第十九节盒子真实尺寸

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>盒子的真实尺寸</title>
 6 
 7     <style type="text/css">
 8 
 9         .box1,.box2,.box3{
10             width: 50px;
11             height: 50px;
12             background-color: gold;
13         }
14 
15         .box2,.box3{
16             border:50px solid black;
17         }
18 
19         .box3{
20             padding:50px;
21         }
22         
23     </style>
24 
25 </head>
26 <body>
27     <div class="box1">1</div>
28     <br />
29     <div class="box2">2</div>
30     <br />
31     <div class="box3">3</div>
32 </body>
33 </html>

第十九节 盒子真实尺寸

第十九节盒子真实尺寸