try_w3examples_172 在线代码实例

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<!DOCTYPE html>
<html>
<head>
    <title>W3.CSS(w3cschool.cn)</title>
    <meta name="viewport" content="width=device-width, initial-scale=1" charset="UTF-8">
    <link rel="stylesheet" href="https://7npmedia.w3cschool.cn/w3.css">
</head>
<body>
<form class="w3-container w3-card-4">
    <h2>单选按钮</h2>
    <p>
        <input class="w3-radio" type="radio" name="gender" value="male" checked>
        <label>男</label></p>
    <p>
        <input class="w3-radio" type="radio" name="gender" value="female">
        <label>女</label></p>
    <p>
        <input class="w3-radio" type="radio" name="gender" value="" disabled>
        <label>未知 (已禁用)</label></p>
</form>
</body>
</html>
 
 
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运行结果
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