中国大学MOOC: Generally, airlines have strict restrictions on the refund and endorsement of economy class.
举一反三
- Generally, airlines have strict restrictions on the refund and endorsement of economy class. A: 正确 B: 错误
- All flights have economy class, business class, and first class.
- 中国大学MOOC: 1.What is the main difference between first class and economy class?
- Flight seats are usually divided into three classes: first class, business class and economy class.
- 中国大学MOOC: The allowance for free baggage in economy class is 35kg.