diff --git a/app/templates/shared/main.css b/app/templates/shared/main.css
index 884f6fa37..befe7e40a 100644
--- a/app/templates/shared/main.css
+++ b/app/templates/shared/main.css
@@ -83,6 +83,7 @@ a.edu-txt-w80,.edu-txt-w80{ width:80px; display: inline-block;text-align: center
 .font-20{ font-size: 20px!important;}
 .font-22{ font-size: 22px!important;}
 .font-24{ font-size: 24px!important;}
+.font-25{ font-size: 25px!important;}
 .font-26{ font-size: 26px!important;}
 .font-28{ font-size: 28px!important;}
 .font-30{ font-size: 30px!important;}
diff --git a/public/react/public/css/css_min_all.css b/public/react/public/css/css_min_all.css
index 9bbf43e9b..4a4c7b49f 100755
--- a/public/react/public/css/css_min_all.css
+++ b/public/react/public/css/css_min_all.css
@@ -103,6 +103,7 @@ a:hover.link-color-grey03{color:#3498db!important;}
 .font-18{ font-size: 18px!important;}
 .font-20{ font-size: 20px!important;}
 .font-22{ font-size: 22px!important;}
+.font-25{ font-size: 25px!important;}
 .font-24{ font-size: 24px!important;}
 .font-28{ font-size: 28px!important;}
 .font-30{ font-size: 30px!important;}
diff --git a/public/react/public/css/edu-common.css b/public/react/public/css/edu-common.css
index 6817312ad..cd8d65e94 100755
--- a/public/react/public/css/edu-common.css
+++ b/public/react/public/css/edu-common.css
@@ -103,6 +103,7 @@ a:hover.link-color-grey03{color:#3498db!important;}
 .font-18{ font-size: 18px!important;}
 .font-20{ font-size: 20px!important;}
 .font-22{ font-size: 22px!important;}
+.font-25{ font-size: 25px!important;}
 .font-24{ font-size: 24px!important;}
 .font-28{ font-size: 28px!important;}
 .font-30{ font-size: 30px!important;}
diff --git a/public/react/src/modules/courses/busyWork/commonWork.js b/public/react/src/modules/courses/busyWork/commonWork.js
index 584965039..20343c870 100644
--- a/public/react/src/modules/courses/busyWork/commonWork.js
+++ b/public/react/src/modules/courses/busyWork/commonWork.js
@@ -76,6 +76,7 @@ class commonWork extends Component{
   }
   componentDidUpdate(prevProps, prevState) {
     if (prevProps.match.path != this.props.match.path) {
+      this.clearSelection()
       this._getList()
     }
   }
diff --git a/public/react/src/modules/courses/poll/PollNew.js b/public/react/src/modules/courses/poll/PollNew.js
index a36180e9e..16db651b0 100644
--- a/public/react/src/modules/courses/poll/PollNew.js
+++ b/public/react/src/modules/courses/poll/PollNew.js
@@ -1032,7 +1032,7 @@ class PollNew extends Component {
 				if(object.question.max_choices){
 					if(object.question.max_choices>0){
 						if (object.question.max_choices < object.question.min_choices) {
-							this.props.showNotification(`可选的最大限制不能小于最小限制`);
+							this.props.showNotification(`可选：最小和最大限制须同时为数值或者“--"`);
 							return;
 						}
 					}
@@ -1252,7 +1252,7 @@ class PollNew extends Component {
 				if(object.question.max_choices){
 					if(object.question.max_choices>0){
 						if (object.question.max_choices < object.question.min_choices) {
-							this.props.showNotification(`可选的最大限制不能小于最小限制`);
+							this.props.showNotification(`可选：最小和最大限制须同时为数值或者“--"`);
 							return;
 						}
 					}
@@ -1573,7 +1573,7 @@ class PollNew extends Component {
 				if(object.question.max_choices){
 					if(object.question.max_choices>0){
 						if (object.question.max_choices < object.question.min_choices) {
-							this.props.showNotification(`可选的最大限制不能小于最小限制`);
+							this.props.showNotification(`可选：最小和最大限制须同时为数值或者“--"`);
 							return;
 						}
 					}
@@ -1784,7 +1784,7 @@ class PollNew extends Component {
 				if(object.question.max_choices){
 					if(object.question.max_choices>0){
 						if (object.question.max_choices < object.question.min_choices) {
-							this.props.showNotification(`可选的最大限制不能小于最小限制`);
+							this.props.showNotification(`可选：最小和最大限制须同时为数值或者“--"`);
 							return;
 						}
 					}
diff --git a/public/react/src/modules/courses/poll/PollNewQuestbank.js b/public/react/src/modules/courses/poll/PollNewQuestbank.js
index 3e9be6a74..b8f1f9831 100644
--- a/public/react/src/modules/courses/poll/PollNewQuestbank.js
+++ b/public/react/src/modules/courses/poll/PollNewQuestbank.js
@@ -3218,7 +3218,7 @@ class PollNewQuestbank extends Component {
 																														 onClick={() => this.Deleteentrys(arrid, indext, true)}><Tooltip
 																														title="删除"
 																														placement={"bottom"}><i
-																														className="ml1 iconfont icon-htmal5icon19 font-22 color-grey-c"></i></Tooltip></a>
+																														className="ml1 iconfont icon-htmal5icon19 font-25 color-grey-c"></i></Tooltip></a>
 																								</span>
 																								: ""}
 																					</p>) : (<p className="df mb20">
@@ -3256,7 +3256,7 @@ class PollNewQuestbank extends Component {
 																										<a className="lineh-40 mr10"
 																											 onClick={() => this.Deleteentrys(arrid, indext, false)}><Tooltip
 																											title="删除" placement={"bottom"}><i
-																											className="iconfont icon-htmal5icon19 font-22 color-grey-c"></i></Tooltip></a>
+																											className="iconfont icon-htmal5icon19 font-25 color-grey-c"></i></Tooltip></a>
 																								 :""
 																								}
 																								{
@@ -3265,12 +3265,12 @@ class PollNewQuestbank extends Component {
 																										<a className="lineh-40"
 																											 onClick={() => this.Ewoption(itemo.question.id, itemo)}><Tooltip
 																											title="新增" placement={"bottom"}><i
-																											className="color-green font-18 iconfont icon-roundaddfill"></i></Tooltip></a>
+																											className="color-green font-22 iconfont icon-roundaddfill"></i></Tooltip></a>
 																										: itemo.question.answers.length - 1 === indext ?
