已知类的继承关系如下： classEmployee; classManagerextendsEmployee; classDirectorextendsEmployee; 下语句能通过编译的有哪些？ A: Employeee=newManager(); B: Directord=newManager(); C: Directord=newEmployee(); D: Managerm=newDirector();

已知类的继承关系如下： classEmployee; classManagerextendsEmployeer; classDirectorextendsEmployee; 下语句能通过编译的有哪些？ A: Employeee=newManager(); B: Directord=newManager(); C: Directord=newEmployee(); D: Managerm=newDirector();

已知类的继承关系如下: A: assEmployee; B: assManagerextendsEmployeer; C: assDirectorextendsEmployee; D: 下语句能通过编译的有哪些？ E: Employeee=newManager(); F: Directord=newManager(); G: Directord=newEmployee(); H: Managerm=newDirector();