2、12郑重声明本人的毕业论文是在指导教师薛梅的指导下独立撰写完成的。如有剽窃、抄袭、造假等违反学术道德、学术规范和侵权的行为,本人愿意承担由此产生的各种后果,直至法律责任,并愿意通过网络接受公众的监督。特此郑重声明。 毕业论文作者:年月日AcknowledgementsI am glad to express my gratitude. First of all, I would like toextendmymostsinceregratitudetomyteacherXueMei,fo
3、rherconstantencouragementandguidance.Shehaswalkedmethroughallthestagesofthewritingofthisthesis.Inthisperiodshehasgivenmemuchadvicesandusefulsuggestionsonmythesis.Ithankherforgenerouslysharingherknowledgeandtime,forbeingpatientwithmyquestions.The research in this
4、 article would not have been possible without her help. Iamalsothankfultootherprofessors,whohavetaughtmeandenlightenedmewiththeirinstructivelectures.What’smore,Iamalsothankfultomyclassmates,especiallymyroommateswhohaveofferedmuchhelp.Andtheyhaveprovidedmewithref