多项选择题
ZXMP M800 can be applied to a（）channel system.
A.8 B.16 C.40 D.80
多项选择题 A ZXWM M900 system provides several wavelength stabilizing methods, including （）.
多项选择题 he ZXWM M900 system transmits network management information using specified monitoring channel at a rate of（）.
多项选择题 Select boards allowing optical protection from the following options. （）
