仪表进近飞行是航空器根据（），并对障碍物保持（）所进行的一系列预定的机动飞行。

Before lining up, the pilot should switch to tower control （ ） ．

Which of the following is not true for ATIS?

The sequence of aircraft position report en-route should be （ ） ．

Which of the following situation for which ATC is responsible is not an ATC accident?

Which of the following is not a purpose for the establishment of standard phraseology in RTF communication?

Readback procedure is not a necessity for（ ）.

The phrase “unable to comply” is used （ ） ．

The phrase “if not possible, advise” may be used together with the clearance or instruction （ ） ．

If a correction can best be made by repeating the entire message, the operator shall use the phrase “（ ）” before transmitting the message a second time．

Which statement below is not true?