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题目内容
(佳木斯大学语言治疗学)
H.248的消息从外向内嵌套依次是____。
·Transaction/Action/Command
·Transaction/Command/Action
·Action/Transaction/Command
·CommandTransaction/Action/
·Transaction/Action/Command
·Transaction/Command/Action
·Action/Transaction/Command
·CommandTransaction/Action/
参考答案