当移动媒体查询使用其他图像时，是否会在移动设备上加载CSS背景图像？

body{
  height: 100vh;
  background-image: url('https://static.pexels.com/photos/96918/pexels-photo-96918.jpeg');
  background-size: cover;
}


@media screen and (max-width: 748px){
  body{
    background-image: url('https://static.pexels.com/photos/27714/pexels-photo-27714.jpg');
  }
}

<div class="demo"></div>