题目内容
(请给出正确答案)
[主观题]
CD-ROM光盘的光道是从最里面向外边形成的一个连续的螺旋形的光道。光道间间距为1.6μm,光道的宽度为0.6μm,总长度为5km,道密度达到多少:()
A.20000道/英寸
B.32000道/英寸
C.16000道/英寸
D.1600道/英寸
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A.20000道/英寸
B.32000道/英寸
C.16000道/英寸
D.1600道/英寸
A.umount/mnt/cdrom
B.unmount/dev/hdc
C.umount/mnt/cdrom/dev/hdc
D.unmount/mnt/cdrom/dev/hdc
A.mount /mnt/cdrom
B.mount /mnt/cdrom /dev/hd
C.mount /dev/hdc /mnt/cdrom
D.mount /dev/hdc
A.umount/DEv/hDC
B.unmount/DEv/hDC
C.umount/mnt/CDrom/DEv/hDC
D.unmount/mnt/CDrom/DEv/hDC