A.private void fight(String field){...} B.public void fight(String field){...} C.protected void fight(String f){...} D.protected void fight(String field){...}
A.提高代碼可讀性 B.復用父類的屬性和方法 C.提高代碼的擴展性 D.以上都可以
A.private B.protected C.public D.以上都可以