無法通過點擊引導排

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css" rel="stylesheet" /> 
 
<div class="row"> 
 
    <div class="col-md-9"> 
 
    <div class="btn-group pull-left"> 
 
     <a class="btn btn-default" href="/servers"> 
 
First 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=4"> 
 
Prev 
 
</a> 
 
     <a class="btn btn-default" href="/servers"> 
 
1 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=2"> 
 
2 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=3"> 
 
3 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=4"> 
 
4 
 
</a> 
 
     <a class="btn btn-default disabled"> 
 
5 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=6"> 
 
6 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=7"> 
 
7 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=8"> 
 
8 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=9"> 
 
9 
 
</a> 
 
     <a class="btn btn-default disabled"> 
 
… 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=6"> 
 
Next 
 
</a> 
 
     <a class="btn btn-default" href="/servers?page=12"> 
 
Last 
 
</a> 
 
    </div> 
 
    </div> 
 
</div>

來源似乎是上述BTN-組。他們在排班和col-md-9。

當它們是全尺寸時，它們是可點擊的。

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