( ) 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.

  • ACloud service
  • BBlockchain
  • CInternet of things
  • DArtificial intellingence
参考答案: B
解题思路: 2018.05>>>立即刷题