选择器

1、plate 标签选择器
2、bento 标签选择器
3、#fancy #id选择器
4、plate apple
5、#fancy pickle
6、.small
7、bento .small, plate .small
8、bento orange
9、plate,bento,plate
10、*
11、plate *
12、plate +apple
13、pickle~pickle
14、plate>apple
15、plate :first-child
16、plate :only-child
17、.small:last-child
18、plate:nth-child(3)
19、bento:nth-last-child(4)
20、apple:first-of-type
21、plate:nth-of-type(even)
22、plate:nth-of-type(2n+3)
23、plate apple:only-of-type
24、.small:last-of-type
25、bento:empty
26、apple:not(.small)