全文总字数：2395字

1. 毕业设计（论文）的内容、要求、设计方案、规划等

翻转课堂的定义界定要清楚，写此论文的目的要交代清楚。

数据要充分，分析的内容要有理有据 ，要求论文论点明确，论据充分，有一定的新意和价值；层次分明，论述清晰

2. 参考文献（不低于12篇）

Ashley A. A Handbook of Commercial Correspondence［M］. Oxford: OUP，1992.Channel，J. Vague Language［M］. Oxford： Oxford University Press，2000.Chen Wenjing. A Pragmatic Study on Vague Language in Business English Correspondence of Claim ［D］. Xi'an International Studies University，2014.Cheng Xuemei. A Study of Vague Language in English Business Correspondence from the Perspective of Adaptation Theory [D] . Dongbei University of Finance and Economics, 2010.Ding Yi. Vague Language in Business Correspondence and the Intentions of Its User[D] . Jilin University, 2009.Ge Sheng. A Pragmatic Study on the Vague Language in Business Correspondence [D] . Southeast University, 2006.Jiang Yuchao. Application of Vague Language in Business English Correspondence Based on Adaptation Theory [D] . Nanchang Hangkong University, 2012.Luan Lan. Pragmatic Analysis of Vague Language in English Business Correspondence [D] . Harbin Engineering University, 2006.Qi Xingang. Pragmatic Analysis of Vague Expression in English Business Correspondence [D] .Central China Normal University, 2009.Verschueren，J. Understanding Pragmatics［M］. Beijing: Foreign Language Teaching and Research Press，2000.Yang Jiajia. A Pragmatic Analysis of Vague Language in English Business Correspondence [D] . Central South University, 2009.Yu Xudong. The Employment of Vague Language in Business Correspondence [D]. Harbin Institute of Technology, 2008.Zhang Lin. A Pragmatic Study of Vague Language in English Business Correspondence [D] . Jilin University, 2015.Zhang Lina. A Study of Vague Language in English Business Correspondence [D] . Dalian Maritime University, 2007.Zhou Jing. A Pragmatic Analysis of Vague Language in English Business Correspondence [D] . Shanghai International Studies University,2013.白海瑜，惠春琳. 模糊语的语用功能及其语用失误功能［J］. 西安外国语学院学报, 2004.(11-13)蔡红女. 模糊语言在外贸英语函电中的语用功能 [J] . 吉林教育, 2009.(67-68)高东军. 模糊语言在商务英语信函中的语用功能［J］. 河南科技大学学报（社会科学版），2009.(67-69)郭磊. 模糊语在外贸英文函电中的功能与应用研究 ［J］. 黑河学院学报， 2013.(83-86)林莹. 论外贸函电中的模糊语及其合作原则 ［J］. 校园英语， 2015.(193)罗雪林，朱艳宁，廖东芳，资云南. 模糊语视角下的外贸英语函电教学研究 ［J］. 校园英语，2016.(33-34)梅桂能. 当代外贸信函英语模糊语应用原则［J］. 产业与科技论坛，2009.彭娟. 论外贸函电中的模糊语言及其语用研究 ［J］. 校园英语，2014.(99)彭娟. 外贸函电中模糊语的实践教学与应用探讨 [J] . 海外英语, 2016.(1-2)王琪. 语用模糊在英文商务信函中的应用与研究 ［D］.黑龙江大学,2009.