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题目详情

单选题 The group keystrokes or characters in choice ______ is sent as part of ARQ communications to signal the end of the text

A. four "N" s, i.e. "NNNN"

B. "BRK+"

C. four "Q" s, i.e. "QQQQ"

D. five periods (".....")

GMDSS 英语课程封面

学科:GMDSS 英语

时间:2023-11-06 00:29:18

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