diff --git a/public/react/src/modules/courses/busyWork/CommonWorkItem.js b/public/react/src/modules/courses/busyWork/CommonWorkItem.js
index 2ac4761e1..f30e43d21 100644
--- a/public/react/src/modules/courses/busyWork/CommonWorkItem.js
+++ b/public/react/src/modules/courses/busyWork/CommonWorkItem.js
@@ -97,13 +97,6 @@ class CommonWorkItem extends Component{
   setupdate = () => {
   }
 
-  toCreateProject = () => {
-    if (window.location.port == 3007) {
-      window.location.href = '/testbdweb.educoder.net/projects/new'
-    } else {
-      window.location.href = '/projects/new'
-    }
-  }
   render(){
     let { mainList,workType }=this.props;
     const { aModalVisible, fileList, revise_reason } = this.state
diff --git a/public/react/src/modules/courses/busyWork/ConnectProject.js b/public/react/src/modules/courses/busyWork/ConnectProject.js
index 73a4da8f8..c1fd4185c 100644
--- a/public/react/src/modules/courses/busyWork/ConnectProject.js
+++ b/public/react/src/modules/courses/busyWork/ConnectProject.js
@@ -85,13 +85,6 @@ class ConnectProject extends Component{
       console.log(error);
     })
   }
-  toCreateProject = () => {
-    if (window.location.port == 3007) {
-      window.location.href = '/testbdweb.educoder.net/projects/new'
-    } else {
-      window.location.href = '/projects/new'
-    }
-  }
   //关联项目
   openConnectionProject=(work)=>{
     this.work = work;
@@ -175,7 +168,7 @@ class ConnectProject extends Component{
               {
                 (!haveProjects) &&
                 <div className="edu-txt-center">
-                  您当前尚未管理任何项目，请先<WordsBtn style="blue" className="" onClick={this.toCreateProject}>创建项目</WordsBtn>再关联
+                  您当前尚未管理任何项目，请先<WordsBtn style="blue" className="" onClick={this.props.toCreateProject}>创建项目</WordsBtn>再关联
                 </div>
               }
               
diff --git a/public/react/src/modules/courses/busyWork/NewWork.js b/public/react/src/modules/courses/busyWork/NewWork.js
index a6fc93c92..c30832c8f 100644
--- a/public/react/src/modules/courses/busyWork/NewWork.js
+++ b/public/react/src/modules/courses/busyWork/NewWork.js
@@ -477,7 +477,7 @@ class NewWork extends Component{
                         <span className="ml15 mr15">~</span>
                         {/* min={has_commit ? init_max_num : (min_num == undefined ? 2 : min_num + 1) }  */}
                         <ConditionToolTip condition={has_commit} title={'已有提交作品，人数范围只能扩大'}>
-                          <InputNumber className="winput-240-40" placeholder="请填写每组最大人数" value={max_num}  
+                          <InputNumber className="winput-240-40" placeholder="请填写每组最大人数" value={max_num} max={10}
                               onChange={this.max_num_change} style={{width:'180px'}} />
                         </ConditionToolTip>
                         <label className="color-grey-9 ml20 font-14">（项目管理员角色的成员都可以提交作品，提交作品时需要关联同组成员，组内成员作品共享）</label>
diff --git a/public/react/src/modules/courses/busyWork/common.js b/public/react/src/modules/courses/busyWork/common.js
index 61bd7fcee..9eb901d9d 100644
--- a/public/react/src/modules/courses/busyWork/common.js
+++ b/public/react/src/modules/courses/busyWork/common.js
@@ -17,6 +17,13 @@ export function RouteHOC(options = {}) {
           
         }
       }
+      toCreateProject = () => {
+        if (window.location.port == 3007) {
+          window.location.href = '/testbdweb.educoder.net/projects/new'
+        } else {
+          window.location.href = '/projects/new'
+        }
+      }
       // common_homework   group_homework
       // 是否是分组作业
       isGroup = () => {
@@ -156,7 +163,7 @@ export function RouteHOC(options = {}) {
                 toWorkQuestionPage={this.toWorkQuestionPage}
                 toWorkSettingPage={this.toWorkSettingPage}
                 
