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多项选择题Which two statements are true about the security-related tags in a valid Java EE deployment descriptor？（）

A、Every  tag must have at least one  tag.

B、A  tag can have many  tags.

C、A given  tag can apply to only one  tag.

D、A given  tag can contain from zero to many  tags.

E、It is possible to construct a valid  tag such that，for a given resource，no user rolescan access that resource.

  • B,E

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