单项选择题
What is the phenomenon called where different wavelengths of light travel at different speeds？（）
A. OSNR B. dispersion C. light skew D. attenuation
单项选择题 WhichdevicecreatesanOEOconversion？（）
单项选择题 Whatisthedifferencebetweenthetransmittedpowerandthesensitivityofthereceiver？（）
多项选择题 Whichthreetechnologiesareusedtoreducechromaticdispersionaccumulationinfiber-optictransmissionsystems？（）
