10：05航空器对正电台飞行，相对方位角为0°，保持当时航向飞行5分钟后，再次测得相对方位角为2°，已知未飞时间为15分钟，偏流是（）。

DLH762, expect departure at 15, （ ） at your own discretion.

GDT, expect one minute delay （ ） B737 taxiing behind.

Ground, JAL167, stand D3, request pushback; JAL 167, pushback （ ） .

PAA120, slot time 55, start up at your own discretion means that （ ） .

SF235, Stand B3, information L, request （ ） for New York.

BAW337, your signal is unstable，check your transmitter and give me （ ） .

Station calling ground, I can’t read you, please （ ） 119.l.

Your signal is jammed, please check your （ ） .

You are loud and clear means that I read you （ ） .

I can hear you but with difficulty refers to readability （ ） .