_name %></li>
               <li>截止时间：<%= ma.course_message.end_time.to_s.gsub("+0800","").to_datetime.strftime("%Y-%m-%d %H:%M:%S") %></li>
-              <li>答题时间：<%= ma.course_message.time == 0 ? '无限制' : ma.course_message.time.to_s + '分钟' %></li>
+              <li>答题时长：<%= ma.course_message.time == -1 ? '无限制' : ma.course_message.time.to_s + '分钟' %></li>
               <p>请及时完成课程测验，辛苦啦！</p>
             </ul>
           </div>
diff --git a/lib/tasks/exercise_close_to_deadline_warn.rake b/lib/tasks/exercise_close_to_deadline_warn.rake
index 2deb7204e..e2808818f 100644
--- a/lib/tasks/exercise_close_to_deadline_warn.rake
+++ b/lib/tasks/exercise_close_to_deadline_warn.rake
@@ -1,5 +1,5 @@
 #coding=utf-8
-
+#需要在0点以后执行
 namespace :exercise_deadline_warn do
   desc "exercise deadline warn"
   task :deadline_warn => :environment do