120 180 110 1 A BB C BD 2 A B BC D 3 A B C D 4 A198871 B B199811 C1991629 B D199071 5 A B C D 6 B A B B BC D 7 A B B BB C B D 8 A B B C D 9 A511031 BB5101031 C611031 BD4201110 10 A B B B C B B D “√”“×”115 1 2 3 4 5 6 7 8 9 10 11