29. 下列四種常見的I/O連接埠,具熱插拔(Hot Plug)與隨插即用(Plug and Play)功能,且可擴充裝置數目最多者為何?
(A) IEEE 1394 
(B) USB 2.0 
(C)序列埠(Serial Port) 
(D)並列埠(Parallel Port)

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統計: A(1), B(1), C(0), D(0), E(0) #980823