The following is my thesis. Thank you.

Express gratitude/gratitude

In the process of writing this paper, I thank my tutor XXX for her guidance and supervision, and for her understanding and tolerance. Without teacher X's help, there would be no paper today. The process of learning is hard, but it is also happy. Thank my head teacher, Mr. XXX, for everything he has done for our class in these four years. His selfless dedication is very touching, and I would like to express my heartfelt thanks to him again. During the four-year semester, I made friends in life and study, which made me gain the greatest wealth in my life. Here, I also want to express my heartfelt thanks to them.

Thanks to my parents, without their efforts, there would be no me today. At this moment, I extend my highest respect to you!

This paper refers to a large number of documents, here, pay tribute to the predecessors of various academic circles!