单项选择题
A.0 ps/nm
B.340 ps/nm
C.200 ps/nm
D.3400 ps/nm
E.More information is needed.
多项选择题 What are three factors that limit the maximum distance of an amplified optical signal without regeneration? （）(Choose three.)
多项选择题 Click the Exhibit button. When designing a DWDM system with multiple amplified spans, a pre-amp is needed at Site B to （）. (Choose three.)
单项选择题 How is a Thin Film filter fabricated?（）