We say that blockchain is the second generation of Internet technology, and its main areas of problem solving are（）
A. Social relations
B. Production relations field
C. Production efficiency field
D. Human-machine collaboration field
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Blockchain economic organization-value community, the foundation of its trust is（）
A. company policy
Blockchain ledger
C. National law
D. People’s Court
The most important change in the blockchain business model is（）
A. Logistics reconstruction
B. Information flow reconstruction
Capital flow reconstruction
D. Value stream reconstruction
Sociologically speaking, the main goal of blockchain change is（）
A. Monopolistic internet economy
B. Improve information processing efficiency
C. Optimize data structure
D. Realize multi-party information sharing
Blockchain is used for depositing evidence, mainly using its technical characteristics（）
A. Data cannot be tampered with
B. Encrypted storage
C. distributed
D. Centralization
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