基礎ict-u06-d04
Lossless compression:
A. Allows the original file to be rebuilt exactly✓ 答案
B. Is always smaller than lossy compression for photographs
C. Removes the need to back up files
D. Can only be applied to text files
解說
Lossless methods such as PNG and ZIP rebuild the original bits exactly, which is why they are used where exactness matters. For photographs a lossy method usually achieves a far greater reduction in size.