参考答案
1.B2.D3.B4.D5.E6.D7.E8.A9.D10.B11.E12.C13.D14.E15.E16.B
17.C18.C19.B20.C21.E22.D23.C24.C25.C26.D27.C28.A29.C30.C31.D32.E
33.D34.B35.D36.A37.B38.D39.C40.D41.E42.C43.B44.C45.E46.A47.B48.E
49.D50.D51.E52.D53.C54.E55.B56.C57.A58.B59.C60.D61.C62.E63.D64.B
65.B66.A67.D68.A69.C70.A71.A
