参考答案
1.B 2.D 3.A 4.B 5.C 6.C7.A8.D9.B10.D
11.E12.D13.B14.C15.A16.C17.A18.D19.E20.A
21.D22.C23.C24.C25.C 26.B27.D28.D29.E30.C
31.E32.C33.D34.E35.E 36.B37.B38.A39.E40.A
41.B42.B43.D44.C45.D46.A47.C48.B49.C50.C
51.E52.B53.A54.B55.E 56.E57.D58.A59.C60.E