2021-03-15到2021-07-17
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Task 1 Cognition of Optical Fiber Communication System Test 1
1、 The production material of optical fiber is ( )
A:Copper
B:Iron
C:Compound
D:Quartz
答案: Quartz
2、 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