电波在传播过程中，由于扩散及媒质吸收两方面的原因，会使电波的（）逐渐减小。

At what stage of the journey does the pilot contact approach control?

If runway 24 is 240 degrees, the heading is （ ） degrees.

The holding position is usually at the （ ） .

I read the Met report to the pilot but he did not answer so I told him to（ ）.

When executing a flight, the flight crew should check in （ ） before ETD and make well pre-flight preparations.

What are the methods to transfer radar identification?

What is the purpose of Standard Instrument Departures?

When the weather at the landing airport or alternate airport is （ ） , a second alternate airport is to be specified.

To what are silent departure procedure specified in Letters of Agreement between facilities?

GAB （ ） 20 miles east of ZW, continue present heading.