-
+                toCreateProject={this.toCreateProject}
 
                 isGroup={this.isGroup}
                 getModuleName={this.getModuleName}
diff --git a/public/react/src/modules/courses/exercise/ExerciseDisplay.js b/public/react/src/modules/courses/exercise/ExerciseDisplay.js
index 5992210b4..4da4768d2 100644
--- a/public/react/src/modules/courses/exercise/ExerciseDisplay.js
+++ b/public/react/src/modules/courses/exercise/ExerciseDisplay.js
@@ -69,20 +69,23 @@ class ExerciseDisplay extends Component{
 
     return(
         <div className="edu-back-white">
-          <div className={"bor-bottom-greyE padding20-30"}>
+          <div className={" padding20-30"}>
             <style>
               {
                 `
                 .center{
-                text-align: center;
+                  text-align: center;
+                }
+                .edu-back-white>.bor-bottom-greyE:last-child {
+                  border-bottom: none !important;
                 }
                 `
               }
             </style>
             <div className={"font-18 center"}>{exercise&&exercise.exercise_name}</div>
-            <div className={"font-14 center color-grey-9"}>{exercise&&exercise.exercise_description}</div>
+            <div className={"font-14 color-grey-9"}>{exercise&&exercise.exercise_description}</div>
           </div>
-					<div className={"bor-bottom-greyE padding20-30 newContainer"}>
+					<div className={" padding20-30 newContainer"}>
 						<p className="  clearfix">
 							{
 								exercise_types && exercise_types.q_singles > 0 &&
diff --git a/public/react/src/modules/courses/exercise/ExerciseNew.js b/public/react/src/modules/courses/exercise/ExerciseNew.js
index 8bc7ed6ae..0e1489c72 100644
--- a/public/react/src/modules/courses/exercise/ExerciseNew.js
+++ b/public/react/src/modules/courses/exercise/ExerciseNew.js
@@ -342,6 +342,11 @@ class ExerciceNew extends Component{
     this.editingId = null;
     this.fetchExercise()
   }
+  goToPreview = () => {
+    const exercise_id = this.props.match.params.Id
+    const courseId = this.props.match.params.coursesId
+    this.props.history.push(`/courses/${courseId}/exercises/${exercise_id}/student_exercise_list?tab=2`)
+  }
   render() {
     let { exercise_name, exercise_description, course_id, exercise_types,
       exercise_questions, left_banner_id  } = this.state;
@@ -366,6 +371,8 @@ class ExerciceNew extends Component{
 
     const isAdmin = this.props.isAdmin()
     const courseId=this.props.match.params.coursesId;
+    const exercise_id = this.props.match.params.Id
+
     const isEdit = this.isEdit
     const commonHandler = {
       onQestionDelete: this.onQestionDelete,
@@ -395,7 +402,7 @@ class ExerciceNew extends Component{
               background: #fff;
             }
             .exerciseNew .markdown-body {
-              max-width: 1088px;
+              max-width: 1128px;
             }
           `}</style>
           <div className="edu-class-container edu-position courseForm">
@@ -546,6 +553,11 @@ class ExerciceNew extends Component{
                 <ActionBtn style="green" className="mr20" onClick={() => this.addShixun(null)}>
                   <i className="iconfont icon-tianjiafangda color-white font-14 mr5" style={{ marginTop: '-1px', display: 'inline-block'}}></i>实训题
                 </ActionBtn>
+
+                {exercise_id && <ActionBtn style="blue" className="fr" onClick={() => this.goToPreview()}>
+                  {/* <i className="iconfont icon-tianjiafangda color-white font-14 mr5" style={{ marginTop: '-1px', display: 'inline-block'}}></i> */}
+                  试卷预览
+                </ActionBtn>}
               </div>}
             </div>
 
