单项选择题
A.模式色散、材料色散、波导色散B.材料色散、波导色散C.材料色散D.波导色散
A.-12dBm B.-17dBm C.-23dBm D.-28dBm
A.KILL B.WHO C.RM D.MV
A.-10dBm B.-13dBm C.-20dBm D.-26dBm
微信扫一扫,加关注免费搜题
