21.在PC電腦中,滑鼠及數據機(MODEM)等週邊裝置,大多以何種介面連接到主機上?
(A)RS-232
(B)Centronic
(C)10Base-T
(D)RS-422
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統計: A(0), B(0), C(2), D(0), E(0) #1078569
統計: A(0), B(0), C(2), D(0), E(0) #1078569