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.
- Most of the airlines have the allowance of ______ for economy class passengers. A: 40 kg B: 30 kg C: 20 kg D: 10 kg
- 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.