.ul li img{width:100%;height:100%;}
.ul li:nth-child(1){animation-dalay:0s;-moz-animation-delay:0s;}
.ul li:nth-child(2){animation-dalay:3s;-moz-animation-delay:3s;}
改成
ul li img{width:100%;height:100%;}
ul li:nth-child(1){animation-dalay:0s;-moz-animation-delay:0s;}
ul li:nth-child(2){animation-dalay:3s;-moz-animation-delay:3s;}
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