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Boeing Co said on Thursday it had completed a software update for its 737 MAX jets, which have been grounded worldwide since March after they were involved in two fatal crashes.
Blockchain, a digital ledger system, uses sophisticated cryptographic techniques to create a permanent, unchangeable and transparent record of exchanges to keep track of transactions.
Boeing remains confident in the aircraft, he said. "It will be among the safest airplanes ever to fly."
Birmingham Junior Conservatoire student Lauren Zhang, who was born in the United States and whose parents are from China, finished ahead of two Britons – 18-year-old cellist Maxim Calver and 18-year-old saxophonist Robert Burton – in the final round, which was broadcast on British television from the Birmingham Symphony Hall on Sunday.
Both Amazon and Luxembourg financial authorities deny any wrongdoing.
来源：资阳报