2018年上半年信息系統(tǒng)項(xiàng)目管理師上午綜合知識(shí)真題試題與答案：
72、（）is a decentralized, distributed and public digital ledger that is used to record transactions across many computers so that the record cannot be alterred retroactively without the alteration of all subsequent blocks and the collusion  of the network.
A、Cloud service
B、Blockchain
C、Internet of things
D、Artificial intellingence
信管網(wǎng)參考答案：B（僅供參考，歡迎評(píng)論區(qū)交流）

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