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<!DOCTYPE html> <html> <body> <h1>JavaScript 数组方法</h1> <p>使用索引号访问数组元素：</p> <p id="demo1"></p> <p id="demo2"></p> <script> var fruits = ["Banana", "Orange", "Apple", "Mango"]; document.getElementById("demo1").innerHTML = fruits; fruits[0] = "Lemon"; document.getElementById("demo2").innerHTML = fruits; </script> </body> </html>