为什么右下方的图片显示不出来，背景图片怎么变成红色

源自：5-4 CSS3背景 multiple backgrounds

<!DOCTYPE html>

<html>

<head>

.demo{

width: 300px;

height: 140px;

border: 1px solid #999;

background-image: url(http://img.mukewang.com/54cf2365000140e600740095.jpg),

url(http://img.mukewang.com/54cf238a0001728d00740095.jpg),

url(http://img.mukewang.com/54cf23b60001fd9700740096.jpg);

background-position: left top, 100px 0, 200px 0;

background-repeat: no-repeat, no-repeat, no-repeat;

margin:0 0 20px 0;

}

.task {

width: 300px;

height: 140px;

border: 1px solid #999;

background:url(http://static.mukewang.com/static/img/logo_index.png) no-repeat left top/200px 70px ;

url(http://static.mukewang.com/static/img/logo_index.png) no-repeat , right bottom/150px 70px;

background-repeat: no-repeat, no-repeat;

//margin:0 0 20px 0;

}

</style>

</head>

<body>

</body>

</html>

提问者：慕工程8044577 2019-01-29 10:29