下面代码的第//Line 1和//Line 2行将调用哪个类的方法？ (     )

class Rectangle { 
    double width, length; 
    Rectangle(double width, double length) {
        this.width = width; 
        this.length = length; 
    } 
    double getArea() { 
        double area = width * length; 
        return area; 
    } 
    void show() { 
        System.out.println("The width and length are: " + width + ", " + length); 
        System.out.println("The area is: " + getArea()); 
    } 
} 
class Square extends Rectangle { 
    double width, length; 
    Square(double width) { 
        super(width, width); 
        this.width = width; 
    } 
    double getArea() { 
        double area = width * width; 
        return area; 
    } 
    void show() {
        System.out.println("The width is: " + width); 
        System.out.println("The area is: " + getArea()); 
    } 
    public static void main(String[] args) { 
        Rectangle shape1 = new Rectangle(5, 2); 
        Rectangle shape2 = new Square(5); 
        shape1.show();          // Line 1
        shape2.show();          // Line 2 
    } 
}