下列哪个不是iOS主要的层次()
A: Core OS
B: Core Services
C: Cocoa Touch
D: HEAD
A: Core OS
B: Core Services
C: Cocoa Touch
D: HEAD
举一反三
- iOS框架层次大体分为四个层次，其中包括Core OS层、Core Services层、Media层、Cocoa Touch层。
- 陀螺仪和加速计的使用通过哪个框架实现（ ）。 A: Core Data B: Core Image C: Core Motion D: Core Location
- 下列哪个不是中国人开发的手机系统（） A: 火狐OS B: 阿里云OS C: windows-phone D: IOS
- Which of these services facilitates the function of the value chain but is not considered a core element of the supply chain?（）
- is the cash generated from the _____of the business.( ) A: core investing B: borrowing C: core operations D: core financing