#### 带标签的滑块
使用 `marks` 属性标注分段式滑块,使用 `value` / `defaultValue` 指定滑块位置。当 `included=false` 时,表明不同标记间为并列关系。当 `step=null` 时,Slider 的可选值仅有 `marks` 标出来的部分。
#### Graduated slider
Using `marks` property to mark a graduated slider, use `value` or `defaultValue` to specify the position of thumb.
When `included` is false, means that different thumbs are coordinative.
when `step` is null, users can only slide the thumbs onto marks.
```html
included=true
included=false
marks & step
step=null
```