 																										<a className="lineh-40"
 																											 onClick={() => this.Ewoption(itemo.question.id, itemo)}><Tooltip
 																											title="新增" placement={"bottom"}><i
-																											className="color-green font-18 iconfont icon-roundaddfill"></i></Tooltip></a>
+																											className="color-green font-22 iconfont icon-roundaddfill"></i></Tooltip></a>
 																										: <a className="lineh-40  yw18"
 																										></a>
 																								}
@@ -3280,7 +3280,7 @@ class PollNewQuestbank extends Component {
 																									<a className="lineh-40" id="bianjibianji1"
 																										 onClick={() => this.Ewoption(itemo.question.id, itemo)}><Tooltip
 																										title="新增" placement={"bottom"}><i
-																										className="color-green font-18 iconfont icon-roundaddfill"></i></Tooltip></a>
+																										className="color-green font-22 iconfont icon-roundaddfill"></i></Tooltip></a>
 																									:"")
 																							// : "")
 																						: "":""}
@@ -3549,7 +3549,7 @@ class PollNewQuestbank extends Component {
 																											 onClick={() => this.Deleteentrys(arrid, indext, true)}><Tooltip
 																											title="删除"
 																											placement={"bottom"}><i
-																											className="ml1 iconfont icon-htmal5icon19 font-22 color-grey-c"></i></Tooltip></a>
+																											className="ml1 iconfont icon-htmal5icon19 font-25 color-grey-c"></i></Tooltip></a>
 																							</span>
 																							: ""}
 																					</p>) : (<p className="df mb20">
@@ -3583,7 +3583,7 @@ class PollNewQuestbank extends Component {
 																												<a className="lineh-40 mr10"
 																													 onClick={() => this.Deleteentrys(arrid, indext, false)}><Tooltip
 																													title="删除" placement={"bottom"}><i
-																													className="iconfont icon-htmal5icon19 font-22 color-grey-c"></i></Tooltip></a>
+																													className="iconfont icon-htmal5icon19 font-25 color-grey-c"></i></Tooltip></a>
 																										:""
 																										}
 																								{
@@ -3591,12 +3591,12 @@ class PollNewQuestbank extends Component {
 																										<a className="lineh-40"
 																											 onClick={() => this.Ewoption(itemo.question.id, itemo)}><Tooltip
 																											title="新增" placement={"bottom"}><i
-																											className="color-green font-18 iconfont icon-roundaddfill"></i></Tooltip></a>
+																											className="color-green font-22 iconfont icon-roundaddfill"></i></Tooltip></a>
 																										: itemo.question.answers.length - 1 === indext ?
