在线名词解释大全 - 单选题 - 详细

jx12.已知类的继承关系如下:classEmployee;classManagerextendsEmployee;classDirectorextendsEmployee;则以下语句能通过编译的有哪些?

A
Employee e=new Marrager();
B
Director d=new Manager();
C
Director d=new Employee();
D
Manager m=new Director();
正确答案:
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