HTML（HyperText Markup Language）是用于創(chuàng)建網頁的標準標記語言，它定義了網頁的結構和內容的呈現(xiàn)方式。HTML 文檔的基本結構包括以下幾個部分：
1. ``：這是文檔類型聲明，告訴瀏覽器文檔使用的 HTML 版本。通常使用 HTML5 的文檔類型聲明，即 ``。
2. ``：這是 HTML 文檔的根元素，所有其他 HTML 元素都包含在 `` 元素中。
3. `
`：位于 `` 元素內部，包含了關于文檔的元數(shù)據(jù)，如標題、樣式表、腳本等。常見的元素包括 `
`、`<meta>`、`<link>`、`
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