 																										<a className="lineh-40"
 																											 onClick={() => this.Ewoption(itemo.question.id, itemo)}><Tooltip
 																											title="新增" placement={"bottom"}><i
-																											className="color-green font-18 iconfont icon-roundaddfill"></i></Tooltip></a>
+																											className="color-green font-22 iconfont icon-roundaddfill"></i></Tooltip></a>
 																										:
 																										<a className="lineh-40  yw18"
 																										></a>
@@ -3607,7 +3607,7 @@ class PollNewQuestbank extends Component {
 																									<a className="lineh-40 " id="bianjibianji2"
 																										 onClick={() => this.Ewoption(itemo.question.id, itemo)}><Tooltip
 																										title="新增" placement={"bottom"}><i
-																										className="color-green font-18 iconfont icon-roundaddfill"></i></Tooltip></a>
+																										className="color-green font-22 iconfont icon-roundaddfill"></i></Tooltip></a>
 																									:"")
 																						 // : "")
 																						: "":""}
@@ -3885,7 +3885,7 @@ class PollNewQuestbank extends Component {
 																						 onClick={() => this.Deleteentrys(arrid, indext, true)}><Tooltip
 																						title="删除"
 																						placement={"bottom"}><i
-																						className="ml1 iconfont icon-htmal5icon19 font-22 color-grey-c"></i></Tooltip></a>
+																						className="ml1 iconfont icon-htmal5icon19 font-25 color-grey-c"></i></Tooltip></a>
 																		</span>
 																			: ""}
 																	</p>) : (<p className="df mb20">
@@ -3927,7 +3927,7 @@ class PollNewQuestbank extends Component {
 																						<a className="lineh-40 mr10"
 																							 onClick={() => this.Deleteentrys(arrid, indext, false)}><Tooltip
 																							title="删除" placement={"bottom"}><i
-																							className="iconfont icon-htmal5icon19 font-22 color-grey-c "></i></Tooltip></a>
+																							className="iconfont icon-htmal5icon19 font-25 color-grey-c "></i></Tooltip></a>
 																						:""
 																				}
 
@@ -3938,14 +3938,14 @@ class PollNewQuestbank extends Component {
 																							 onClick={() => this.Ewoption(itemo.question.id, itemo)}><Tooltip
 																							title="新增"
 																							placement={"bottom"}><i
-																							className="color-green font-18 iconfont icon-roundaddfill"></i></Tooltip></a>
+																							className="color-green font-22 iconfont icon-roundaddfill"></i></Tooltip></a>
 																						:
 																						itemo.question.answers.length - 1 === indext ?
 																							<a className="lineh-40"
 																								 onClick={() => this.Ewoption(itemo.question.id, itemo)}><Tooltip
 																								title="新增"
 																								placement={"bottom"}><i
-																								className="color-green font-18 iconfont icon-roundaddfill"></i></Tooltip></a>
+																								className="color-green font-22 iconfont icon-roundaddfill"></i></Tooltip></a>
 																							:
 
 																							<a className="lineh-40 yw18"
@@ -3958,7 +3958,7 @@ class PollNewQuestbank extends Component {
 																						 onClick={() => this.Ewoption(itemo.question.id, itemo)}><Tooltip
 																						title="新增"
 																						placement={"bottom"}><i
-																						className="color-green font-18 iconfont icon-roundaddfill"></i></Tooltip></a>
+																						className="color-green font-22 iconfont icon-roundaddfill"></i></Tooltip></a>
 																			:"")
 																		: "":""}
 																</p>)}
diff --git a/public/react/src/modules/paths/ShixunPathCard.js b/public/react/src/modules/paths/ShixunPathCard.js
index e384049a5..e55cd7b33 100644
--- a/public/react/src/modules/paths/ShixunPathCard.js
+++ b/public/react/src/modules/paths/ShixunPathCard.js
@@ -1,5 +1,5 @@
 import React, { Component } from 'react';
-import {getImageUrl} from 'educoder';
+import { getImageUrl , setImagesUrl } from 'educoder';
 import { BrowserRouter as Router, Route, Link } from "react-router-dom";
 import { Tooltip } from 'antd';
 import axios from 'axios';
@@ -44,7 +44,7 @@ class ShixunPathCard extends Component{
 
                       <Link to={"/paths/"+item.id} className="squareImg" >
 												{/*target="_blank"*/}
-                        <img alt="详情图片" src={getImageUrl("/"+item.image_url)}/>
+                        <img alt="详情图片" src={setImagesUrl(item.image_url)}/>
                       </Link>
                       <div className="mt20" style={{marginLeft:"1px"}}>
                         <p className="task-hide mb10">
diff --git a/public/stylesheets/css/edu-common.css b/public/stylesheets/css/edu-common.css
index ad1d2598c..4e9fcbffd 100644
--- a/public/stylesheets/css/edu-common.css
+++ b/public/stylesheets/css/edu-common.css
@@ -108,6 +108,7 @@ a:hover.link-color-grey03{color:#3498db!important;}
 .font-18{ font-size: 18px!important;}
 .font-20{ font-size: 20px!important;}
 .font-22{ font-size: 22px!important;}
+.font-25{ font-size: 25px!important;}
 .font-24{ font-size: 24px!important;}
 .font-28{ font-size: 28px!important;}
 .font-30{ font-size: 30px!important;}
diff --git a/public/stylesheets/educoder/edu-main.css b/public/stylesheets/educoder/edu-main.css
index 68305cc5b..4c596bad2 100644
--- a/public/stylesheets/educoder/edu-main.css
+++ b/public/stylesheets/educoder/edu-main.css
@@ -82,6 +82,7 @@ a.edu-txt-w80,.edu-txt-w80{ width:80px; display: inline-block;text-align: center
 .font-18{ font-size: 18px!important;}
 .font-20{ font-size: 20px!important;}
 .font-22{ font-size: 22px!important;}
+.font-25{ font-size: 25px!important;}
 .font-24{ font-size: 24px!important;}
 .font-26{ font-size: 26px!important;}
 .font-28{ font-size: 28px!important;}