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多项选择题

public abstract class Shape { 
private int x; 
private int y; 
public abstract void draw(); 
public void setAnchor(int x, int y) { 
this.x = x; 
this.y = y; 
} 
} 
Which two classes use the Shape class correctly?()

    A. public class Circle implements Shape { private int radius; }
    B. public abstract class Circle extends Shape { private int radius; }
    C. public class Circle extends Shape { private int radius; public void draw(); }
    D. public abstract class Circle implements Shape { private int radius; public void draw(); }
    E. public class Circle extends Shape { private int radius;public void draw() {/* code here */} }
    F. public abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }

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