CSS specifies the selector (11), css specifies the selector

CSS specifies the selector (11), css specifies the selector
1. Specify Selector

Sometimes you want to control the object style of an element within a certain range. Then you can combine the element with the Class or Id selector to use it.

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
It is very useful to specify an element whose definition style is limited to the class or id attribute. Its control precision on the element is between the tag selector and the id or class selector, is a very practical selector type
For example, how to control the news body in the following module
<Div> 

Css
div p.news{    font-size:18px;    color:#FF00FF;    }
Or
p.news{    font-size:18px;    color:#00FFFF;    }