参考答案
1.D2.A3.B4.C5.A6.A7.B8.A9.C10.B
11.B12.C13.C14.A15.B16.B17.D18.D19.D20.D
21.D22.B23.D24.E25.B26.A27.B28.D29.E30.C
31.B32.D33.A34.C35.C36.C37.D38.B39.E40.E
41.E42.D43.A44.B45.D46.B47.C48.E49.C50.E
51.A52.A53.E54.B55.A56.E57.B58A59.D60.C
61.C62.A63.B64.D65.A66.B67.B68.C