激活网络连接new0的命令是( )。
A: ifup new0
B: ifdown new0
C: nmcli connection up new0
D: nmcli connection new0
A: ifup new0
B: ifdown new0
C: nmcli connection up new0
D: nmcli connection new0
举一反三
- (7-1)定义了Animal类、Cat类和Dog类,则()代码段是正确的。classAnimal{};classCatextendsAnimal{}classDogextendsAnimal{} A: Dog[] a = new Dog[5];a[0] = new Cat(); B: Animal a = new Animal[5];a[0] = new Animal(); C: Dog[]a = new Dog[5];a[0] = new Animal(); D: Cat[]a = new Cat[5];a[0] = new Cat();
- var a=new Array( new Array( 9,0,3,6,5) , new Array( 2,9,0,6 ) ); 则a[0][3]值为
- 关于二维数组的创建,以下做法正确的是: (1)int a[][] =new int[4][5] (2)int a[][] =new int[4][]; a[0]=new int[10];a[1]=new int[20]; (3)int a[][]; a=new int[3][]; a[0]=new int[3]; a[1]={1,2};a[2]={1,2,3};
- It’s essential in new operations. A: investing B: to invest C: 0 D: 0
- 定义了Animal类、Cat类和Dog类,则()代码段是正确的。classAnimal{};classCatextendsAnimal{ }classDogextendsAnimal{ } A: Dog[ ] ds=new Dog[5];ds[0]=new Animal(); B: Animal[ ] as=new Animal[5];as[0]=new Dog();