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<style type="text/css">
body{background-color:yellow}
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<meta charset="utf-8">
<title>我是小菜鸟</title>
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<div id="xiaoniao" style="background-color:#FFA500;clear:both;text-align:center;">
<h1 style="background-color:red;text-align:center;">小菜鸟成为大神第一步</h1>
<h2>学会元素的重要性</h2>
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<div style="background-color:#EEEEEE;height:350px;width:400px;float:right;"">
<P style="font-family:楷体;margin-left:60px;font-size:10px;color:blue;">元素是我们写好动态页面的基础，我们要把元素学的很好，才能变成大神呦</P>
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<img loading="psc" src="C:\Users\HY\Desktop\照片" width="100px"height="200px">
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<a href="https://www.zcool.com.cn/?p=3#tab_anchor"target="blank" rel="noopener noreferrer">要当一个好的前端要有一定的审美，点我提升审美哦</a>
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<div style="background-color:green;width=600px;height=800px;">
<h3 style="text-align:center;">前端好</h3>
<P style="text-align:center;">前端前端顶呱呱<br>我们大家都爱他<br>努力学习敲代码<br>早日变成好娃娃<br>
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<a href="https://www.runoob.com/html/html-links.html#tips"target="blank" >111</a>
<p>其实你是个<del><i>胖子</i></del><ins><strong>瘦子</strong></ins>.</p>
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<form>
账号：<input type="text"><br>
</form>
<form>
密码：<input type="password" name="password">
<input type="radio" name="sex"value="male">你好 <input type="radio" name="sex"value="female">再见
<br>
<input type="checkbox"name="vehicle" value="bike">i have a bike <br>
<input type="checkbox"name="cehicle" value="car">i have a car<br>
</form>
<form name="input"action="html_form_action.php"method="get">
username:<input type="text" name="user">
<input type="submit" value="提交">
</form>
<form action="demo-form.php"method="get">
<input list="browsers" name="browser">
<datalist id="browsers">
<option value="gaga">
<option value="jiji">
<option value="mimi">
</datalist>
<form>
<button type="button" onclick="alert('你好，世界')">look me!</button>
</form>
<iframe src="demo_iframe.htm" name="iframe_a" width="400" height="400" frameborder="5"></iframe>
<p><a href="http://www.baidu.com"target="iframe_a"rel="noopener">你好呀</a></p>
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