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9月2日作业
Damon的博客
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<iframe>标签的使用：

实例

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>iframe标签的使用</title>
</head>

<body>
    <div style="float: left; margin-right:10px">
        <ul>
            <li><a href="https://www.163.com" target="main">网易</a></li>
            <li><a href="https://www.sina.com" target="main">新浪</a></li>
            <li><a href="https://www.baidu.com" target="main">百度</a></li>
            <li><a href="https://www.jd.com" target="main">京东</a></li>
        </ul>
    </div>
    <iframe src="https://www.taobao.com" frameborder="0" name="main" width="400" height="600" style="float: left"></iframe>

</body>

</html>

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css样式设置的优先级：

实例

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>css样式设置的优先级</title>
    <link rel="stylesheet" href="style1.css">
    <style>
        p {
            color: darkorchid
        }
    </style>
</head>

<body>
    <p>我爱学习 学习使我快乐</p>
    <p>我爱学习 学习使我快乐</p>
    <p style="color: darkorange">我爱学习 学习使我快乐</p>
</body>

</html>

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css的id, class与标签选择器的使用规则

实例

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>css的id, class与标签选择器的使用规则</title>
    <style>
        #aa {
            color: #f00
        }
        
        .yy {
            color: darkturquoise
        }
        
        p {
            color: goldenrod
        }
    </style>
</head>

<body>
    <p id="aa" class="yy">阿萨德噶数据库老大哥</p>


</body>

</html>

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盒模型的五大要素

实例

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>盒模型的五大要素</title>
    <style>
        .box1 {
            background-color: goldenrod;
            border: 2px saddlebrown solid;
            width: 300px;
            height: 500px;
        }
        
        .box2 {
            background-color: skyblue;
            margin: 50px 20px;
            padding: 10px 20px 30px 40px;
            border: 2px dashed #f00;
        }
    </style>
</head>

<body>
    <div class="box1">
        <div class="box2">php中文网原创视频：《天龙八部》公益php培训系列课程汇总！ php中文网《玉女心经》公益***系列课程汇总 令人期待的PHP7.4 正则表达式语法教程（含在线测试工具） 韩天峰：关于PHP程序员技术职业生涯规划 四个优秀php原生开发实战视频教程推荐（必学） PHPConChina 2019 参会感悟</div>
    </div>
</body>

</html>

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