diff --git a/app-dm/src/pages/ListPages/Training/Operation3.css b/app-dm/src/pages/ListPages/Training/Operation3.css
new file mode 100644
index 0000000..e69de29
diff --git a/app-dm/src/pages/ListPages/Training/Operation3.jsx b/app-dm/src/pages/ListPages/Training/Operation3.jsx
new file mode 100644
index 0000000..e531d3d
--- /dev/null
+++ b/app-dm/src/pages/ListPages/Training/Operation3.jsx
@@ -0,0 +1,95 @@
+import './Operation2.css'
+import { Terminal } from "@xterm/xterm";
+import "@xterm/xterm/css/xterm.css"
+import  React,{ MouseEvent, useEffect, useRef, useState } from "react";
+import { useParams } from 'react-router';
+import { Link } from 'react-router-dom';
+import arrowleft from '../img/arrowleft.jpg'
+import arrowright from '../img/arrowright.jpg'
+import bottom from '../img/bottom.jpg'
+import top from '../img/top.jpg'
+
+function Operation3() {
+    const { operateID } = useParams();
+
+    //倒计时
+    // const { OperationId } = useParams();
+    const [test_data, setTestData] = useState('');
+    const [countdown, setCountdown] = useState(0);
+
+    // 倒计时初始化
+    useEffect(() => {
+    const examDuration = 60 * 60; // 假设考试时长为1小时
+    setCountdown(examDuration);
+    }, []);
+
+    // 倒计时更新
+    useEffect(() => {
+        let interval = setInterval(() => {
+            if (countdown > 0) {
+                setCountdown(countdown - 1);
+            } else {
+                clearInterval(interval);
+                alert('考试时间到！');
+            }
+        }, 1000);
+        return () => clearInterval(interval);
+    }, [countdown]);
+
+     // 转换秒数为时分秒格式
+      const formatTime = (seconds) => {
+        const hours = Math.floor(seconds / 3600);
+        const minutes = Math.floor((seconds % 3600) / 60);
+        const secs = seconds % 60;
+        return `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`;
+      };
+
+    // 下拉菜单
+    const [isSubjectDropdownOpen, setIsSubjectDropdownOpen] = useState(false);
+
+  return (
+    <div>
+        <div className='nav-operation2'>
+            {/* 导航 */}
+            {/* <h1>{OperationId}</h1> */}
+            <p>剩余时间：{formatTime(countdown)}</p>
+        </div>
+        <div className='body-operation2'>
+            <div className='nav-left-operation2'>
+                {/* 左边导航 */}
+                <p>题目</p>
+                <ul className='nav-left-ul2'>
+                    <Link to='/operation1/实训一：数据库的安装' style={{color:'#000',textDecoration:'none'}}>
+                        <li className='subject-dropdown2' onClick={() => setIsSubjectDropdownOpen(!isSubjectDropdownOpen)}>
+                            主观题
+                            {isSubjectDropdownOpen ? <span className='list-img2'><img src={bottom} alt="" width='20px' height='20px'/></span> : <span><img src={top} alt="" width='20px' height='20px'/></span>}
+                            {isSubjectDropdownOpen && (
+                                <ul className='dropdown-menu2'>
+                                    <li>判断题</li>
+                                    <li>选择题</li>
+                                    <li>简答题</li>
+                                    {/* 子菜单项 */}
+                                </ul>
+                            )}
+                        </li>   
+                    </Link>         
+                    <li style={{ marginTop: isSubjectDropdownOpen ? '186px' : '0' }}>实训题</li>
+                </ul>
+            </div>
+            <div className='body-right2'>
+                第三页（实训题:）的右边页面
+            </div>
+            <Link className='btn-back2' to={`/operation1/${operateID}`} style={{color:'#000',textDecoration:'none'}}>
+                <p>上一页</p>
+                <img src={arrowleft} alt="" width='40px' height='40px' />
+            </Link>
+            <Link className='btn-out2' to='/train' style={{color:'#000',textDecoration:'none'}}>
+                <img src={arrowright} alt="" width='40px' height='40px' />
+                <p>完成</p>
+            </Link>
+        </div>
+    </div>
+  )
+}
+
+export default Operation3;
\ No newline at end of file
diff --git a/app-dm/src/router/index.jsx b/app-dm/src/router/index.jsx
index 019d193..1a281f0 100755
--- a/app-dm/src/router/index.jsx
+++ b/app-dm/src/router/index.jsx
@@ -16,6 +16,7 @@ import AnalysePage from '../pages/ListPages/Analyse/AnalysePages';
 import Exam from '../pages/ListPages/Subject/Exam';
 import Operation1 from '../pages/ListPages/Training/Operation1';
 import Operation2 from '../pages/ListPages/Training/Operation2';
+import Operation3 from '../pages/ListPages/Training/Operation3';
 
 // 教师页面
 import TeacherPage from '../TeacherPages/TeacherPage';
@@ -23,8 +24,8 @@ import ClassID from '../TeacherPages/classlistpages/classId';
 import ManageTest from '../TeacherPages/TestManage/ManageTest';
 import SendTest from '../TeacherPages/TestManage/SendTest';
 import Marking from '../TeacherPages/MarkingPages/Marking';
-import SendTrain from '../TeacherPages/Trainmanage/SendTrain';
-import TrainManage from '../TeacherPages/Trainmanage/Trainmanage';
+import SendTrain from '../TeacherPages/TrainManage/SendTrain';
+import TrainManage from '../TeacherPages/TrainManage/Trainmanage';
 import StudentLink from '../TeacherPages/MarkingPages/StudentLink';
 import List_pods from '../TeacherPages/list_pods/list_pods';
 
@@ -75,8 +76,9 @@ function App() {
           <Route path="exam/:examId" element={<Exam />} />{/* 练习-考试页面 */}
           <Route path='/teacher/sendtest' element={<SendTest />}/> {/* 考试管理-发布试卷 */}
           <Route path='/teacher/SendTrain' element={<SendTrain/>}/> {/*实训管理-发布实训*/}
-          <Route path='operation1/:operateID' element={<Operation1/>}/> {/* 实训页面1 */}
-          <Route path='operation2/:operateID' element={<Operation2/>}/> {/* 实训页面2 */}
+          <Route path='operation1/:operateID' element={<Operation1/>}/> {/* 实训页面1:理论 */}
+          <Route path='operation2/:operateID' element={<Operation2/>}/> {/* 实训页面2:数据库 */}
+          <Route path='operation3/:operateID' element={<Operation3/>}/> {/* 实训页面3:web前端 */}
           <Route path='teacher/list_pods' element={<List_pods/>}/>
           <Route path='/refresh' element={<Refresh/>}/>