max={10}

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>

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 &&

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

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;
 }