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多項選擇題

Given:

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*/}}

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