Are two 'teams' stronger than one? This 'rotation' of judges means that Christina Aguilera and Cee Lo Green will return alongside Adam Levine and Blake Shelton for season 5 in the fall -- while Usher and Shakira will take season 6 in the spring of 2014.
A rule or rule set is a statement that tells browsers how to render particular elements on an HTML page. A rule set consists of a selector followed by a declaration block. The selector selects the elements on an HTML page that are affected by the rule set.
Sets. A set is a collection of things. For example, the items you wear is a set: these would include shoes, socks, hat, shirt, pants, and so on. You write sets inside curly brackets like this: {socks, shoes, pants, watches, shirts, ...}.