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Blockchain's hallmark is decentralization. Data can be shared among a distributed network of computers with no need for middlemen. After being recorded in a blockchain-based ledger, data can't be altered.
Both "black boxes" have been found, the official said.
Boeing will slow production of the 737 MAX jet to avoid a glut of unsold planes amid the worldwide slowdown in air travel due to the novel coronavirus pandemic.
Bloomberg's editorial board view Trump administration's refusal to work with the World Health Organization as a foolish position, saying that it not only subverts America's proud tradition of world leadership and compassion in public health but also makes it harder to defeat COVID-19, which will persist until it is brought under control everywhere.
Bond financing of private enterprises will be strengthened with a better policy environment, it said.
来源：资阳报