A、最小权益策略
B、最大权益策略
C、接入控制策略
D、数据加密策略
—What'stheweathergoingtobelikeattheweekend?
—______.
A、Idon'tthinkwehavehadmuchsnow
B、Thestormwon'tlasttoolong
C、It'sgoingtobeverycoldandcloudy
D、Wearetobecaughtinaheavyrain
A、PAA，PAB，CA
B、PAA，PAB，DRA
C、PAA，CA，ORA
D、PAB，CA，ORA
A、VPN
B、安全E-mail
C、Web安全
D、视频压缩
设A为3阶方阵，特征值分别为-2，1，1，则|5A-1|=______________.