影响喷气发动机推力大小的基本因素是（）。

The airspeed required to sustain an aircraft in straight and level flight depends on （ ） ．

Lift is proportional to the square of the airplane’s velocity. If an airplane’s speed is reduced by one half, lift （ ） ．

Lift is proportional to the square of the airplane’s velocity. If an airplane’s speed is doubled, lift increases （ ） ．

The indicated airspeed of a stall varies with （ ） ．

An airplane stalls when （ ） , regardless of weight or airspeed.

The way to recover from a stall is to （ ） ．

The occurrence of a stall is directly related to （ ） ．

A stall will normally result in a rapid decrease in （ ） ．

A stall is caused by the separation of airflow （ ） ．

The coefficient of lift is a way to measure lift as it relates to the （ ） ．