老师检查下，顺便解答下注释

来源：3-5 编程练习

罗杰明

2020-01-03 16:31:10

    <html>
    <head>
        <meta charset="UTF-8">
        <title>网站名称</title>
        <style>
            .div1{
                width:500px;
                height:300px;
                background-color:skyblue;
                padding-top:100px;
                box-sizing:border-box;
            }
            .div2{
                width:250px;
                height:150px;
                background-color:yellow;
                margin-left:120px;
                margin-top:-15px;
            }
        </style>
    </head>
    <body>
        <div class="div1">
            <div class="div2"></div>
        </div>
    </body>
    </html>

/**

    怎样计算黄色能在蓝色的中间的数值

    为什么有些同学上面有这些代码，分别什么意思( <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">)
*/