压力加油系统的优点是（）。

If the airplane is slightly below the glide slope of a runway with four-light PAPI, the pilot will see （ ） ．

An on glide slope indication from a four-light PAPI is （ ） ．

An on glide slope indication from a tri-color VASI is （ ） light.

An above glide slope indication from a tri-color VASI is （ ） light.

A below glide slope indication from a tri-color VASI is （ ） light.

An on glide slope indication from a two-bar VASI is （ ） ．

Which is true regarding STARs?

An above glide slope indication from a two-bar VASI is （ ） ．

A below glide slope indication from a two-bar VASI is （ ） ．

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