設置了浮動的元素，仍然處于標準文檔流中，會對相鄰的元素產生影響，相鄰元素特指緊鄰后面的元素，老師的這句話好像值得商榷啊，設置了浮動的元素之前的行內元素好像也會收影響
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<style type="text/css">
.box1{background-color: red; height: 100px;float: left;}
.box2{background-color: yellow;height: 100px;}
</style>
</head>
<body>
<p>asdfgasdfasdf</p>
<span>assdgfhsdfgh</span>
<div class="box1">box1</div>
<div class="box2">box2</div>
<p>asdfgasdfasdf</p>
</body>
</html>
2015-08-31
設置了浮動的元素，會脫離文檔流