作业

1plate
2bento
3#fancy
4plate apple
5#fancy pickle
6.small
7bento .small,plate .small
8bento orange
9plate,bento,plate
10*
11plate *
12plate +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)not