( ) switching was invented in the late 1960s for data communications.

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问题 (    ) switching was invented in the late 1960s for data communications.

选项 A、Frame
B、Link
C、Packet
D、Line

答案C

解析 本题翻译为:
(    )交换发明于20世纪60年代晚期,为数据通信而生。
A.帧  B.连接  C.分组  D.线性
与数据通信相关的,是分组交换,选C。
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