保险代理人是基于投保人的利益,为投保人与保险人订立保险合同提供中介服务,并依法收取佣金的机构。
接收机互调产生在接收机的();发射机互调产生在发射机的()放大器上。
Which of the following is the reason that the metacentric height is a valid measure of only the initial stabilit?(). The metacenter does not remain in the same position for large angles of inclination。 The center of gravity shifts due to inclination。 The center of gravity shifts above the metacenter as the vessel is inclined。 The mean draft will change as the vessel is inclined。
指配频带(不涉及空间电台)的带宽是必要带宽加上()的两倍。
数字微波系统的容量是指每一射频波道传输的标称()率。
诚信教育普及阶段中,针对理念的是()