Dear sir or madam,这里的sir和madam为什么不用复数?

Dear sir or madam,这里的sir和madam为什么不用复数? 翻译Dear Sir or Madam中文怎么说? 英语书信开头dear sir or madam,为什么不是dear madam or sir 英语投诉信（严重）.开头用什么称呼?Dear Sir or Madam是不是有点不恰当 英文邀请函中,Dear sir/madam是不对吗?非得用Dear Madam/sir才是国际惯例? 称呼是用dear madam or sir 还是用dear sir or madam对如题,按说应是女士优先,madam在前,可我在很多地方见到大家写dear sir or madam,请问这种写法对吗?哪种更好呢? 请问这句英语语法有错误吗Dear Sir or Madam,Dear Sir or Madam,I am writing this letter to express my dissatisfaction with a night club which just has opened near my house. 未知对方是男女,英文信开头应如何写称谓请给出英文.Dear MR or MS还是Dear Sir or Madam 英文邀请函中,Dear sir/madam是不对吗 Dear Sir or Madam ,I have a little brother .He's Tony .My brother comes into my room all the tim给他提建议 急 英文询问信 帮忙检查一下有没有语法错误 Dear madam or sir:Thank you for your time to read my lett 英语改错题,Dear sir or madam,...英语改错题,Dear sir or madam,I have learned from an advertisement what your company is in need for a secretary.I'd like you consider me for the position.My name is li min.I am twenty three years old.I'm studi 英语翻译：Dear Sir or Madam：We look forward to receiving your response at an early date.Dear Sir or Madam：This is in regards to your order for 5,000widgets and our sales confirmation No. 341. We would like to remind you that the delivery dat 英语短文改错 Dear Sir or Madam,I'm Lihua.When I am rea英语短文改错 Dear Sir or Madam,I'm Lihua.When I am reading the advertisement,I was great impressed by the job.I want to do something for the old.Therefore,I recommend me to you with he 英语短文改错 Dear Sir or Madam,I'm Lihua.When I am reading the advertisement,I was grea...英语短文改错 Dear Sir or Madam,I'm Lihua.When I am reading the advertisement,I was great impressed by the job.I want to do something for the old.The Dear Sir / Madam,I have seen your advertisement for a teacher in the magazine Guangzhou Education. No,Sir .yEs,Madam 1.Write a letter to theSunday Mail and express your opinion.Dear Sir or Madam,I think /believe that__________.I agree/disagree that ________________.I think it is fair/unfair for children to__________________________________.I think childrenshould/sh