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