参考答案
1.E 2.B3.E4.A5.C6.D7.E8.C9.D10.C
11.C12.E13.B14.D15.A16.C17.D18.B19.C20.B
21.E22.B23.B24.C25.A26.C27.C28.B29.A30.E
31.C32.C33.C34.B35.B36.B37.D38.A39.C40.B
41.C42.B43.A44.A45.C46.D47.C48.D49.C50.B
51.D52.B53.D54.E55.B56.D57.C58.B59.D 60.A
61.B62.D63.B64.A65.C66.C67.C68.C