I dz
ͳ
1
0
0
0
0
0
0
0
2  () ()
0
0
0
0
0
0
0
3  . .
0
0
0
0
0
0
0
4
0
0
0
0
0
0
0
5  . .
0
0
0
0
0
0
0
6
0
0
0
0
0
0
0
123123