银行要保持一种产品的竞争优势,只能是通过金融创新发明新产品来保持。()
A.正确
B.错误
第1题
A.(STM-1)155Mbit/s,
B.(STM-4)622Mbit/s,
C.(STM-16)2.5Gbit/s,
D.(STM-64)10Gbit/s.
第2题
A. the signal to noise of the current optical amplifier
B. the signal to noise of the previous amplifier or source
C. the signal to noise introduced by the optical multiplexer
D. the accumulated noise to signal ratio of the optical channel
第3题
A.addition
B.subtract
C.multiply
D.divide
第4题
A.Fiber ovality
B.Input power of the optical signal
C.Fiber bending
D.Fiber length
第5题
A、Infrared
B、Visible spectrum
C、Invisible ultraviolet
D、None of above options
第6题
A. fiber dispersion
B. signal attenuation
C. transmitter power
D. amplifier bandwidth
E. receiver dispersion tolerance
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