為什么我在bootstrp中文網上下的3.3.7版本顯示不出后面的圖標？
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>demo</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
</style>
</head>
<body>
<form role="form">
? <div class="form-group has-success has-feedback">
? ? <label class="control-label" for="inputSuccess1">成功狀態(tài)</label>
? ? <input type="text" class="form-control" id="inputSuccess1" placeholder="成功狀態(tài)" >
? ? <span class="glyphicon glyphicon-ok form-control-feedback"></span>
? </div>
? <div class="form-group has-warning has-feedback">
? ? <label class="control-label" for="inputWarning1">警告狀態(tài)</label>
? ? <input type="text" class="form-control" id="inputWarning1" placeholder="警告狀態(tài)">
? ? <span class="glyphicon glyphicon-warning-sign form-control-feedback"></span>
? </div>
? <div class="form-group has-error has-feedback">
? ? <label class="control-label" for="inputError1">錯誤狀態(tài)</label>
? ? <input type="text" class="form-control" id="inputError1" placeholder="錯誤狀態(tài)">
? ? <span class="glyphicon glyphicon-remove form-control-feedback"></span>??
? </div>
</form>
</body>
</html>
2020-01-02
<head>
<meta charset="utf-8">
<title>demo</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
</style> //這行多余了，導致html出錯了吧
</head>
2020-01-02