参考答案

一、单项选择题

1.A2.B3.C4.A5.B6.B7.D8.B9.D10.A

11.D12.A13.A14.B15.C16.A17.A18.D19.B20.D

21.D22.D23.C24.A25.C26.D27.D28.B29.C30.D

31.B32.B33.C34.B35.D36.C37.B38.B39.D40.B

41.A42.A43.C44.A45.C46.C47.D48.A49.C50.C

51.B52.B53.A54.B55.A56.C57.B58.D59.A60.C