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多项选择题You have a durable subscriber, and the subscriber is down or not reachable when the message is  produced. Which two options regarding the expiry of these messages are true?（）

A、after the subscriber is unavailable for 10 minutes

B、when the subscriber is available

C、after the subscriber is unavailable for after an hour

D、are available until the specified time elapses

E、are expired instantly

  • B,D

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