diff --git a/public/react/src/modules/courses/exercise/new/NullChildEditor.js b/public/react/src/modules/courses/exercise/new/NullChildEditor.js
index 5146f05ec..d2f710e55 100644
--- a/public/react/src/modules/courses/exercise/new/NullChildEditor.js
+++ b/public/react/src/modules/courses/exercise/new/NullChildEditor.js
@@ -19,11 +19,11 @@ const { Option } = Select;
 class NullChildEditor extends Component{
   constructor(props){
     super(props);
-    
+
     this.state = {
     }
   }
-  
+
   // toMDMode = (that) => {
   //   if (this.mdReactObject) {
   //     let mdReactObject = this.mdReactObject;
@@ -41,7 +41,7 @@ class NullChildEditor extends Component{
 
   render() {
     let { question_title, question_score, question_type, question_choices, standard_answers } = this.state;
-    let { question_id, index, onAnswerChange, addChildAnswer, toMDMode, exerciseIsPublish, 
+    let { question_id, index, onAnswerChange, addChildAnswer, toMDMode, exerciseIsPublish,
         answers } = this.props;
     // marginTop: '18px'
     return(
@@ -57,18 +57,24 @@ class NullChildEditor extends Component{
                           className={'nullChildEditor'}
                           placeholder={`请输入参考答案${itemIndex == 0 ?'':'(可选)'}`}
                           toMDMode={toMDMode} noStorage={true}
-                          mdID={`answer_${index}${itemIndex}`} height={155} 
+                          mdID={`answer_${index}${itemIndex}`} height={155}
                           initValue={item} onChange={(val) => onAnswerChange(index, itemIndex, val)}
                       ></DMDEditor>
                     </div>
-                    {!exerciseIsPublish && 
+                    {!exerciseIsPublish &&
                     <React.Fragment>
                       {itemIndex != 0 && <Tooltip title="删除">
-                        <i className="iconfont icon-htmal5icon19 font-18 color-grey-c ml10" 
+                        <i className="iconfont icon-htmal5icon19 font-18 color-grey-c ml10"
                             onClick={() => this.props.deleteChildAnswer(index, itemIndex)}
                             style={{float: 'right'}}
                         ></i>
                       </Tooltip> }
+                      {itemIndex === 0 && <Tooltip title="删除">
+                        <i className="iconfont icon-htmal5icon19 font-18 color-grey-c ml10"
+                           onClick={() => this.props.deleteChildAnswermain(index, itemIndex)}
+                           style={{float: 'right'}}
+                        ></i>
+                      </Tooltip> }
                       { <Tooltip title={`新增参考答案`}>
                           <i className="color-green font-16 iconfont icon-roundaddfill ml6"
                             onClick={() => addChildAnswer(index)}
diff --git a/public/react/src/modules/courses/exercise/new/NullEditor.js b/public/react/src/modules/courses/exercise/new/NullEditor.js
index dcb310396..9b5dcf9ef 100644
--- a/public/react/src/modules/courses/exercise/new/NullEditor.js
+++ b/public/react/src/modules/courses/exercise/new/NullEditor.js
@@ -38,7 +38,7 @@ class NullEditor extends Component{
         answers.answer_text.forEach((item, itemIndex) => {
           _standard_answers[index].push(item)
         })
-        
+
       })
     }
     this.state = {
@@ -53,7 +53,7 @@ class NullEditor extends Component{
     this.setState({ is_ordered: e.target.checked})
 
   }
-  
+
   onSave = () => {
     const {question_title, question_score, question_type, question_choices, standard_answers, is_ordered } = this.state;
     const { question_id_to_insert_after, question_id } = this.props
@@ -78,8 +78,8 @@ class NullEditor extends Component{
       this.props.showNotification('分值：必须大于0'); return;
     } else if(!question_score || intScore == NaN) {
       this.props.showNotification('分值：不能为空'); return;
-    } 
-    
+    }
+
 
