参考答案

（一）单选题

1B2A3C4B5A6A7D8B9A10B

11D12A13B14B15C16C17C18B19B20D

21A22B23A24D25D26D27B28A29A30C

31D32A33C34D35A36B37B38C39D40C

41B42C43D44A45C46C47B48C49B50C

51A52C53A54D55B56D57A58C59A60C

61B62A63B64C65C66C67B68C69C70D

71D72B73D74D75A76D77D78D79D80D