单项选择题答案
C| 2:B| 3:B| 4:A| 5:C| 6:D| 7:B| 8:D| 9:D| 10:C| 11:C| 12:D| 13:D| 14:B| 15:B| 16:D| 17:D| 18:A| 19:B| 20:B| 21:C| 22:D| 23:C| 24:B| 25:D| 26:A| 27:B| 28:B| 29:A| 30:C| 31:B| 32:A| 33:A| 34:C| 35:A| 36:C| 37:C| 38:D| 39:D| 40:C| 41:D| 42:C| 43:C| 44:D| 45:B| 46:D| 47:D| 48:C| 49:D| 50:B|’ c# G; o7 Y( I8 p! d’ t7 ~