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多項選擇題

public class Parent { 
public int addValue( int a, int b) {    
int s;    
s = a+b;    
return s;    
}    
} 
class Child extends Parent { 
} 
Which methods can be added into class Child?()   

A. int addValue( int a, int b ){// do something...}
B. public void addValue (){// do something...}
C. public int addValue( int a ){// do something...}
D. public int addValue( int a, int b )throws MyException {//do something...}

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