- hello world ``` hello world! ``` ![image.png](https://dn-simplecloud.shiyanlou.com/courses/uid1370512-20200430-1588204639883) 将页面添加到收藏夹时为其提供标题 <meta>标记始终位于<head>元素内，并且它们提供有关 HTML 文档的元数据。 ``` <!DOCTYPE> <html> <head> <title> HTML Reference</tile> <meta name="keywords" content="HTML,CSS,JavaScript"/> <meta name="description" content="Free web tutorials for HTML and CSS"/> <meta name="author" content ="WangTaoTao"/> <meta http-equiv="refresh" content="30"/> <meta name="viewport" content="width=device-width,initial-scale=1.0"/> </head> <body> hello world! </body> </html> ``` 实验图片 ![image.png](https://dn-simplecloud.shiyanlou.com/courses/uid1370512-20200430-1588205419669) 在index.html文件中实验<header>标签代码如下：（定义在<body></body>内部） ``` <!DOCTYPE html> <html> <head> <title> HTML Reference hello world!

Most important heading here

Less important heading here

Some additional information here

``` 运行结果 ![image.png](https://dn-simplecloud.shiyanlou.com/courses/uid1370512-20200502-1588374214235) ``` ``` 运行结果： ![image.png](https://dn-simplecloud.shiyanlou.com/courses/uid1370512-20200502-1588375948144) ```

Google Chrome

Goole Chrome is a web browser developed by Google, released in 2008,Chrome is the world's most popular web browser today!

Microsoft Edge

Microsoft Edge is a web brower develop by Microsft, released in 2015, Microsft Edge replaced Internet Explorer.

``` 运行结果： ![image.png](https://dn-simplecloud.shiyanlou.com/courses/uid1370512-20200502-1588376370239)

这里添加标题

这里是换行解释

```

WWF

The world Wide Fund for Nature(wwf) is ...

``` 运行结果： ![image.png](https://dn-simplecloud.shiyanlou.com/courses/uid1370512-20200502-1588376587626)

“Web开发基础”实验报告