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dompratice
/
xyz (1).html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>第一题</title>
</head>

<body>
  <div id="jaf"></div>
</body>
<script>
  var jaf=document.getElementById("jaf")
  for (var i = 1; i < 50; i++) {
    var div = document.createElement("div")
    if (i % 2 == 1) {
      var txt = document.createTextNode("hello world")
    } else {
      var txt = document.createTextNode("你好世界！")
    }
    div.appendChild(txt)
    jaf.append(div)
  }
</script>

</html>