什么是PKI,它包含哪些组成部分?
参考答案:
是公钥基础设施,是由1.认证机构2.公钥证书库3,密钥备份及恢复系统4.公钥证书撤销系统5.PKI应用接口等
简述飞机大迎角失速机理?
On receipt of a distress alert, the SAR units ashore and at sea will()soonest.
A.coordinate in rescue operation
B.send rescue vessels
C.reach the area at once
D.conduct a sector search