MD 语法

**B**

*I*

~~3~~

++U++


---
> 

- 1
1. 1
- [ ] 2
- [x] 3
 
[link](http://note.youdao.com/)

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```

header 1 | header 2
---|---
row 1 col 1 | row 1 col 2
row 2 col 1 | row 2 col 2