多选题

Given two different character sets （A and B）， which of the following must be true for A to be considered a strict superset of B？（）

A A must contain all of the characters defined in B

B A must be Unicode

C The encoded values in A must match the encoded values in B for all characters defined in B

D A must be a multibyte character set

E The encoded values in A must match the encoded values in B for all numeric and alphabetic character

略

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