标签和其属性构成了<1>元素

HTML元素是网页中最基本的组成部分,任何一个网页都是由不同的HTML元素组成的,而这些元素则是由HTML标签和属性组成的。

HTML标签是由一对尖括号(< >)所含括的字符,比如 、、

等等,这些标签用来描述网页的结构。HTML标签之间可以相互嵌套,形成一种类似于树形结构的层级关系。

HTML属性则是用来描述HTML标签的特性,其组成格式为属性名=属性值,比如 中,src就是img标签的属性名,而"image.jpg"则是它的属性值。HTML属性可以用来改变标签的行为、外观以及其他方面的特性。

下面我们来看一个具体的例子:

```

示例网页

欢迎来到示例网页!

这是一段示例文本,包含了加粗斜体等效果。

这是一个二级标题

  • 列表项1
  • 列表项2
  • 列表项3

示例图片

```

在这个例子中,我们用了多个HTML标签和属性来构建一个简单的网页。其中,为文档类型声明,告诉浏览器这是一个HTML5文档。

标签则是整个网页的根元素,内部包含了和两个子元素。

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