Optical discs use these to represent data.
Analog signals
B. Magnetic charges
C. Pits and lands
D. Laser beams
查看答案
A CD-RW disc _______.
A. can be written to only once
B. can be erased and rewritten
C. cannot be written on
D. cannot be erased
All of the following are true of DVD-ROM drives except:
A. They are also known as erasable optical discs.
B. They can provide over two hours of high-quality video and sound comparable to that found in motion picture theatres.
C. They are a type of optical disc.
DVD-ROM stands for "digital versatile disc-read only memory.”
The large capacity, high-definition optical discs designed to store hi-def video and video games are _______.
A. DVD-RAM
B. HD DVD
C. Blu-ray
D. HD CD
These discs have a capacity of 50 gigabytes on one side.
A. HD DVD
B. CD
C. DVD
D. Blu-Ray
微信支付 
支付宝支付