毕业论文(设计)AcknowledgementsI would like to extend my sincere gratitude to the teachers andfriends who have offered me all kinds of help in accomplishing thisthesis.Especially,Ms.Yang Yingchun,my supervisor,who hasgiven me constructive suggestions,word-for-word scrutiny,andother expert guidance.Without her painstaking instruction,thecompletion of the present thesis would not have been possible.I am equally indebted to all other professors who haveenlightened me with their insightful lectures and instructive advice.My thanks also go to the scholars who have done a lot of researchwork on polite language,and to the authors whose works I havequoted directly and indirectly.I am also grateful to my classmatesand roommates for their psychological support and encouragement.i
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