6、Person p1 = new Person（18); //Person是引用类型 Person p2 = p1; 如果 p1.age=35; 则 p2.age也是35
6、Person p1 = new Person（18); //Person是引用类型 Person p2 = p1; 如果 p1.age=35; 则 p2.age也是35
参考答案和解析
Song(n)->(n)Person(Author)
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