词汇与结构 The _____of autopilots to airliners with more than twenty seats is generally made mandatory by international aviation regulations.
举一反三
- 词汇与结构The _____of autopilots to airliners with more than twenty seats is generally made mandatory by international aviation regulations. A: fitting B: filter C: fit D: fitment
- How many hours can international students work during school breaks? A: Twenty hours B: More than twenty hours. C: Thirty hours. D: Not mentioned
- Enterprises should bear social responsibility. As companies have made mandatory regulations, entrepreneurs should fulfill these obligations.
- 2. 我认识他已有20年了。 A: I have known him for more twenty years. B: I have know him for more than twenty years. C: I have known him for more than twenty years.
- The old man seems ______here for more than twenty years.