SSB发信机由()组成①单边带激励器②非线性功率放大器③线性功率放大器④天线调谐单元 发布时间:2017-05-29 12:19 │ 来源:www.tikuol.com 题型:单项选择题 问题: SSB发信机由()组成①单边带激励器②非线性功率放大器③线性功率放大器④天线调谐单元⑤解调器⑥天线A.①③④⑥B.①③⑤C.②④⑥D.②③④⑤⑥
题型:单项选择题 He came to my class every week, but his attitude ______ he was not really interested in the subject.A.expressedB.describedC.explainedD.suggested 查看答案