Pilotless flight safety and security are what pilots are concerned about.
A: 正确
B: 错误
A: 正确
B: 错误
举一反三
- 中国大学MOOC: Pilotless flight safety and security are what pilots are concerned about.
- 14. What is the man concerned about? A: The safety of weight-lifting. B: The high membership fee. C: The renewal of his membership. D: The operation of fitness equipment.
- ________ the flight to Beijing will be delayed is ______ I'm especially worried about. A: If ; what B: Whether ; that C: When ; that D: Whether ; what
- While we try to teach our children all about life, our children teach us what life is all about. A: 正确 B: 错误
- What were doctors mainly concerned about in the past?