As a few hardware issues (exercise)

1, a computer must have the input device is what ()
A, mouse B, scanners C, the keyboard D, digitizer
2, PC General Register of the median ()
A, 8 -B, 16 bit C, the computer long D, 32 bit
3, “” hexadecimal code is 397A, that is his code ()
A \ B9FA B \ BB3H7 C \ A8B2 D \ C9HA

1:C, keyboard
2:C, the computer long
3:A \ B9FA