前端-02-day

1：plate
2：bento
3：#fancy
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：bento~pikcle
14：plate > apple
15：orange:first-child
16：:only-child
17：.small:last-child
18：plate:nth-child(3)
19：:nth-last-child(4)
20：apple:first-of-type
21：plate:nth-of-type(even)
22：plate:nth-of-type(2n+3)
23：apple:only-of-type
24：.small:nth-child(even)
25：bento:empty
26：apple:not(.small)