单选题:The virtual device is usually implemented by using _____.
The virtual device is usually implemented by using _____.@[C](1)
A. channel
B. buffering
C. SPOOLing technique
D. controller
A.channel
B.buffering
C.SPOOLing technique
D.controller
答案:C
A. channel
B. buffering
C. SPOOLing technique
D. controller
A.channel
B.buffering
C.SPOOLing technique
D.controller
答案:C