E类中System.out.println的输出结果是__________、________________。interface Com{int add(int a,int b);}abstract class A{abstract int add(int a,int b);}class B extends A implements Com{public int add(int a,int b){return a+b;}}public class E{public static void main(String args[ ]){B b=new B();Com com=b;System.out.println(com.add(12,6));A a=b;System.out.println(a.add(10,5));}}

阅读程序题(给出【代码】注释标注的代码的输出结果)interface Com {int add( int a, int b);}abstract class People {abstract int add( int a, int b);}class Student extends People implements Com{public int add(int a,int b) {return a + b;}}public class 习题5_阅读3 {public static void main(String args[ ]) {Student stu = new Student ();Com com = stu;int m = com.add(12,6);People p = stu;int n = p.add(12,8);System.out.printf("%d:%d",m,n); //【代码】}}

5.请说出E类中[代码1]，[代码2]的输出结果依次是______ ，______ 。 interface Com { int add(int a,int b); }abstract class A { abstract int add(int a,int b);int g(int a,int b) { return a+b; }}class B extends A implements Com{ public int add(int a,int b) { return a+b; } int g(int a,int b) { return a*b; }}public class E {public static void main(String args[]) { B b = new B(); Com com = b; System.out.println(com.add(10,5)); //[代码1] A a = b; System.out.println(a.g(10,5)); }} //[代码2]

Com in COM Port means ______________.

下列模块属于MS-DOS核心部分的是（） A: IBMBI B: COM     C: IBMDI D: COM         E: FORMA F: COM  G: IBMDO H: COM      I: COMMAN J: COM      K: XCOP L: COM

________ is known to all，good friends _________ happiness and value to life. A: It; add B: As; add C: It; add up D: As; add to

在Windows中查找扩展名为.COM与.EXE的文件,应在"查找"对话框输入( )。 A: *.EXE*.COM B: *.EXE/*.COM C: *.EXE *.COM D: *.EXE,*.COM

下列电子邮件地址中正确的是____。 A: zhangsan&sinA、com B: lisi!126、com C: zhang$san@qq、com D: lisi_1982@sohu、com

增加约束用（ ）语句是实现。 A: ADD COLUMN B: ADD CONSTRAINT C: ADD FILE D: ADD TABLE

假设有窗口frame，下列哪个将组件com添加到了frame的南区（ ）。 A: con.add(com, BorderLayout.CENTER) B: con.add(com, BorderLayout) C: con.add(com, BorderLayout.EAST) D: con.add(com, BorderLayout.SOUTH)