1. 给出下面的不完整的类代码 class Person { String name, department; int age; public Person(String n){ name = n; } public Person(String n, int a){ name = n; age = a; } public Person(String n, String d, int a) { // 完成Person(String n, int a)的逻辑 department = d; } } 下面的哪些表达式可以加到构造方法中的注释处? ( ) A. Person(n,a); B. this(Person(n,a)); C. this(n,a); D. this(name,age);
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