答案:
1.D; 2.C; 3.C; 4.D; 5.C; 6.B;
7.B; 8.C; 9.B; 10.C; 11.B; 12.A;
13.C; 14.B; 15.D; 16.B; 17.D; 18.D;
19.B; 20.B; 21.C; 22.D; 23.C; 24.C;
25.C; 26.C; 27.C; 28.B; 29.B; 30.C;
31.B; 32.B; 33.A; 34.C; 35.D; 36.B;
37.A; 38.B; 39.B; 40.C; 41.D; 42.C;
43.B; 44.C; 45.D; 46.B; 47.B; 48.B;
49.C; 50.C; 51.A; 52.B; 53.D; 54.C;
55.D; 56.A; 57.B; 58.C; 59.B; 60.A;
61.C; 62.B; 63.C; 64.B; 65.D; 66.A;
67.A; 68.C; 69.C; 70.B。