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							- <!DOCTYPE html>
 
- <html lang="en">
 
- <head>
 
-     <meta charset="UTF-8">
 
-     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
-     <title>Document</title>
 
-     <style>
 
-         .main {
 
-             border: 2px solid #000;
 
-         }
 
-         .one {
 
-             background: #f00;
 
-             float: left;
 
-             width: 200px;
 
-             height: 200px;
 
-             font-size: 30px;
 
-             color: #fff;
 
-         }
 
-         .two {
 
-             background: #0f0;
 
-             float: left;
 
-             width: 200px;
 
-             height: 200px;
 
-             font-size: 30px;
 
-             color: #fff;
 
-         }
 
-         .three {
 
-             background: #00f;
 
-             float: left;
 
-             width: 200px;
 
-             height: 200px;
 
-             font-size: 30px;
 
-             color: #fff;
 
-         }
 
-         img {
 
-             float: left;
 
-         }
 
-     </style>
 
- </head>
 
- <body>
 
-     <!-- <img src="../day1/images/img01.gif" alt="">
 
-     <img src="../day1/images/img01.gif" alt="">
 
-     <img src="../day1/images/img01.gif" alt=""> -->
 
-     <!-- 
 
-         为什么使用浮动:想让元素在一行显示
 
-         float:left/right;
 
-         问题:浮动会导致父元素高度塌陷
 
-         因为浮动会让元素脱离文档流 不占位
 
-      -->
 
-      <div class="main">
 
-         <div class="one">1</div>
 
-         <div class="two">2</div>
 
-         <div class="three">3</div>
 
-         我是一段话
 
-      </div>
 
- </body>
 
- </html>
 
 
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