is an electronic payment system developed by Dr.David Chaum, who is widely regarded as an inventor of digital cash.
单选题2019-05-03 13:51:50
0286 A.DigiCash
B.E-cash
C.A and B
D.A or B
参考答案:……查看答案
感兴趣题目
The fifth generation computers, with artificial intelligence,______ and perfected now.The ability to store knowledge makes computers different from every other machine ______ invented.
A) ever B) thus C) yet D) asYou ______ her in her office last Friday; sheThe basic input device on a small computer is a ________.The fifth generation computers, with artificial intelligence,______ and perfected now.2.The term payment card refers toThe physical components of a computer are collectively called _________.1. is a secure protocol jointly designed by Mastercard and Visa with the backing of Microsoft, Netscape, IBM, GTE, SAIC, and other companies.A VPN is physically but virtually求极限若函数在某点处不可导,则函数在该点处一定不连续.若f 在[a,b]上连续,则f在[a,b]上可积.