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我按照視頻里講的做出來成這個樣子了。。。

左右兩邊是灰色的，我想做成純白色的，還有我設置的高度是紅線到頂，可是圖片還是都顯示出來了，請問這是什么情況。。。代碼是從bootstrap上復制下來的，如下：

<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
  <!-- Indicators -->
  <ol class="carousel-indicators">
    <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
    <li data-target="#carousel-example-generic" data-slide-to="1"></li>
  </ol>

  <!-- Wrapper for slides -->
  <div class="carousel-inner" role="listbox">
    <div class="item active">
      <img src="mac.jpg" alt="mac">
      <div class="carousel-caption">
        
      </div>
    </div>
    <div class="item">
      <img src="chrome.jpg" alt="chrome">
      <div class="carousel-caption">
       
      </div>
    </div>
    
  </div>

  <!-- Controls -->
  <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
    <span class="glyphicon glyphicon-chevron-left"></span>
    <span class="sr-only">Previous</span>
  </a>
  <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
    <span class="glyphicon glyphicon-chevron-right"></span>
    <span class="sr-only">Next</span>
  </a>
</div>