TCAS告警过程中，在第一个RA信息出现时，驾驶员应当在（）s钟之内作出初始垂直速度响应,对增加或“反向”应在2.5s种之内作出垂直速度响应。

Which following elements of information shall the position reports contain? a. aircraft identification, b. position, c. time, d. flight level or altitude, e. next position and time over, f. ensuing significant point.

The prescribed standard turn slope in a holding procedure is （ ） degrees.

The spread of long wave and medium wave is mainly in the form of （ ） .

The communication frequency for VOR is between （ ） .

Area navigation system has （ ） operational capabilities.

The farthest distance the weather radar can detect is （ ） miles.

At the landing phase, to avoid the wake turbulence of preceding aircraft, the succeeding aircraft should （ ） .

The numbering of domestic regional air lines falls into two categories: （ ） used between the flight control regions, and （ ） used within the flight control regions.

（ ） can be started up when flying in the air.

Overloading refers to （ ） .