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清除浮動1-使用:after 虛擬元素，1-
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<meta name="Author" content="胡超">
<title>super胡</title>
<style>
.news {
background-color: gray;
border: solid 1px black;
}
.news img {
float: left;
}
.news p {
float: right;
}
.clearfix:after{
content: ".";
display:block;
height:0px; /*一、該方法中必須為需要清除浮動元素的偽對象中設定 height:0，否則該元素會比實際高出若干像素；*/
clear: both;
visibility: hidden;
}
.clearfix {
/* 觸發 hasLayout */
zoom: 1;
}
</style>
</head>
<body>
<div class="news clearfix">
<img src="7v/1318240446520.jpg" />
<p>some text</p>
</div>
</body>
</html>
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