The three wavelengths used in optical fiber communication are ( )
A、λ=0.85um，λ=1.20um，λ=1.80um;
B、λ=0.80um，λ=1.51um，λ=1.80um;
C、λ=0.85um，λ=1.31um，λ=1.55um;
D、λ=0.85um，λ=1.20um，λ=1.80um
发布时间：2024-10-01 05:36:10
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