     let isEmpty = false;
     standard_answers.forEach((answers, index) => {
@@ -91,8 +91,8 @@ class NullEditor extends Component{
         answerArray[index].answer_text.push(item)
         if(!item) {
           this.refs[`nullChildEditor${index}`].showError(itemIndex)
-          // this.props.showNotification(`请先输入第${index+1}个填空的第${itemIndex+1}参考答案。`); 
-          this.props.showNotification(`答案：不能为空`); 
+          // this.props.showNotification(`请先输入第${index+1}个填空的第${itemIndex+1}参考答案。`);
+          this.props.showNotification(`答案：不能为空`);
           isEmpty = true;
         }
       })
@@ -122,7 +122,7 @@ class NullEditor extends Component{
     "is_ordered":true
 }
     }*/
-    const Id = this.props.match.params.Id  
+    const Id = this.props.match.params.Id
     if (question_id) {
       const editUrl = this.props.getEditQuestionUrl(question_id);
       axios.put(editUrl, {
@@ -146,7 +146,7 @@ class NullEditor extends Component{
         });
     } else {
       const url = this.props.getAddQuestionUrl();
-      
+
       axios.post(url, {
         exercise_bank_id: Id,
         question_title,
@@ -165,13 +165,13 @@ class NullEditor extends Component{
         .catch(function (error) {
           console.log(error);
         });
-    }  
+    }
   }
   onCancel = () => {
     this.props.onEditorCancel()
   }
   componentDidMount = () => {
-    
+
   }
   on_question_score_change = (e) => {
     this.setState({ question_score: e })
@@ -195,13 +195,13 @@ class NullEditor extends Component{
         this.mdReactObject.toShowMode()
       }
     })
-    
+
   }
-  
+
   onAnswerChange = (index, itemIndex, val) => {
     if (this.state.standard_answers[index]) {
     this.setState(
-        (prevState) => ({ 
+        (prevState) => ({
           standard_answers : update(prevState.standard_answers
             , {[index]: {$splice: [[itemIndex, 1, val]]}}),
         })
@@ -217,6 +217,21 @@ class NullEditor extends Component{
       )
   }
 
+  deleteChildAnswermain=(index, childIndex)=>{
+    let newstandard_answers=this.state.standard_answers
+
+    this.props.confirm({
+      content: `确认要删除这个参考答案吗？`,
+      onOk: () => {
+        newstandard_answers.splice(index,1)
+        this.setState({
+          standard_answers:newstandard_answers
+        })
+
+      }
+    })
+  }
+
   deleteChildAnswer = (index, childIndex) => {
     if(!this.state.standard_answers[index][childIndex]) {
       this.setState(
@@ -258,16 +273,16 @@ class NullEditor extends Component{
     }
     this.mdReactObject = that;
   }
-  
+
   render() {
     let { question_title, question_score, question_type, question_choices, standard_answers
       , is_ordered } = this.state;
     let { question_id, index, exerciseIsPublish,
-    // question_title, 
-    // question_type, 
+    // question_title,
+    // question_type,
     // question_score,
         isNew } = this.props;
-    
+
     // const { getFieldDecorator } = this.props.form;
 
     const isAdmin = this.props.isAdmin()
@@ -302,17 +317,17 @@ class NullEditor extends Component{
                 <span className="color-grey-9 font-12 fl">（客观题，由系统自动评分，允许手动调分，请设置标准答案 ；支持最多5个空，每空得分按照本题的总分平均计算）</span>
             </p>
 
-            <NullMDEditor {...this.props} mdID={`question_${question_id}`} placeholder="请您输入题目" height={155} 
+            <NullMDEditor {...this.props} mdID={`question_${question_id}`} placeholder="请您输入题目" height={155}
               initValue={question_title} onChange={(val) => this.setState({ question_title: val})}
               onPlaceholderChange={this.onPlaceholderChange} showNullButton={exerciseIsPublish ? false : true}
               ref="titleEditor"
             ></NullMDEditor>
-            
+
             <div className="clearfix">
               {
                 standard_answers.map((answers, index) => {
 
-                  return <NullChildEditor 
+                  return <NullChildEditor
                     ref={`nullChildEditor${index}`}
                     {...this.props}
                     toMDMode={this.toMDMode}
@@ -321,6 +336,7 @@ class NullEditor extends Component{
                     onAnswerChange={this.onAnswerChange}
                     addChildAnswer={this.addChildAnswer}
                     deleteChildAnswer={this.deleteChildAnswer}
+                    deleteChildAnswermain={this.deleteChildAnswermain}
                   ></NullChildEditor>
                   // answer.map((item, itemIndex) => {
                   //   return <DMDEditor
@@ -331,7 +347,7 @@ class NullEditor extends Component{
                   // })
                 })
               }
-              
+
             </div>
 
