5.Feedbacks enable the sender to know whether the receiver has received the message successfully or not.

科目名称：人文英语4

试卷号：10862，11390

题型：阅读理解(判断题)

题目：5.Feedbacks enable the sender to know whether the receiver has received the message successfully or not.

选项：A. T B. F

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答案：A. T