diff --git a/public/react/src/modules/courses/exercise/new/NullChildEditor.js b/public/react/src/modules/courses/exercise/new/NullChildEditor.js
index a78028b20..434211f1d 100644
--- a/public/react/src/modules/courses/exercise/new/NullChildEditor.js
+++ b/public/react/src/modules/courses/exercise/new/NullChildEditor.js
@@ -39,14 +39,14 @@ class NullChildEditor extends Component{
     let { question_title, question_score, question_type, question_choices, standard_answers } = this.state;
     let { question_id, index, onAnswerChange, addChildAnswer, toMDMode, exerciseIsPublish, 
         answers } = this.props;
-    
+    // marginTop: '18px'
     return(
-        <div className="df" style={{ marginTop: '18px'}}>
+        <div className="df" style={{ }}>
             <div className="color-grey-6 mb5 mt6" style={{ flex: '0 0 90px'}}>答案(填空{index + 1}):</div>
             <div className="df flex1" style={{flexDirection: 'column'}}>
             {
                 answers.map((item, itemIndex) => {
-                    return <div className="df mb20 flex1" >
+                    return <div className="df flex1" >
                     <div className="flex1" style={{ flex: '0 0 1000px'}}>
                       <DMDEditor
                           className={'nullChildEditor'}
diff --git a/public/react/src/modules/courses/exercise/new/NullDisplay.js b/public/react/src/modules/courses/exercise/new/NullDisplay.js
index e507829ed..e5c604767 100644
--- a/public/react/src/modules/courses/exercise/new/NullDisplay.js
+++ b/public/react/src/modules/courses/exercise/new/NullDisplay.js
@@ -80,12 +80,14 @@ class NullDisplay extends Component{
                 .answers .answer {
                     background: #EDEDED;
                     color: #C5C5C5;
-                    width: 100%;
+                    
                     display: inline-block;
                     line-height: 16px;
                     padding:12px 10px;
                     margin-bottom:10px;
                     border-radius:2px;
+                    max-width: 1024px;
+                    word-break: break-all;
                 }
                 .answerRow { 
                     padding: 1px 0;
diff --git a/public/react/src/modules/courses/exercise/new/NullEditor.js b/public/react/src/modules/courses/exercise/new/NullEditor.js
index b24768e96..d996a524d 100644
--- a/public/react/src/modules/courses/exercise/new/NullEditor.js
+++ b/public/react/src/modules/courses/exercise/new/NullEditor.js
@@ -282,7 +282,7 @@ class NullEditor extends Component{
                 display: inline-block;
               }
               .content_editorMd_show {
-
+                display: flex;
                 maxWidth: 1000px;
               }
             `}</style>
diff --git a/public/react/src/modules/courses/exercise/new/SingleDisplay.js b/public/react/src/modules/courses/exercise/new/SingleDisplay.js
index 8973d53db..453cce229 100644
--- a/public/react/src/modules/courses/exercise/new/SingleDisplay.js
+++ b/public/react/src/modules/courses/exercise/new/SingleDisplay.js
@@ -71,7 +71,7 @@ class SingleDisplay extends Component{
     let length = 5;
     const qName = qNameArray[question_type]
     return(
-        <div className="bor-bottom-greyE padding20-30" id={qNumber} _id={question_id}>
+        <div className="bor-bottom-greyE padding20-30 singleDisplay" id={qNumber} _id={question_id}>
             <style>{`
               .optionMdEditor {
                 flex: 0 0 800px
diff --git a/public/react/src/modules/courses/exercise/new/SingleEditor.js b/public/react/src/modules/courses/exercise/new/SingleEditor.js
index 02efe2443..6120e9aea 100644
--- a/public/react/src/modules/courses/exercise/new/SingleEditor.js
+++ b/public/react/src/modules/courses/exercise/new/SingleEditor.js
@@ -219,9 +219,10 @@ class SingleEditor extends Component{
               }
               .optionRow {
                 margin:0px!important;
-                margin-bottom: 20px!important;
+                /* margin-bottom: 20px!important; */
               }
               .signleEditor .content_editorMd_show{
+                display: flex;
                 margin-top:0px!important;
                 border-radius:2px;
                 max-width: 1056px;
diff --git a/public/react/src/modules/courses/exercise/new/common.css b/public/react/src/modules/courses/exercise/new/common.css
index 47dcf5283..0fef369e3 100644
--- a/public/react/src/modules/courses/exercise/new/common.css
+++ b/public/react/src/modules/courses/exercise/new/common.css
@@ -29,4 +29,8 @@
 .nullChildEditor {
     width: 100%;
     display: inline-block;
+}
+
+.singleDisplay .options .markdown-body {
+    max-width: 1116px;
 }
\ No newline at end of file
diff --git a/public/react/src/modules/tpm/challengesnew/TPMMDEditor.js b/public/react/src/modules/tpm/challengesnew/TPMMDEditor.js
index 0f00d1c25..47efccf74 100644
--- a/public/react/src/modules/tpm/challengesnew/TPMMDEditor.js
+++ b/public/react/src/modules/tpm/challengesnew/TPMMDEditor.js
@@ -80,8 +80,15 @@ function md_elocalStorage(editor,mdu,id){
                 md_add_data("content",mdu,editor.getValue());
                 var id1 = "#e_tip_"+id;
                 var id2 = "#e_tips_"+id;
-
-                $(id2).html(" 数据已于 " + h + ':' + m + ':' + s +" 保存   ");
+                
+                var textStart = " 数据已于 "
+                var text = textStart + h + ':' + m + ':' + s +" 保存 ";
+                // 占位符   
+                if ($(id2).html() && $(id2).html() != '　' && $(id2).html().startWith(textStart) == false) {
+                    $(id2).html( $(id2).html().split('　(')[0] + `　(${text})`);
+                } else {
+                    $(id2).html(text);
+                }
                 // $(id2).html("");
             }
         },10000);