为什么没有单选框了
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>form中的lable标签</title>
</head>
<body>
<form>
<label for="male">男</label>
<input type="radio" name="gender" id="male" />
<br />
<label for="female">女</label>
<input type="radio" name="gender" id="female" />
<br />
<label for="fmail">天</label>
<label type="radio" name="gender" id="fmail" />
<br />
<label for="email">输入你的邮箱地址</label>
<input type="email" id="email" placeholder="Enter email">
</form>
</body>
</html>
