diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index 781ede214..c9162448b 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -1566,15 +1566,22 @@ class ExercisesController < ApplicationController
 
   def check_user_id_start_answer #判断用户在开始答题时，是否有用户id传入,如果为老师，则id必需，否则为当前用户的id
     user_login = params[:login]
-    # exercise_current_user_id = params[:user_id]
     if user_login.blank? && @user_course_identity < Course::STUDENT  #id不存在，且当前为老师/管理员等
       normal_status(-1,"请输入学生登陆名！")
     else
-      @ex_answerer = User.find_by(login: user_login) #回答者
+      if @user_course_identity < Course::STUDENT || @exercise.score_open
+        @ex_answerer = user_login.blank? ? current_user : User.find_by(login: user_login)
+      else
+        @ex_answerer = current_user
+      end
+
       if @ex_answerer.blank?
         normal_status(404,"答题用户不存在")
+      elsif @user_course_identity > Course::STUDENT && !@exercise.is_public
+        normal_status(403,"非公开试卷")
       else
-        @exercise_current_user_id = @ex_answerer.id || current_user.id
+        # @exercise_current_user_id = @ex_answerer.id || current_user.id
+        @exercise_current_user_id = @ex_answerer.id
       end
     end
   end
diff --git a/app/views/courses/settings.json.jbuilder b/app/views/courses/settings.json.jbuilder
index be4470a66..97083d5f9 100644
--- a/app/views/courses/settings.json.jbuilder
+++ b/app/views/courses/settings.json.jbuilder
@@ -5,6 +5,7 @@ json.course_id @course.id
 json.school @course.school&.name
 json.class_period @course.class_period
 json.credit @course.credit
+json.start_date @course.start_date
 json.end_date @course.end_date
 json.is_public @course.is_public
 json.course_module_types @course.course_modules.where(hidden: 0).pluck(:module_type)
diff --git a/lib/tasks/excellent_course_exercise.rake b/lib/tasks/excellent_course_exercise.rake
index a607c24a0..07c33d9e9 100644
--- a/lib/tasks/excellent_course_exercise.rake
+++ b/lib/tasks/excellent_course_exercise.rake
@@ -38,6 +38,8 @@ namespace :excellent_course_exercise do
         rand_num = index < pass_count - 1 ? 20 : rand(1..16)
       elsif exercise_question_ids.length == 17
         rand_num = index < pass_count - 1 ? rand(13..17) : rand(1..11)
+      elsif exercise_question_ids.length == 39
+        rand_num = index < pass_count - 1 ? rand(30..39) : rand(1..18)
       else
         rand_num = exercise_question_ids.length
       end
diff --git a/public/react/src/modules/courses/coursesDetail/CoursesLeftNav.js b/public/react/src/modules/courses/coursesDetail/CoursesLeftNav.js
index b28472f66..20f46f079 100644
--- a/public/react/src/modules/courses/coursesDetail/CoursesLeftNav.js
+++ b/public/react/src/modules/courses/coursesDetail/CoursesLeftNav.js
@@ -722,15 +722,19 @@ class Coursesleftnav extends Component{
     let {url}=this.state;
     if (key === this.props.indexs) {
       this.props.unlocationNavfun(undefined)
+			this.props.history.replace(urls);
     } else {
       this.props.unlocationNavfun(key)
+			this.props.history.replace(urls);
     }
     if(urls!=url){
       this.props.history.replace(urls);
     }
-    if(this.props.indexs===undefined){
-			this.props.history.replace(urls);
-		}
+    // if(this.props.indexs===undefined){
+		//
+		// }else{
+		//
+		// }
   }
 
   maincontent=(item,key)=>{
diff --git a/public/react/src/modules/paths/PathDetail/DetailCards.js b/public/react/src/modules/paths/PathDetail/DetailCards.js
index e34666294..780ed4071 100644
--- a/public/react/src/modules/paths/PathDetail/DetailCards.js
+++ b/public/react/src/modules/paths/PathDetail/DetailCards.js
@@ -226,10 +226,11 @@ class DetailCards extends Component{
 					startshixunCombattype:true,
 				})
 			} else {
-				window.location.href = "/tasks/" + response.data.game_identifier;
+				// window.location.href = "/tasks/" + response.data.game_identifier;
 				// window.location.href = path
 				// let path="/tasks/"+response.data.game_identifier;
 				// this.props.history.push(path);
+				window.open("/tasks/" + response.data.game_identifier);
 			}
 		}).catch((error) => {
 
