Such symbols we often use in mathematics are Greek letters.
举一反三
- In invitation letters, what should we use if the addressee is unknown?
- We can use mathematical symbols in taking notes. A: 正确 B: 错误
- 1. What categories can letters be divided into?A．Personal Letters B. Social Letters C. Notes D. Business Letters. A: A．Personal Letters B: B. Social Letters C: C. Notes D: D. Business Letters.
- Generally speaking, letters can be classified into formal letters and informal letters based on the formality of letters.
- 10. Generally speaking, there are two types of letters: business letters and personal letters.