xxxxxxxxxx<html><head><meta charset="utf-8"><title>W3Cschool教程(w3cschool.cn)</title></head><body><h1>我的 Web 页面</h1><p>建议在运算符或者逗号后换行。</p><p id="demo"></p><script>document.getElementById("demo").innerHTML = "Hello W3CSchool.";</script></body></html>