{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"In blockchain smart contracts, how can data be queried?","a":"Utilizing the programming interfaces of smart contracts: Different blockchain platforms provide different programming interfaces for smart contracts. These interfaces allow smart contracts to interact with the underlying blockchain infrastructure, enabling the execution of data queries and  other operations."}]}],"pr":"15ba91ba16abe7b5c746edd4fde1be244f8fc0c12b275e799259aa58b28cddde"}