通常使用下列哪种方法来实现抗抵赖性()。
A.加密
B.数字签名
C.时间戳
D.数字指纹
参考答案:C
.
____ at the airport, he telephoned his wife and told her what he would do when he got home.
A.Once arrived
B.As soon as he reached
C.When he got
D.Upon arriving
下列哪一项不属于商业银行的“三性”原则?()
A、安全性
B、流动性
C、盈利性
D、政策性