diff --git a/public/react/src/modules/user/usersInfo/video/InfosVideo.css b/public/react/src/modules/user/usersInfo/video/InfosVideo.css
index 169c3802c..4722fde63 100644
--- a/public/react/src/modules/user/usersInfo/video/InfosVideo.css
+++ b/public/react/src/modules/user/usersInfo/video/InfosVideo.css
@@ -26,7 +26,7 @@
     height: 158px;
     cursor: pointer;
 }
-.nItem.videoItem:hover .playWrap {.videoItem img.play
+.nItem.videoItem:hover .playWrap {
     display: inline-block;
 }
 .nItem .mask {
diff --git a/public/react/src/modules/user/usersInfo/video/VideoUploadList.js b/public/react/src/modules/user/usersInfo/video/VideoUploadList.js
index 06a4029da..5e1cbeb51 100644
--- a/public/react/src/modules/user/usersInfo/video/VideoUploadList.js
+++ b/public/react/src/modules/user/usersInfo/video/VideoUploadList.js
@@ -10,6 +10,7 @@ import { getUploader } from './AliyunUploaderManager'
 import { reducer, initialState } from './VideoReducer'
 import { deleteVideoInCloud } from './VideoUtil'
 import uploadIcon from './images/upload.png'
+import uploadHoverIcon from './images/upload_hover.png'
 
 let uploader
 const files = []
@@ -167,21 +168,29 @@ function VideoUploadList (props) {
         const _input = document.getElementById('fileUpload')
         _input.value = ''
     }
-    //  uploader.deleteFile(index);
-    function cancelUpload(index, isSuccess) {
-        // TODO 确定取消？
+    function doDelete(index, isSuccess) {
         uploader.deleteFile(index)
+        // uploader.cancelFile(index)
         if (isSuccess) {
            deleteVideoInCloud(username, state.videoes[index].videoId)
         } 
-        // else {
-            // uploader.cancelFile(index)
-        // }
-       clearInput()
-
+            
+        clearInput()
         dispatch({type: 'removeVideo', index}) 
         // setVideoes([...videoes.splice(index, 1)])
     }
+    //  uploader.deleteFile(index);
+    function cancelUpload(index, isSuccess) {
+        props.confirm({
+            content: <div>
+                <div>您确认要{isSuccess ? '删除' : '取消上传'}该视频吗？</div>
+            </div>,
+            onOk: () => {
+                doDelete(index, isSuccess)
+            }
+        })
+        
+    }
     function onPublish() {
         if (state.videoes.length == 0) {
             showNotification('请先上传视频')
@@ -291,6 +300,26 @@ function VideoUploadList (props) {
                     border-bottom: none;
                 }
                 
+                .noUploads img {
+                    width: 64px;
+                    height: 48px;
+
+                }
+                .noUploads .uploadHoverIcon {
+                    display: none;
+                }
+                .noUploads .imgWrap:hover .uploadHoverIcon {
+                    display: inline;
+                }
+                .noUploads .imgWrap:hover .uploadIcon {
+                    display: none;
+                }
+                .noUploads .imgWrap {
+                    width: 72px;
+                    height: 54px;
+                    margin: 0 auto;
+                    cursor: pointer;
+                }
             `}</style>
             <CBreadcrumb
                 className="mb26"
@@ -308,8 +337,13 @@ function VideoUploadList (props) {
             
             <div className="section">
                 {/* noUploads */}
-                {noUploads && <div className="noUploads" style={{paddingTop: '72px'}}>
-                    <img src={uploadIcon} onClick={() => document.getElementById('fileUpload').click()}></img>
+                {noUploads && <div className="noUploads" style={{paddingTop: '72px'}} >
+                    <div className="imgWrap" onClick={() => document.getElementById('fileUpload').click()}>
+                        <img className="uploadIcon" src={uploadIcon} ></img>
+                        <img className="uploadHoverIcon" src={uploadHoverIcon} ></img>
+                    </div>
+
+                    
                     <div style={{
                         color: '#000000',
                         fontSize: '18px',
diff --git a/public/react/src/modules/user/usersInfo/video/images/upload_hover.png b/public/react/src/modules/user/usersInfo/video/images/upload_hover.png
new file mode 100644
index 000000000..6fd27af9f
Binary files /dev/null and b/public/react/src/modules/user/usersInfo/video/images/upload_hover.png differ