背景圖沒(méi)有辦法完全顯示
.b_background {
??? width: 100%;
??? height: 100%;
??? background-image: url("http://img1.sycdn.imooc.com//55ade06f00015a0d14410901.png");
??? background-size: 100% 100%;
??? position: absolute;
}
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2019-07-17
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