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試卷名稱
考試中心《》在線考試
試卷年份2018年上半年
試題題型【單選題】
試題內(nèi)容

( )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

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