600471
1C、2A、3B、4B、5C、6D、7C、8C、9C、10D
1:C 2:B 3:C 4:C 5:C 6:B 7:B 8:A 9:A 10:B 11:C 12:A 13:B 14:D 15:C 16:D 17:C 18:C 19:B AC? 20: D