div:after,ul:after,dl:after{content:".";display:block;clear:
div:after,ul:after,dl:after{content:".";display:block;clear:
.cl:after{content:".";display:block;height:0;clear:both;visi
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It will be clear the day after tomorrow.clear刬线题问
.clear{clear:both;height:0; overflow:hidden;} ul,li{display:
after which after that