A．10.45 B．12.54 C．20.9 D．22.99
A．测者能见地平距离 B．物标能见地平距离 C．物标地理能见距离 D．雷达地理能见距离
A．21.4nmile B．27.2nmile C．28.6nmile D．25.0nmile
A．6.27 B．8.36 C．10.45 D．18.81
A．大于22nmile B．小于22nmile C．大于20.9nmile D．小于20.9nmile
