地面建筑对水平波束的反射会引起反射回答，一个稳定的反射回答和真实目标的回答的区别是（）。

（ ） approach is non-precision approach.

The functioning altitude for terrain alert system is （ ） feet.

The fire-fighting agent used to put out brake fire of A/C is （ ） .

Which of the following is not favorable to increasing takeoff weight?

The three fire-fighting agents for cabin fire-fighting purposes are （ ） .

In theory, Coriolis Force in the （ ） area has no effect on wind direction.

The alternating current frequency of the primary power supply on A/C is（ ）.

The obvious tyre temperature rise during speed reduction on landing is due to（ ）.

The most suitable fire-fighting agent in portable extinguishers on A/C is （ ） .

The color of the anti-collision lights on the aircraft is （ ） .