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<!DOCTYPE html> <html> <body> <h2>JavaScript 数组</h2> <p>数组索引是从零开始的，这意味着第一项是 [0]。</p> <p id="demo"></p> <script> var cars = ["Saab","Volvo","BMW"]; document.getElementById("demo").innerHTML = cars[0]; </script> </body> </html>