2、1 & 1 = 1， 1 | 1 = 1， 1 ^ 1 = 0

3、1 & 0 = 0， 1 | 0 = 1， 1 ^ 0 = 1

4、0 & 1 = 0， 0 | 1 = 1， 0 ^ 1 = 1

5、0 & 0 = 0， 0 | 0 = 0， 0 ^ 0 = 0