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老师批语：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>4.jquery的基本语法</title>
</head>
<body>
<script type="text/javascript" src="../js/jquery-3.3.1.js"></script>
<script type="text/javascript">
$('h2 span').css('color','red')
$('p+p').html('终于找到你了,开工吧')
//
$('<img src="../images/zly.jpg" width="150">')
$('<img src="../images/zly.jpg" width="150">').insertAfter('h2').css('border-radius','50%')
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
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