50 30 % 1 2 3 4 O 5 6 7 8 9 10 11 1 A A B C 2 C A B C 3 (B ) A B C 4 C A B C 5 C A B C 6 ? A A B C 7 B A B C 8 C A B C 9 A A B C 10 P B A B C 20% 2012 50 30% 1 2 O 3 3 (3) 4 5 5- - - 4 6 4 7 8 9 10 1 C A B C 2 A B C 3 B A B C 4 mf (C) A B C 5 A A B C 6 C A B C 7 ( A ) A B C 8 C A B C 9 C A B C 10 B A B C 11 A A B C 20 2012 50 30 1 2 2 3 # 4 5 6 7 8 9 10 11 1= G G 12 13 14 15 P 16 1 1 3 5 B A B C 2 C A B C 3 A A B C 4 C A B C 5 A A B C 6 B A B C 7 A A B C 8 f C A B C 9 C A B C 10 A A B C 11 C A