飞机重心位置靠（），则纵向安定性（）。

When maintaining FL210, what type of altitude is used?

Pressure altitude will be equal to true altitude （ ） ．

Pressure altitude and density altitude will be the same values （ ） ．

Absolute altitude is defined as （ ） ．

True altitude is defined as （ ） ．

（ ） is defined as pressure altitude corrected for non-standard temperature.

When the altimeter is adjusted to standard sea level atmospheric pressure of 29.92 in Hg, （ ） is displayed on the altimeter.

The altitude that the pilot reads directly from the altimeter when it is correctly adjusted to the local altimeter setting is （ ） ．

（ ） for the local flight area is essential to minimize altimeter errors.

（ ） is calibrated airspeed corrected for the compression of air at a particular altitude.