diff --git a/public/react/src/common/showdown-katex/asciimath-to-tex.js b/public/react/src/common/showdown-katex/asciimath-to-tex.js
index 120c619df..dddf11778 100644
--- a/public/react/src/common/showdown-katex/asciimath-to-tex.js
+++ b/public/react/src/common/showdown-katex/asciimath-to-tex.js
@@ -2000,7 +2000,7 @@ function parseSexpr(str) {
         // abs, floor, ceil
         return [
           `{\\left${symbol.rewriteleftright[0]}${result[0]}\\right${
-            symbol.rewriteleftright[1]
+          symbol.rewriteleftright[1]
           }}`,
           result[1],
         ];
diff --git a/public/react/src/modules/page/MainContent.js b/public/react/src/modules/page/MainContent.js
index 01af57572..d755ceb87 100644
--- a/public/react/src/modules/page/MainContent.js
+++ b/public/react/src/modules/page/MainContent.js
@@ -1,5 +1,4 @@
 import React, { Component } from 'react';
-
 import ActionView from './main/ActionView';
 
 import LeftViewContainer from './main/LeftViewContainer';
@@ -11,7 +10,8 @@ import CodeEvaluateView from './main/CodeEvaluateView';
 import ChooseRepositoryView from './main/ChooseRepositoryView';
 import ChooseEvaluateView from './main/ChooseEvaluateView'
 
-import { Button } from 'antd'
+import { CircularProgress } from 'material-ui/Progress';
+import Button from 'material-ui/Button';
 import VNCContainer from './VNCContainer'
 import { connect } from 'react-redux';
 
@@ -161,9 +161,11 @@ class MainContent extends Component {
 															?
 															<React.Fragment>
 																<div style={{ display: (codeLoading ? 'block' : 'none'), textAlign: 'center' }}>
+																	<CircularProgress size={40} thickness={3}
+																		style={{ marginLeft: 'auto', marginRight: 'auto', marginTop: '18%' }} />
 																	<span style={{ color: '#ddd', display: 'block' }}>正在加载中，请稍后...</span>
 																</div>
-																<div style={{ display: (codeLoading ? 'none' : 'block'), height: '100%' }}>
+																<div style={{ display: (codeLoading ? 'none' : 'block') }}>
 																	<CodeRepositoryViewContainer {...this.props} ></CodeRepositoryViewContainer>
 																</div>
 															</React.Fragment>
@@ -178,7 +180,7 @@ class MainContent extends Component {
 												<div className="split-panel--second -layout -vertical -flex -relative -bg-black -flex-basic60"
 													id="games_valuation_contents" style={{ height: '258px', minHeight: '85px' }}>
 													{/* 测试结果、评测信息区域 */}
-													{loading ? <p>正在加载中...</p>
+													{loading ? <CircularProgress size={40} thickness={3} style={{ marginLeft: 'auto', marginRight: 'auto', marginTop: '10%', display: 'block' }} />
 														:
 														st === 0
 															? <CodeEvaluateView output_sets={output_sets} latest_output={latest_output}
@@ -189,70 +191,15 @@ class MainContent extends Component {
 											</div>
 										</div>
 									</div>
-								}
-							></VNCContainer>
-								<div id="actionView" className="-layout-h -center -bg-grey-90 -grey-20 -bg-darkblack">
-									<ActionView  {...this.props}
-										onRunCodeTest={onRunCodeTest}
-									></ActionView>
 								</div>
-						</CodeRepositoryViewContainer>
-						:
-						<React.Fragment>
-
-							<div className="-layout-v -flex">
-								<div className="-flex -relative">
-									<div className="split-panel -fit -vertical" id="games_repository_valuation">
-										<div className="-layout -stretch -fit -vertical centerH">
-											<div className="-layout -vertical -flex -relative -flex-basic70 -bg-weightblack"
-												id="games_repository_contents" style={games_repository_contents_style} >
-
-												{/* 选择题或编程题 */}
-												{/* readRepoTimeout 如果读取代码超时，显示重新加载按钮，重新拉取代码 */}
-												{
-													st === 0
-														?
-														<React.Fragment>
-															<div style={{ display: (codeLoading ? 'block' : 'none'), textAlign: 'center' }}>
-																<CircularProgress size={40} thickness={3}
-																	style={{ marginLeft: 'auto', marginRight: 'auto', marginTop: '18%' }} />
-																<span style={{ color: '#ddd', display: 'block' }}>正在加载中，请稍后...</span>
-															</div>
-															<div style={{ display: (codeLoading ? 'none' : 'block') }}>
-																<CodeRepositoryViewContainer {...this.props} ></CodeRepositoryViewContainer>
-															</div>
-														</React.Fragment>
-														: <ChooseRepositoryView ref="chooseQ" chooseQfun={(ref) => this.chooseQfun(ref)}{...this.props}></ChooseRepositoryView>
-												}
 
-												{/* */}
-											</div>
-											<div className="h-center" style={{ top: '438px' }}>
-												{/*<div className="-changebg -bg-weightblack" id="-bg-change-color"></div>*/}
-											</div>
-											<div className="split-panel--second -layout -vertical -flex -relative -bg-black -flex-basic60"
-												id="games_valuation_contents" style={{ height: '258px', minHeight: '85px' }}>
-												{/* 测试结果、评测信息区域 */}
-												{loading ? <CircularProgress size={40} thickness={3} style={{ marginLeft: 'auto', marginRight: 'auto', marginTop: '10%', display: 'block' }} />
-													:
-													st === 0
-														? <CodeEvaluateView output_sets={output_sets} latest_output={latest_output}
-															record={record} onTestSetHeaderClick={onTestSetHeaderClick} {...this.props}></CodeEvaluateView>
-														: <ChooseEvaluateView {...this.props}></ChooseEvaluateView>
-												}
-											</div>
-										</div>
-									</div>
+								<div id="actionView"
+									style={{ position: 'absolute', width: '100%', bottom: '0', height: '51px' }}
+									className="-layout-h -center -bg-grey-90 -grey-20 -bg-darkblack">
+									<ActionView  {...this.props} onRunCodeTest={onRunCodeTest}></ActionView>
 								</div>
-							</div>
-
-							<div id="actionView"
-								style={{ position: 'absolute', width: '100%', bottom: '0', height: '51px' }}
-								className="-layout-h -center -bg-grey-90 -grey-20 -bg-darkblack">
-								<ActionView  {...this.props} onRunCodeTest={onRunCodeTest}></ActionView>
-							</div>
 
-						</React.Fragment>
+							</React.Fragment>
 						}
 					</div>
 				</div>