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<!DOCTYPE html> <html> <script src="https://cdn.staticfile.net/angular.js/1.6.9/angular.min.js"></script> <style> .sky { color: white; background-color: lightblue; padding: 20px; font-family: "Courier New"; } .tomato { background-color: coral; padding: 40px; font-family: Verdana; } </style> <body ng-app=""> <p>选择一个类：</p> <select ng-model="home"> <option value="sky">天空</option> <option value="tomato">番茄</option> </select> <div ng-class="home"> <h1>欢迎回家！</h1> <p>我喜欢这里！</p> </div> </body> </html>