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判斷題

給定以下代碼，classShape{/.../}classCircleextendsShape{/.../}classRectangleextendsShape{/.../}classNode{/.../}那以下代碼可以編譯通過。Nodenc=newNode（）;Nodens=nc;

答案：錯(cuò)誤

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以下代碼可以編譯通過。publicclassSingleton{publicstaticTgetInstance（）;returninstance;}privatestaticTinstance=null;}

答案：錯(cuò)誤

給定以下代碼，classNodeimplementsComparable{publicintcompareTo（）;Comparablecomp=node;

答案：正確

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