（）is an open,distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way.
A.Internet of things B.Blockchain C.Edge computing D.Artificial intelligence正确答案B
（）is an open,distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way.
A.Internet of things B.Blockchain C.Edge computing D.Artificial intelligence正确答案B
