以下属于4A策略管理模块可以管理的为（）。
A、访问控制策略
B、信息加密策略
C、密码策略
D、防火墙策略
参考答案：C
—You look so young. Haven’t you graduated from your university?
—Yes, I________in the English Department of Shandong University for four years.
A．studied
B．study
C．had studied
D．was studying
汽包主要构件有哪些？其各自作用是什么？
