Css+div+html (i)--html summary

first, the definition

HTML (Hyper Text Markup Language), markup language.

second, the main content:

HTML elements fall into three categories: block-level tags, inline tags, and variable labels. The difference is:

Block-level elements: A newline is displayed by default.

Inline elements: are displayed by default on a single line.

mutable element: Determines whether it is a block-level element or an inline element, depending on the context.

HTML documents and HTML elements are tagged with HTML tags. The HTML element defines the entire HTML document. What do you mean?

As an example:

An HTML document is defined with a text label:

<! DOCTYPE html>

The table is labeled by <table>. 
<span style= "FONT-FAMILY:KAITI_GB2312;FONT-SIZE:18PX;" >

Form instances:
<ol start= "Ten" ><li>hehe<li>haha<li>huihui<li  value= ">weiwei<li>dada" </ol><ol type= "a" ><li>hehe<li>haha<li>huihui<li>weiwei<li>dada</ol ><ul type= "disc" ><li>hehe<li>haha<li>huihui<li>weiwei<li>dada</ul> <dl><dt>hehe<dt>haha<dt>huihui<dt>weiwei<dt>dada</dl>

This is the above ol is ordered form, UL is unordered form, DL is the definition form. 
Iii. Summary
Read a lot of HTML documents and books, the content of the talk is no different.
   the knowledge in HTML, make a summary diagram, incorporate it into your own knowledge network, Will not be disorderly, will not forget, the management of knowledge lies in: summary, thinking, contact.