在电子政务系统建设的框架中,安全支撑体系包括
A.信任服务体系
B.可信时间戳服务
C.授权管理基础设施PMI
D.密钥管理中心
E.网络信任域基础设施
正确答案是ABCDE
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Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
Continuous exposure to sound above 80 decibels could be ( ). (harm)