XX _
_________________________
__________________________ (
1
2
3
4
1 ____________________________________________
2 ____________________________________________
3 ____________________________________________
4 ____________________________________________
5 ______________ ____________________
6 ___________________ _____________
7 _________________________________________
8 _________________________________________
__________________________
______________________,
___________%
______________________ ________________________
_____________
1
2 20
3
1 1