Which conditions will normally cause a SART to operate in the active mode?() It will respond only to interrogation by 9-Ghz radar signals。 A SART will normally respond to interrogation from a searching vessel's radar if the radar antenna is at least 15 meters high。 A SART will normally respond to interrogation from a searching aircraft's radar if the radar's output power is at least 10,000 watts and the aircraft is at a height of 3000 feet and within 30 nautical miles。 All of the above。
windows 2000/xp2003进入安全模式,是在启动的时候按()。 F5。 F6。 F7。 F8。
冬季施工的温度条件是如何规定的?
电信监督管理遵循政企分开、破除垄断、鼓励竞争、促进发展和()的原则。 A.公开。 B.公平。 C.合理。 D.公正。
喷混凝土强度检查试件如何制作?有何要求?
“班级授课制”的真正奠基者是()