机上ADF输出方位信号到RMI上指示,其针尖指示的是什么方位角().
A.飞机方位角(QDR)
B.电台方位角(QDM)
C.相对方位角(RB)
参考答案:B
Helen with the football player____ from the USA. They ____ American.
A. are; are B. is; are C. is; is D. are; is
A.一定升高
B.一定不变
C.一定降低
D.无法确定