1mm=()um。A.1OB.1OOC.1000D.10000E.100000
1mm=()um。
A.1O
B.1OO
C.1000
D.10000
E.100000
相关考题:
目前光纤通信三个实用的低损耗工作窗口是A.0.85um,1.27um,1.31umB.0.85um,1.27um,1.55umC.0.85um,1.31um,1.55umD.1.05um,1.27um,1.31um
目前光纤通信三个实用的低损耗工作窗口是目前光纤通信三个实用的低损耗工作窗口是A.0.85um,1.27um,1.31umB.0.85um,1.27um,1.55umC.0.85um,1.31um,1.55umD.1.05um,1.27um,1.31um
光纤通信所使用的三个波长是()。A.λ=0.85um,λ=1.20um,λ=1.80umB.λ=0.80um,λ=1.51um,λ=1.80umC.λ=0.85um,λ=1.31um,λ=1.55umD.λ=0.85um,λ=1.20um,λ=1.80umE.λ=0.85um,λ=1.50um,λ=1.80umF.λ=0.85um,λ=1.50um,λ=1.80um
光纤通信所使用的三个波长是A.λ=0.85um,λ=1.20um,λ=1.80umB.λ=0.80um,λ=1.51um,λ=1.80umC.λ=0.85um,λ=1.31um,λ=1.55umD.λ=0.85um,λ=1.20um,λ=1.80umE.λ=0.85um,λ=1.50um,λ=1.80umF.λ=0.98um,λ=1.20um,λ=1.80umG.λ=850nm,λ=1310nm,λ=1550nm
掺铒光纤放大器里,泵浦光源的工作波长是()A.0.98um和1.48umB.0.99um和1.31umC.0.85um和0.98umD.1.48um和1.31umE.1.55um和0.98umF.1.50um和1.31um