参考答案
1.D2.B3.C4.B5.B
6.D7.C8.D9.B10.A
11.D12.D13.A14.D15.A
16.C17.C18.A19.D20.C
21.C22.C23.A24.B25.B
26.D27.C28.A29.C30.C
31.C32.A33.C34.C35.C
36.A37.D38.C39.A40.C
41.B42.B43.D44.D45.B
46.C47.A48.C49.C50.B
51.A52.A53.B54.D55.B
56.A57.A58.A59.D60.A
61.D62.B63.D64.A65.D
66.C67.C68.A69.A70.A
71.D