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<!DOCTYPE html> <html> <body> <p>单击按钮提取第三和第四个元素，使用负数。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var fruits = ["香蕉", "橙子", "柠檬", "苹果", "芒果"]; var myBest = fruits.slice(-3, -1); document.getElementById("demo").innerHTML = myBest; } </script> </body> </html>