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+
+## 学习内容
+ - 40%-60%：开发所有功能只占20%；剩下用于完善处理可能的需求/麻烦。
+ - 剩下的是一些会议（设计（扯皮），研讨，培训
+
+## 练习题
+![](图片imgs/20251128-练习1.gif)
+```html
+<body>
+    <img style="width: 100px;height: 100px;background-color: green;" id="imgSub">
+
+<div id="question">中国的国球是？</div>
+    <form id="quizForm">
+        <input type="radio" name="answer" value="A" id="optionA">
+        <label for="optionA">A: 篮球</label><br>
+        
+        <input type="radio" name="answer" value="B" id="optionB">
+        <label for="optionB">B: 排球</label><br>
+        
+        <input type="radio" name="answer" value="C" id="optionC">
+        <label for="optionC">C: 乒乓球</label><br>
+        
+        <input type="radio" name="answer" value="D" id="optionD">
+        <label for="optionD">D: 羽毛球</label><br>
+    </form>
+    <div id="result" style="margin-top: 20px;"></div>
+    <div id="selected" style="margin-top: 10px;"></div>
+    
+    <script>
+        {
+            const imgSub = document.getElementById('imgSub');
+            imgSub.addEventListener("mouseenter", function (event) {
+                //添加边框
+                this.style.border = "3px solid red";
+            });
+            imgSub.addEventListener("mouseleave", function (event) {
+                //去除边框
+                this.style.border = "none";
+            });
+        }
+        {
+            
+            //通过键盘上ABCD选择真确答案。中国的国球是A篮球，B排球，C乒乓球，D羽毛球
+            
+            document.addEventListener('keydown', function(event) {
+            const key = event.key.toUpperCase();
+            const result = document.getElementById('result');
+            const selectedDiv = document.getElementById('selected');
+
+            // 对应按键选择单选框
+            if (['A', 'B', 'C', 'D'].includes(key)) {
+                document.getElementById(`option${key}`).checked = true;
+                selectedDiv.innerHTML = `你选择了: ${key}`;
+                
+                if (key === 'C') {
+                    result.innerHTML = '<span style="color: green">✅ 回答正确！中国的国球是乒乓球</span>';
+                } else {
+                    result.innerHTML = `<span style="color: red">❌ 回答错误！你选了${key}，正确答案是 C: 乒乓球</span>`;
+                }
+            }
+        });
+        }
+    </script>
+
+</body>
+```
+
+![](图片imgs/20251011-练习.png)
+```html
+
+```
\ No newline at end of file
