In a business letter, we often use _________ to indicate the particular addressee.
举一反三
- In a business letter, we often use _________ to indicate the particular addressee. A: reference number B: attention line C: subject line D: postscript
- In invitation letters, what should we use if the addressee is unknown?
- A patent is used to indicate all of a business's right to make, use and sell its products.
- For letter of invitation, we should use the structure of a/an ____. A: informal letter B: formal letter C: personal letter
- Such symbols we often use in mathematics are Greek letters.