Objective-C语言中类的实例变量如果只可以被本类和其子类访问,需要下列哪个修饰符()
使用Objective-C语言输出“This is a Objective-Cprogram.”正确的是()
What is the key objective of the plan phase? Select exactly 1 answer(s) from the following:()。
The primary objective of a Ro-Ro vessel is to().
New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport.Which switching mode should be configured on the new switches to provide error-free transport to the network? ()
What is an example of a fundamental objective of cargo stowage?()
What is the key objective of the plan phase?()
Objective-C声明一个类所要用到的编译指令是()
Objective-C有私有方法吗?有私有变量吗?()
Objective-C中包含一个自定义的头文件应该使用()