固态频率源为雷达系统提供射频发射信号频率、本振信号频率、中频相干振荡频率等,它们之间 发布时间:2018-03-20 14:18 │ 来源:www.tikuol.com 题型:单项选择题 问题: 固态频率源为雷达系统提供射频发射信号频率、本振信号频率、中频相干振荡频率等,它们之间有确定的()关系,称为全相干信号。A.相位B.振幅C.频率D.反馈
题型:单项选择题 In the story ofAtlanta,I don't think Hippomenes____winning the racebecause he cheated the princess in the race. [ ]A. reserved B. preserved C. deserved D. responded 查看答案