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<!DOCTYPE html> <html> <body> <p id="demo1">这是一个示例段落。</p> <p id="demo2">这是一个示例段落。</p> <button type="button" onclick="changeLetters()">设置字母间距</button> <button type="button" onclick="changeWords()">设置字间距</button> <script> function changeLetters() { document.getElementById("demo1").style.letterSpacing = "15px"; } function changeWords() { document.getElementById("demo2").style.wordSpacing = "15px"; } </script> </body> </html>