2. 外语
  3. A —feedback B —floppy disk C —check digit D —keyboard E —flow chart F —command G —control unit H —backbone network I —integrated

A —feedback B —floppy disk C —check digit D —keyboard E —flow chart F —command G —control unit H —backbone network I —integrated

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问题 A —feedback B —floppy disk
C —check digit D —keyboard
E —flow chart F —command
G —control unit H —backbone network
I —integrated circuit J —data processing
K —data capture L —card reader
M —electronic cash N —index
O —encode P —shareware
Q —display unit
( )校验数位 ( )编码
选项
答案C O
解析
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