谢言 我们非常感谢使用本书第l版和试用第2版原稿的学生与教师提出许多宝贵的评论和建议。我们还要特别感谢退休教授Thomas M.Scott,他详细阅读了原稿,提供教学方面的反馈意见并整理答案手册。 我们也在此感谢下列评论者为改进本书所作的评论: Pofessor Mary R.Andemn ArizonaStateUniversity Professor Ronald L.Carter University of Texas at Arlington Professor Roy H.Cornely New Jersey Institute of Technology Professor W.T.Easter North Carolina StateUniversity Professor Mahmoud El Nokali UniveDityofPittsburgh Professor B.J.Farbrother Rose-Hulman Institute of Technology Professor Robert D.Hatch Lawrence Technological University Professor Ted Higman University of Minnesota Professor Marian K.Kazimierczuk Wright State University Professor Mohan Krishnan University of Detroit,Meroy Professor Satish M.Mahajan Tennessee TTechnological University Professor David H.Navon Universityof Massachussetts,Amherst Dr.V.Rajaravivarma NorthCarolina A&T State University 当然,不用说我们的夫人Janice Burns和Donna Bond,给予我们的工作极大的支持并热切盼望本书能及时圆满完成和早日出版。