diff --git a/w5/AI协助记录.txt b/w5/AI协助记录.txt
index e69de29..6756125 100644
--- a/w5/AI协助记录.txt
+++ b/w5/AI协助记录.txt
@@ -0,0 +1,3 @@
+1.利用AI复习了如何使用多态，继承和方法重写
+2.做进阶题时，利用AI学习了接口的定义，实现类该怎么写，implements的作用等等
+3.写完代码后利用AI帮我指出代码错误，修改代码并理解错误原因
\ No newline at end of file
diff --git a/w5/USBTest.java b/w5/USBTest.java
new file mode 100644
index 0000000..647c1c3
--- /dev/null
+++ b/w5/USBTest.java
@@ -0,0 +1,59 @@
+package com.example.shape;
+
+interface USB {
+    void open();
+    void close();
+}
+
+class Mouse implements USB {
+    @Override
+    public void open() {
+        System.out.println("鼠标已连接，指示灯亮起");
+    }
+    @Override
+    public void close() {
+        System.out.println("鼠标已断开，指示灯熄灭");
+    }
+    public void click() {
+        System.out.println("鼠标点击了一下");
+    }
+}
+
+class Keyboard implements USB {
+    @Override
+    public void open() {
+        System.out.println("键盘已连接，可正常输入");
+    }
+    @Override
+    public void close() {
+        System.out.println("键盘已断开，无法输入");
+    }
+    public void type() {
+        System.out.println("键盘按下了按键");
+    }
+}
+
+class Computer {
+    public void useUSB(USB usb) {
+        usb.open();
+        if (usb instanceof Mouse) {
+            ((Mouse) usb).click();
+        } else if (usb instanceof Keyboard) {
+            ((Keyboard) usb).type();
+        }
+        usb.close();
+        System.out.println("------------------------");
+    }
+}
+
+public class USBTest {
+    public static void main(String[] args) {
+        Computer computer = new Computer();
+        USB mouse = new Mouse();
+        USB keyboard = new Keyboard();
+        System.out.println("=== 插入鼠标 ===");
+        computer.useUSB(mouse);
+        System.out.println("=== 插入键盘 ===");
+        computer.useUSB(keyboard);
+    }
+}
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diff --git a/w5/进阶题运行截图.png b/w5/进阶题运行截图.png
new file mode 100644
index 0000000..3cf0fe4
Binary files /dev/null and b/w5/进阶题运行截图.png differ