Practise
1、单选题:
"Optical fiber communication" refers to ( )
选项:
A: A communication mode in which radio waves are used as carriers and optical fibers are used as transmission media.
B: A communication mode in which optical waves are used as carriers and optical fibers are used as transmission media.
C: A communication mode in which optical waves are used as carriers and cables are used as transmission media.
D: A communication mode in which laser is used as carriers and optical fibers are used as transmission media.
答案: 【 A communication mode in which optical waves are used as carriers and optical fibers are used as transmission media.】点我阅读全文