             <div className="clearfix ">
@@ -346,16 +362,16 @@ class NullEditor extends Component{
               <InputNumber step={0.1} precision={1} min={0} max={100} style={{width: 100}} value={question_score} onChange={this.on_question_score_change}
                 disabled={exerciseIsPublish} placeholder="请填写分数"
               ></InputNumber > 分
-              
-              
+
+
               <span className="fr">
                 <ActionBtn style="greyBack" className="middle mr20" onClick={this.onCancel}
                 >取消</ActionBtn>
                 <ActionBtn style="blue" className="middle" onClick={this.onSave}>保存</ActionBtn>
               </span>
-              
+
             </div>
-            
+
         </div>
       )
     }
diff --git a/public/react/src/modules/courses/signin/css/Signinstatistics.css b/public/react/src/modules/courses/signin/css/Signinstatistics.css
index 627458052..060793bc6 100644
--- a/public/react/src/modules/courses/signin/css/Signinstatistics.css
+++ b/public/react/src/modules/courses/signin/css/Signinstatistics.css
@@ -150,6 +150,10 @@
     color:#FF835C;
 }
 
+.color909399{
+    color:#909399;
+}
+
 .color1890FF{
     color:#1890FF;
 }
@@ -185,4 +189,14 @@
 
 .sginboxcolorFF835C .ant-select-arrow{
     color: #FF835C !important;
+}
+
+
+
+.sginboxcolor909399 .ant-select-selection--single{
+    border:1px solid #909399 !important;
+}
+
+.sginboxcolor909399 .ant-select-arrow{
+    color: #909399 !important;
 }
\ No newline at end of file
diff --git a/public/react/src/modules/courses/signin/student/Signedinlist.js b/public/react/src/modules/courses/signin/student/Signedinlist.js
index f9c3459a6..16e4c3865 100644
--- a/public/react/src/modules/courses/signin/student/Signedinlist.js
+++ b/public/react/src/modules/courses/signin/student/Signedinlist.js
@@ -23,12 +23,12 @@ class Signedinlist extends Component {
         {id:undefined,name:"全部状态"},
         {id:"NORMAL",name:"正常签到"},
         {id:"LEAVE",name:"请 假"},
-        {id:"ABSENCE",name:"旷 课"},
+        {id:"ABSENCE",name:this.props.defaultActiveKey ==="2"?"旷 课":"未签到"},
       ],
       newstate:[
         {id:"NORMAL",name:"正常签到"},
         {id:"LEAVE",name:"请 假"},
-        {id:"ABSENCE",name:"旷 课"},
+        {id:"ABSENCE",name:this.props.defaultActiveKey ==="2"?"旷 课":"未签到"},
       ],
       course_members_count:'--',
       attendance_count:'--',
@@ -36,8 +36,6 @@ class Signedinlist extends Component {
   }
 
   componentDidMount() {
-
-
     this.getdatas(this.props&&this.props.switattendance_id,1,[],undefined)
     // this.getpath()
   }
@@ -161,7 +159,6 @@ class Signedinlist extends Component {
   }
   handleChangestate=(value)=>{
     let neval
-
     if(!value){
       neval=undefined
       this.setState({
@@ -214,6 +211,7 @@ class Signedinlist extends Component {
           this.setState({
             member_attendances:newmember_attendances
           })
+          this.props.mygetdatas()
         }
       })
       .catch(function (error) {
@@ -264,14 +262,14 @@ class Signedinlist extends Component {
           <span>
             <Select key={record.index} defaultValue={record.attendance_status}
                     // className={"Signedinlistbox"}
-                    className={record.attendance_status==="NORMAL"?"color26C7C9 Signedinlistbox sginboxcolor26C7C9":record.attendance_status==="LEAVE"?"colorEAAE4E Signedinlistbox sginboxcolorEAAE4E":record.attendance_status==="ABSENCE"?"colorFF835C Signedinlistbox sginboxcolorFF835C":"Signedinlistbox"}
+                    className={record.attendance_status==="NORMAL"?"color26C7C9 Signedinlistbox sginboxcolor26C7C9":record.attendance_status==="LEAVE"?"colorEAAE4E Signedinlistbox sginboxcolorEAAE4E":record.attendance_status==="ABSENCE"?this.props.defaultActiveKey==="2"?"colorFF835C Signedinlistbox sginboxcolorFF835C":"color909399 Signedinlistbox sginboxcolor909399":"Signedinlistbox"}
 
                     style={{ width: 167 }} onChange={(e)=>this.handleChange(e,record.user_id)}>
                   {
                     newstate&&newstate.map((item,key)=>{
                       return(
                         <Option value={item.id} key={key}
-                                className={item.name==="正常签到"?"color26C7C9 sginbox":item.name==="请 假"?"colorEAAE4E sginbox":item.name==="旷 课"?"colorFF835C sginbox":""}>{item.name}</Option>
+                                className={item.name==="正常签到"?"color26C7C9 sginbox":item.name==="请 假"?"colorEAAE4E sginbox":item.name==="旷 课"?"colorFF835C sginbox": item.name ==="未签到"?"color909399 sginbox":""}>{item.name}</Option>
                       )
                     })
                   }