中国大学MOOC: Jet lag often involves transnational travel by air.
错
举一反三
- 中国大学MOOC: For blue-collar workers, their work often involves in ___________
- 中国大学MOOC: _______ is not the necessary travel document when you go abroad by air.
- 中国大学MOOC: You can take the life vest away if you travel by air.
- 中国大学MOOC: Airport VIP service refers to _______ and ________ mainly given to the governmental leaders or CIPs to travel by air.
- Travel in the air.
内容
- 0
The __________ of jet travel has made the world seem smaller.
- 1
I usually travel to China ______ air.
- 2
中国大学MOOC: Jet engine and __ are two main engine type.
- 3
(travel)（）by train is much cheaper than by air.
- 4
The air inside a house or office building often has higher concentrations of contaminants ____ heavily polluted outside air. A: than does B: more C: as some that are D: like of