CSS图像和<img/>元素会被加载两次吗？

Question

  

可能重复：
  Will browser download image twice if it's used in both an image's src as well as a div's background-image?

我有这个标记：

<style>
  #bg {
    background: url(sprite.php);
  }
</style>
<div id="bg"></div>
<img src="sprite.php" />

浏览器会加载sprite.php两次，还是只会发出一次请求？