SSB通信的优点是（）。

In which case is a controller supposed to say CORRECTION?

Radio check requirement order is （ ） .

The abbreviated call sign of TWA NGPED is （ ） .

In RTF communication, the aircraft call sign 9099X is spoken as （ ） .

Prior to starting transmission, a pilot or controller should （ ） .

When visibility is lower than （ ）meters, tower controller should report RVR to pilots..

（ ） should make the final decision of landing or going around and be responsible for it.

The term “roger” means （ ） .

The phrase “go ahead” means （ ） .

In RTF communication, the number 34,900 is transmitted as （ ） .