RBAC(基于角色的访问控制)具有哪些特点()
A.以角色作为访问控制的主体
B.角色集成
C.最小权限原则
D.职责分离
E.角色容量
参考答案:A, B, C, D, E
When he came to the door, my father ___ him at once although he was now a very old man.
A.knew
B.looked at
C.recognized
D.found