在(1)~(3)处填上适当的语句,使程序能正常运行。. (1) class Employee { public abstract void show(); } class SalEmp extends Employee{ public void show(){System.out.println("SalEmp");} } class TelEmp extends Employee { (2) { System.out.println("TelEmp ");} } public class Demo{ public static void main(String []args){ SalEmp p=new SalEmp(); p.show(); (3) p1=new TelEmp (); p1.show(); }}